A distinction is made between metric thread types and inch thread types. In our case, the correct tap drill would be the closest to 3.4 mm from below, and that is the 3.3 mm or .13-inch tap drill. blue bell, pa. 19422 dimensions sae straight thread port dimensions nominalc f size tube thread a b* +.015 d e +.005 g h code size size min min -.000 min max -.000 min 1 - 2 1/8 5/16-24 .062 .390 .074 .468 .062 .358 .672 12 . G is generally referred to as the pipe thread (Guan), 55, 60 degrees division belongs to functional, commonly known as round tube. If you have any questions please contact us or check out our fittings with BSPP/ BSPT (G) thread. 05-26-2019 11:20 PM. They are compatible with High-Pressure Thread-Lock-shape plugs and sockets. The pitch is calculated by measuring the distance between the first and second tooth. A centring cone offers the possibility to also use self-centring seals. Form E means that behind the thread there . . British & ISO Pipe Thread tap drill size Popup chart BSPT (Taper) BSPP (Straight) ISO (Taper) ISO (straight) designation Pipe Size TPI Tap Drill Size Decimal inch Tap Drill Size Decimal inch Tap Drill Size mm Decimal inch Tap Drill Size mm Decimal inch; 1/16 - 28 : 28: 1/4: 0.2500: F: 0.2570: 6.3mm: 0.2480: Sold by KMIAN TOOLS and ships from Amazon Fulfillment. 2020-01-03 02:09:29. If they're on the outside of the thread, it's a male thread. You previously purchased this product. G is the general designation of pipe threads (Guan). View in Order History. Mid-Size Round Vacuum Pad w/ Slip-On Foam Seals; Foam Vacuum Pads of All Types; . Designation of thread. Buy Festo QS Series Straight Threaded Adaptor, G 1/8 Male to Push In 8 mm, Threaded-to-Tube Connection Style, 186098 QS-G1/8-8 or other Pneumatic Fittings online from RS for next day delivery on your order plus great service and a great price from the largest electronics components . 4 Controlled Root Radius on Internal Thread. http://www.festo.com/cms/en-us_us/4298.htm This will also help Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. They seal with a metric O-ring. If LH is added to the end, it means the pipe has a left-handed thread. SIZE: TPI: MAJOR (EXT) MINOR (INT) TAP DRILL: 1/8" 28: 9.728: 8.566: 8.70: 1. For example, for M12x1.0, the outer diameter of the threads is 12 mm with a 1.0 mm spacing between threads, Hydraulics Direct Reviews Elbows are couplers with a 90-degree turn.. Bushings are used to convert from one size to another. Major Dia. To convert from N-m to ft-lbs, multiply N-m by 0.7375. How to Identify Different Types of Threads. In the case of a thread of size 1/8", for example, the threads are specified as G1/8 or R1/8. BRITISH STANDARD PIPE THREADS METRIC THREADS AMERICAN NATIONAL PIPE TAPER SAE 24 FLARELESS THREAD SAE STRAIGHT THREAD WITH O-RING SAE FLAT FACE O-RING SAE THREAD WITH 45 FLARE JIC (SAE THREAD WITH 37 FLARE) 3000# CODE 61 FLANGE 6000# CODE 62 FLANGE British Standard Pipe (BSPP, BSPF) Thread Form r = Basic Radius = * 137329 p (mm) L (mm) Slangetilslutning. G 1/8-28 9.9 15 17.2 1.0 8.5 ED10X1X 5-585 7.98 x 1.88 1/8 RR D9DT-2 G 1/4-19 13.3 . THREAD DATA CHARTS METRIC THREAD -- EXTENDED THREAD SIZE RANGE (ISO) Thread Height Male Thread = h3 Thread Height Female Thread = H1 Sorted by thread class Click here to return to the thread data chart page index. These Specifications are for carbon steel. Thread Designation Nominal Size Thread Form Type Major Diameter mm d=D Pitch mm p Threads per inch Pitch Diameter mm d2=D2 Minor Diameter Male Thd. BSPP / BSPT. Sealing is provided by a pre-coating on the thread. South Korea. Use these couplings at pressures up to 10, 000 psi. The size designation (like 3/8") does not mean actual thread OD; it is the internal diameter of the pipe, on which it is used. On the other hand, G 1/4 to DIN 3852-E is widespread in