We have some of the most efficient and innovative laboursaving devices to simplify tasks for you. These series are obsolete but in current production. Fastenerdata bsw threads british standard whitworth. Manufactured from tungsten steel, much harder than cheap carbon steel sets. British whitworth tools catalog page samstag sales. The whitworth thread system was later to be adopted as a british standard to become british standard whitworth. This would include bsw british standard whitworth, bsf british standard fine, bsp british standard pipe and ba british association. Although written for a british motorcyle audience, this also applys to many earlier british cars. It was used on general brass work, gas fittings and brass tubing. You can read some history about sir joseph whitworth and his many inventions on wikipedia. Whitworth tapered pipe thread din 2999 bspt british standard. Most popular british standard taps listed here can be manufactured and shipped within 12 business days. Tobeusedforidentificationofthethreemostcommonthreadsystems.
Bsw threads, british standard whitworth fastener thread bs 84 1956. British standard fine thread series parallel, cylindrical. British standard brass for which there is no british standard is based upon the whitworth thread form with all diameters having 26 threads per inch tpi. Microscopes use standard interchangeable items with british microscope society thread which is a whitworth format. British threaded fasteners tools b255 threads ba british association standard bsw british standard whitworth coarse bsf british standard fine british hex nuts and jam nuts british socket drivers spaenaur whitworth no. Whitworth pipe thread din iso 228 bsp british standard. British thread british standard whitworth coarse pitch. Whitworth and other british threads jrc engineering, inc. This standard specifies the requirements for hexagon bolts and screws with british standard whitworth bsw thread in diameters from 14in to 2 in inclusive and nuts with bsw thread in diameters from 14in to 6 in inclusive. Bspp is british standard pipe parallel thread thread form per as 1722. You can use the size table on this page to find the size of the whitworth tool you need. Ba or british association, a coarse thread series known as bsw or british standard whitworth. British standard whitworth wikipedia republished wiki 2. Bspt rrp british standard tapered pipe, for pipes and.
Parallel female thread and tapered male thread taper 1. If you wish to upgrade your automotive tool kit, browse through our range of product. Bspt is british standard pipe taper thread thread form per as 1722. British standard whitworth thread synonyms, british standard whitworth thread pronunciation, british standard whitworth thread translation, english dictionary definition of british standard whitworth thread. The thread pitch increases with diameter in steps specified on a chart. Whitworth coarse thread bs 84 bsw british standard whitworth british standard whitworth coarse thread series parallel, cylindrical in. Threads are taper external, parallel internal or taper internal and are intended for use with pipes suitable for threading and for valves, fittings or other. The name of the thread was understandably eponymous, although its full name was british standard whitworth. Presented by the british engineering standards association, bsf was identical to the original whitworth form except that the pitch was finermeaning.
British standard whitworth thread bsw thread the whitworth thread was the worlds first national screw thread standard devised and specified by joseph whitworth in 1841. Some of the parts will require whitworth bsw, bsf or ba threads, none of these are listed within inventor 2009, could someone help as to where and how to get the threads. The information contained herein is for reference only in the. The fine thread, which is widespread in the britisch machine tool industry, is superseded by the american unf thread.
British standard pipe bsp technical standards for screw threads that has been adopted internationally for interconnecting and sealing pipes and fittings by mating an external thread with an internal female thread. Whitworth fine thread bs 84 bsf threads british standard fine. The whitworth british thread standard is obsolete and not in use as a standard for new products. Bsp british standard pipe specifications of international thread standards. Whitworth and other british threads jrc engineering. An appropriate sealing compound can be used in the thread to ensure a leakproof. British standard whitworth bsw is an imperialunitbased screw thread standard. The whitworth thread system was later to be adopted as a british standard to become british standard whitworth bsw. You need the whitworth size tools to work on your old austin, rollsroyce, jaguar, mg, bsa or other old british made automobile or motorcycle.
It was reproduced on the british cars list with permission from the author charles falco. Both internal and external threads are parallel threads. The pitch is the reciprocal of the number of threads per inch. The usa rapidly followed with the sellers thread with a 60 degree angle slightly different from the whitworth 55 degree angle. British standard pipe thread bsp thread chart apollo. Bsw british standard whitworth thread autodesk community.
Thread geometry british standard whitworth bsw all dimensions in inches unless otherwise stated. Major major tapping diameter diameter drill size inch mm mm w 116 116 1,588 1,05 60 0,423 w 332 332 2,381 1,70 48 0,529 w 18 18 3,175 2,36 40 0,635. I suspect telescopes and other optical items also follow the standard as they were early adopters of standard threading and likely therefore to be late chnagers to other more recent standards. It is used in many types of engineering throughout the world, although in britain its use is now being superseded by the iso metric system. Until then, the only standardization was what little had been done by individual people and companies, with some companies inhouse standards spreading a bit within their. British standard whitworth wikipedia, the free encyclopedia.
Samstag sales can supply you with a small range of. Bsw british standard whitworth a coarse thread devised and standardised at manchester in 1841 by british engineer sir joseph whitworth 1803 87. Kodiak usa british standard whitworth thread taps these british standard taps are usually in stock, but may require additional transit time beyond the standard 12 day shipping window. Chip coakley the jericho press emailed me with the serial number on his no. British standard pipe thread, with sealant compound. I suspect telescopes and other optical items also follow the standard as they were early adopters of standard threading and likely therefore to be. British standard whitworth thread definition of british. The information contained herein is for reference only in the application of spare and replace parts on existing products and equipment. Whitworth pipe thread din iso 228 bsp british standard pipe.
The tap drills suggested below are for, roughly, a full thread. Chart no 2 british standard fine bsf threads british standard fine threads 55 deg thread angle dimensions in inches except where stated thread form data tapping drill clearance drill diameter odiameter core pitch depth radius effective dia t. British standard taps british standard whitworth thread. Apr 27, 2011 this will likely be of interest to owners of british built vandercooks. Pd16 for single stage engines and pd18 for two stage engines, both of which used u. Chrome vanadium steel plated and polished,very good quality. Fastener thread designations and definitions pitch, minor, major diameters. We strive to extend a satisfying experience to our customers. Bsw british standard whitworth thread hi, i am drawing up some parts for a friend which come from a 1930s automobile. Ideal for creating, repairing and cleaning up of bsf and bsw threads. The whitworth system was used as proposed for bolts and screws from 18.
The whitworth standard was created by an englishman named joseph whitworth in 1841. To buy whitworth tools see our whitworth tool web page. Bspt british standard pipe taper bspp british standard pipe parallel npt national pipe taper nps national pipe straight while the actual specified outside diameters of american national pipe differ slightly from those of british standard pipe, either thread may reliably be cut onto a pipe of its respective trade size. Five spanners sizes, 18,316,14,516 and 38 inch bsw. Whitworth is an old british standard for screw threads and sizes. Bspp g british standard pipe parallel and bspt rrp british standard tapered pipe for pipes and tapered threads grrp sponsored links the whitworth thread specifies a 55 thread angle and a thread depth of 0. Bsp is british standard pipe thread also known as whitworth 55 thread form. British standard pipe thread, with sealant compound parallel, cylindrical, external g. British standard whitworth thread bsw thread chart. Thread data bsw british standard whitworth thread dimensions coarse thread series bsw n erna external internal medium class a dimensions in inches external medium class b dimensions in inches minor diameter max. Whitworth coarse thread bs 84 bsw threads british standard. Set british standard whitworth combination spanners made in england. Bspp thread dimensions calculator shows dimensions, tolerances and designation for fastening pipe threads for thread sizes from 116 to 6 according to iso 228 1 standard.
Whitworths new standard specified