hydraulics. Location. Manufacturer Lead Time: 3 weeks. Subtracting gives the thread size of , also known as -12 Once you have the thread size, it is important to verify the pitch. Note: dash numbers are nominal. Inline people usually use points to call thread sizes, one inch equals eight points, and 1/4 inch is 2 points and so on. Pipe Gages per ASME B1.20.1, ASME B1.20.5 and Hole Location gages stocked. Gevindstandarder. Thread standards are usually referenced in the end connection standard . They will also be used on tube and hose fittings and on port adaptors. Additional Inventory. Part #: AD-G1/8-1/8NPT-I . d3 Thread Height H1 Tap Drill Diameter mm G1/8 1/8" BSPP 9.728 0.907 28 9.147 8.566 0.581 8.70 G1/4 1/4" BSPP 13.157 1.337 19 12.301 11.445 0.856 11.60 Where: D = Major Dia.internal thread D 1 = Minor Dia.internal thread D 2 = Pitch diameter internal thread Thread Size (ISO 228-1) D3 (mm) D4 (mm) L1 max. (4 Narrow Types B & E Wide Types G & H Part No. Pipe thread sizes are usually based on the inside diameter (ID) or flow size. 20 threads per inch on a 1/4" diameter screw is considered coarse: 1/4-20 UNC. Both threads have the same pitch, angle (55 degrees) and shape (rounded peaks and valleys). If they're on the inside of the thread, it's a female thread. They can be a combination of male to female or reduce size. Thread pitch is the distance between the threads and is used for metric fasteners. The ISO (International Standards Organization) has adopted these straight thread sizes for fluid ports on pumps, valves, cylinders, and other components. (mm) SW (Hex) Fitting Material: Optional G (BSPP) Straight Thread Hose Barbs: HS18-18M-G: Adapter, G 1/8 - male to 1/8 NPT - female: G1/8: 1/8 NPT: 0.24 (6) 0.67 (17) 0.55 (14) Electro-Less Nickel . G 1/4" Male Thread G 1/8" G 1/4" G 3/8" G 1/2" G 3/4" Female Thread G 1/8" G 1/4" G 3/8" G 1/2" G 3/4" 9.6 13.0 16.5 20.8 26.3 8.75 11.8 15.25 19.0 24.5: 8.0 10.0 10.0 12.0 12.0 7.4 11.0 11.4 15.0 16.3: NPT Thread Connection National Pipe Thread American Standard According to ANSI/ASME B 1.20.1 Male: They cover a size range from about 1/8 to 2-1/2. The division of 55 and 60 degrees is functional, commonly known as the pipe circles. Standard Price. A rule of thumb is that the right tap drill is around 85% for coarse threads and 90% for fine threads which feature a higher number of threads per axial distance. Port Threads. The "pipe thread size" as shown in column 3 of the table below is measured and based on the inside of the pipe. 3 Controlled Root Radius on External Thread. Thread Adapter, 1/8 ISO G male to 1/8 NPT female, zinc pl steel Download Datasheet. (in.) Plug gage assemblies are marked with the thread size, class of fit and pitch diameters. At certain sizes, NPT and BSP share the same number of threads per inch - at " and " - but at all other sizes the two are . Coarse Thread Sizes Fine Thread Sizes National pipe threads are designated with their nominal size (3/8) followed by number of threads per inch (18) and the symbol for the thread series (NPT). Measure the OD of the BSP thread Take the OD measurement (inches) and subtract inch Example: The OD measures 1. Example: G1/2. Length Thread Size (in.) The minor diameter may be ever so slightly smaller than what is in the table depending upon where it has been manufactured to in the thread gauge. Elbow, G1/8, 10 bar, 6 mm, PBT (Polybutylene Terephthalate), Pneufit C. NORGREN. ISO Metric profile External (bolt thread) Internal (nut thread) Basic mm Size mm Thread Designation Simple Thread Designation Pitch . For example, if we have a 1/4-18 NPT, that means it is a 1/4 inch inside diameter and 18 threads per inch. Mfr. Pitch BSPF Threads ( British Standard Pipe Parrallel Fine ) G 1/16" - G 1" G 1 1/8" - G 3" G 3 1/4" - -G 6". Where: D = Major Dia.internal thread D 1 = Minor Dia.internal thread D 2 = Pitch diameter internal thread DIN 431 - Hexagon pipe nuts. 5 N vs. UN. Size Thread Designation. Number of threads in 1" (= 25.4 cm) 11: 11: 11: 11: 11: 11: 11: Thread: G1 G1 1/8 G1 1/4 G1 3/8 G1 1/2 G1 3/4 G 2 Thread diameter mm: 33.249: 37.897: 41.910: 44.323: 47.803: 53.746: 59.614: Core diameter mm: 30.291: 34.939: 38.952: 41.365: 44.845: 50.788: 56.656: Number of turns in 1" (= 25.4 cm) 11: 11: 11: 11: 11: 11 . 3D Model / PCB Symbol. BSPP vs PF thread. Gevind. The square shank is compatible with tap wrenches and tap holders for drill presses and milling machines.. Plug-chamfer taps are a versatile choice for most tapping applications. NPT Thread Sizes. O-Ring Size2) O-Ring ID x section Retaining Ring Part No. In Stock: 118. L2 min. However, this thread, which is used for pressure gauges, requires a blind bore. Qty. BSP is BRITISH STANDARD PIPE THREAD- Also known as Whitworth 55 Thread Form. Fastener and Screw / Bolt Design, Formula and Calculations External Pipe Threads per. Example: 1/8 BSP parallel thread = G1/8 BSP Taper (BSPT): R followed by the denomination, according to standard ISO 7-1. (mm.) Ml. G = BSPP = BSPF = BSPM = PS . BSPP is BRITISH STANDARD PIPE PARALLEL . Change the Hole Tap Type to "Taper Tapped" and you should see the NPT option in Thread Type dropdown. BSPT is BRITISH STANDARD PIPE TAPER THREAD - Thread form per AS 1722.1, BS 21, ISO 7. @chadr619. Example: 1/8 BSP taper (BSPP) thread = R1/8 Female threads: BSP distinguishes between two types of threads. 10 UNJ vs. UN. Tillslutning. G-threads have a parallel shape in accordance with the DIN-EN-ISO 228-1 standard with flank angle 55o. Title: filete Author: User Created Date: Thread Dimensions - Imperial Thread Sizes Chart Here are two imperial thread sizes table defines thread dimensions of coarse threads (UNC/UNRC) and fine threads (UNF/UNRF). 6 STI Gage Before or After Inserted. For inch threads, however, the dimensions are given in inches. While it is possible to mix and match NPT and BSP in most applications if the right amount of dope is used, I would . H14 8 External Thread Internal Thread H 0.866025P= H1 =0.541266P d d2 d1 D2 D1 = = = d2 D d1 = = d-0.649519P d-1.082532P P 0 H H H H 30 60 30 Internal Thread 55 H 2 2 h 2 2 External Thread 25.4/n = = P = H n (Threads/inch) 0.960237P r 0.137278P= h =0.640327P P d1 or D1 d2 or D2 d or . (mm) EOlastic Seal (Type E) O-Ring and Retaining Ring (Types G & H)3 Bonded Washer Part No.4 Narrow Types . Mark Olenick said: What you got there is also know as British Standard Pipe thread. One is Parallel threads or we can say Straight threads. thread series designation: (UN, UNC, UNF, UNEF, UNS) The thread series is generally relative to the outside diameter of the screw. Employee. Lower deviation. External thread th. $7.94 previous price $7.94 8% off 8% off previous price $7.94 8% off. - The pipe size in the NPT thread sizes chart does . The metric thread sizes are generally expressed as M2 0.25, the thread diameter is 2mm and pitch is 0.25mm. These taps are made of uncoated high-speed steel and are for use on most metal and plastic. ISO 228-1, Pipe threads where pressure-tight joints are not made by the threads. These are parallel threads (BSPP), which have a constant diameter, which are known a G threads, and taper threads (BSPT), whose diameter increases or . 8 Unified National Thread: ANSI vs. BS vs. ISO vs. JIS. One class for internal thread (tap) Rc and Rp threads to ISO 7-1; NPT and NPSM to ANSI B1.20.1; NPTF and NPSF to ANSI B1.20.3; Tolerance positioning. Price. All taps are bottoming type manu-factured from high speed steel. JIS B0202 In Japan this thread is known as PF (also use prefix G) for the parallel thread. Thread Standards and End Connection Standards Many mechanical end connections have threads . Insiders usually use the points to refer to the thread size, one inch is equal to 8 points, 1/4 inch is 2 points, and so on. (mm.) Get it as soon as Monday, Aug 29. Standard slangenippel til slangeklemme. Sort Acending Sort Decending: Sort Acending Sort Decending: Sort Acending Sort Decending: Sort Acending . The plug and socket thread together to form a stronger connection than other quick-disconnect couplings. BSP is differs from NPT (National Pipe Thread) in that the pitch of the groves is different. For example, 8/16" or 1/2" equates to size -8 . (Threads per Inch) ISO 228, DIN 259, BS2779, JIS B0202 In Japan this thread is known as (PF) Use prefix G for parallel thread. GearWrench 1-3/8 in Size Wrench Sets, Craftsman 3/8 in Size Socket Wrenches 1 Pieces, Ratcheting 3/4 in Size Socket Wrenches 1 Pieces, With 3-5 chamfered cutting threads, they require moderate . #3. and nominal sizes . Thread conforms to ISO 228-1; Port conforms to ISO 1179; Pitch & diameter measured in inches e.g. Note: NPS (National Pipe Straight) is not to be confused with NPS (Nominal Pipe Size) which is an American set of standards for pipes. 9 UN vs. UNC vs. UNF vs. UNEF vs. UNS. Add threads to holes in preparation for installing helical inserts. NPT Although BSP is a foreign thread, it isn't metric. Take a look at where the threads are located. Shank Overall Dia. The below table gives the major and minor diameter for each BSP Trade Thread Size. EOlastic Seal (Type E) O-Ring and Retaining Ring1) (Types G & H) Bonded Washer Part No. Length Thread Size (in.) On a 3/4" diameter screw, 20 threads per inch is considered extra-fine: 3/4-20 UNEF. dimensions, and part numbers are subject to change without notice . Pitch P. Height of thread h. major d = D. pitch d2 = D2. part TUBE Male Pi L -rl Ll Size 0.18 028 . The thread sizes smaller than 1/8 inch and larger than 6 inches are occasionally used for specific purposes. Size Part No. For stainless steel, use the high value of the torque range of steel. These pipe threads are also known as Whitworth pipe threads. Czech Republic. Lower percentages such as "75% of the thread depth . 55 Degree Threads. United States. Low-Volume Rapid Injection Molding With 3D Printed Molds. G (supposedly from German/English "Gas") are the cylindrical pipe threads used on originally inch based pipes. L1 max. BRITISH STANDARD PIPE PARALLEL / BRITISH STANDARD PIPE TAPER. Pipe Thread Tap 1 G1/8 G3/4 G1/2 HSS Straight Flute Tap Tapping Repair Tool. G1x75 DIN 431. Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. G1/8 0.438 2 1/8 1/8-28 974242-G1/8 G1/4 0.563 2 7/16 1/4-19 974242-G1/4 G3/8 0.700 2 9/16 3/8-19 974242-G3/8 G1/2 0.688 3 1/8 1/2-14 974242-G1/2 G3/4 0.906 3 1/4 . So BSP scope included BSPP, BSPT, G, PF thread; BSPP, G and PF thread are the same. Size Part No. G (BSP / BSPP) thread is parallel with a 55 deg thread pitch and designed to seal with a Bonded washer seal (included with our fittings) or an O-ring face that may be . All taps are bottoming type manu-factured from high speed steel. British Standard Pipe (BSPP, BSPF) Thread Form r = Basic Radius = * 137329 p h = Basic Depth of Thread = *640327 p p = Pitch = 1/t.p.i. ACME, Buttress, STI and gages for other custom thread forms are also . All units in inches. $19.99. G 3/8" G 1/2" G 3/4" Female Thread G 1/8" G 1/4" G 3/8" G 1/2" G 3/4" 9.6 13.0 16.5 20.8 26.3 8.75 11.8 15.25 19.0 24.5 8.0 10.0 10.0 12.0 12.0 7.4 11.0 11.4 15.0 16.3 NPT THREAD CONNECTION . That is, the thread is made from a cylindrical surface. 11 UNR vs. UN. People usually used to call thread sizes, one inch equals eight points, and 1/4 inch is 2 points, and so on. $4.99. The thread form follows the British Standard Whitworth standard: Symmetrical V-thread in which the angle between the flanks is 55 (measured in an axial plane) One-sixth of this sharp V is truncated at the top and the bottom The threads are rounded equally at crests and roots by circular arcs ending tangentially with the flanks where r 0.1373 P 2020-01-16 01:51:07. The Manifold Center offers both G thread port manifolds and R thread port manifolds, which conform to the British standard pipe thread (BSP thread). Metric thread is 60 degrees equilateral side of the tooth type, the British thread is isosceles 55 degrees tooth type, US-made thread for the waist 60 degrees. ISO 228-1, Pipe threads where pressure-tight joints are not made by the threads. Report. Whitworth Pipe Threads are used almost exclusively by countries which are otherwise on the metric system . 4.3336. - Commonly used NPT thread sizes including 1/8, 1/4, 3/8, 1/2, 3/4, 1, 1+1/4, 1+1/2, 2, 2+1/2, 3, 4, 5, and 6 inches, can be found on most U.S pipes and fittings. For brass, use 70% of the torque value of steel. Fastener and Screw / Bolt Design, Formula and Calculations Internal Pipe Threads per. The tolerance width on a tap designed for a specific tolerance is much smaller than the tolerance width on the finished thread. NPT - National Pipe Thread - is the US standard. Most of the rest of the world uses BSP - British Standard Pipe. These pipe threads are also known as Whitworth pipe threads. $7.30. Male G-threads (cylindrical) can only be screwed into female G-threads. Standard thread gages are made to a Class X tolerance. Belleville, Illinois. in sizes 1/8" through 1 1/2". So BSPP is the same as PF. For example, your bushing could have a 3/8 male thread on one side and 1/4 female threads on the other. Letter drill G 1/8: 28: 0.383: 8.8 mm 8.4mm 11/32 inch: 21/64" 1/4: 19: 0.518: 11.8 mm: 11.2mm: 29/64" 7/16" 3/8: 19: 0.656: 15.25 mm . The internal (conical) pipe thread is is described as "GCon". The thread by a cylinder. G/R/Rp - Whitworth Pipe Threads (BSPP/BSPT) ISO 7-1 Pressure Tight Thread Joints Example - Typical designation for Thread according ISO 228 ISO 228 G 3 1/4" Torque range is normally calculated +/- 10%. Thread designation BSP Parallel (BSPP): G followed by the denomination, according to standard ISO 228-1. G thread G1/8 - 14 11 6.4 5 7 q3568 B-1/8 10 534213 B-1/8-100 100 CU/ZN/NI metals excluded q8142289 B-1/8-F1A2) 10 G1/4 - 18 15 9.8 6 15 q3569 B-1/4 10 55 degree Whitworth Thread Form. NPT has flattened peaks and troughs where BSP is rounded. The second one is the Taper Thread. x Section (mm) Retaining Ring Part Number G 1/8-28 9.9 15 17.2 1.0 8.5 ED10X1X 5-585 7.98 x 1.88 1/8 Retaining Ring D9DT-2 6.3 mm (1/4") Chart No 4 - British Standard Pipe Threads BSP Threads Dimensions in Inches except where stated Thread Form Data Tapping Drill Clearance Drill Diameter O/Diameter Core Pitch Depth Radius Effective Dia T.P.I Dec / Met / Frac Dec / Met / Frac 1/8" 0.3830 0.3370 0.0357 0.0229 0.0049 0.3601 28 0.3445 - 8.75mm 0.3858 - 9.80mm . For metric thread types, the dimensions are given in millimetres. D4 (mm.) Type of mounting External hex, spanner size 4.5 and slot 0.8 mm External hex, spanner size 7 Nominal tightening torque [Nm] 0.48 55% 1.33 20% Materials Pneumatic connection Male thread . See Detail. Couplers are female fittings with threads on both couplers.. Tees are couplers that join three sections of pipe or tubing. 7 STI Gage Tolerances. BSP fittings can be identified by completing a few calculations to find the thread size. The way to read an NPT size is the nominal inside diameter and the number of threads per inch. Thread Size Fitting Material Product Range . (mm) L in. But like we said, the G1/4" is the norm and the other sizes have become very rare. With Zinc plating always lubricate threads and seals. This is why it comes in imperial sizes: 1/8, 1/4, 1/2, 3/4, and so on. For example, a 3/4" NPT pipe thread has an outside diameter of 1.050 inches. High-Pressure Thread-Lock Quick-DisconnectHose Couplings for Hydraulic Fluid. In case you are tumbling through server solutions or some older water cooling gear, you might stumble upon G1/8" (9mm wide) or G3/8" (16.5mm wide) threads. British Standard Pipe BSP thread chart, BSP thread chart showing TPI and drill sizes. Male R-threads (conical) can be screwed into female G or R-threads. rishabh.bisht. Therefore, thread standards can be used to help define end connection standards . (in.) Disregard, I was looking under Threads instead of using the Hole tool. (mm) L2 min. Thread: B Female Connection Thread. The most common types of Whitworth thread are: BSPP (G) - British Standard Pipe Parallel BSPT (R/Rp) - British Standard Tapered Pipe, for pipes and tapered thread An appropriate sealing compound can be used in the thread to ensure a leakproof joint. 9/16 12 17/32 - - - - 5/8 11 35/64 14 53/64 - - 3/4 10 41/64 14 31/32 14 15/16 7/8 9 3/4 14 1-7/64 - - 1 8 55/64 11 1-13/64 11 1-11/64 1-1/4 7 1-3/32 11 1 . NPT has a thread angle of 60 where BSP is 55. New New New. minor d1 = D1. Each 1+ 3.47 4.16 5+ 3.19 3.83 10+ 3.02 . The NPT (US Standard) thread is tapered with a 60 deg thread pitch and designed to seal when the threads compress together, with pipe tape to fill in any minor leak paths. First, you'll need to identify whether the thread type is male or female. Report. Since metric measurements give the true sizes of a tube or a fluid pipe, dash numbers do not apply for them. Step 1 - Male Threads v. Female Threads. Follow this link for the dims. GlowShift 1/8 BSPT Male to 1/8-27 NPT Female Gauge Sensor Sender Thread Adapter Reducer. Features/Benefits: - Large Range & Flexibility Large selection of materials for excellent chemical compatibility: brass, steel, stainless steel, aluminium Surface treatment for increased corrosion resistance: nickel-plated brass or anodised aluminium Stainless steel for corrosive environments BSPP, BSPT, NPT and metric threads . G & H Part Number Parker O-Ring Size2 O-Ring I.D. Only 9 left in stock - order soon. So the G1/4 label is just the thread size label, which makes sure that your liquid cooling . There are two types of BSP Thread available. Drill Size (inch) Pitch (TPI) Drill Size (inch) Pitch (TPI) Drill Size* (inch) 1/16 60 0.046 (#56) 28 0.261 (G) - - 1/8 40 0.098 (#40) 28 11/32 28 21/64 1/4 20 0.196 (#9) 19 29/64 19 7/16 . 6" 6.625 8 8 6.585 6.452 4 7.025 6.7252 11 6.450 6.359 11 8" 8.625 8 10" 10.750 8 12" 12.750 8 ODM Outside Diameter of the Male IDF Inside Diameter of the Female TPI Threads per Inch GHT (3/4") 1.0625 ODM, 11 1/2 TPI NOTE: Female NPT (Tapered Pipe) thread is not availabe on hose swivel nuts. Thread Size (ISO 228-1) D3 (mm.) 1. Estimated manufacturer lead time is for quantities greater than shown above. G1/8 0.438 2 1/8 1/8-28974242-G1/8 G1/4 0.563 2 7/16 1/4-19974242-G1/4 G3/8 0.700 2 9/16 3/8-19974242-G3/8 G1/2 0.688 3 1/8 1/2-14974242-G1/2 G3/4 0.906 3 1/4 3/4 . G1/4-19; Parallel threads require o-ring, crush washer, gasket or metal to metal seal between connectinos for pressure tight . in sizes 1/8" through 1 1/2". ISO 228, DIN 259, BS2779 British Standard Pipe Parallel thread is called BSPP. Pipe threads refer to the following standards: G threads to ISO 228-1. But, to actually determine the size of a pipe, the outside diameter of each pipe or fitting must be measured and compared to the table for size identification. QS Series Male thread G1/8 port 1 connector . Number of threads in 25.4 mm. Metric system is used in metric system.British system for British thread. 1 inch corresponds to 25.4 mm. H in. $4.88. Gages may be purchased individually or as assemblies. Thus, G 1/4 per EN 837 is usually metallically sealed, even in front of the thread. Shank Overall Dia. Previous: The valves main application fields See Detail. This item: G 1/8" - 28 HSS BSP Parallel British Standard Pipe Tap. Nov 23, 2015.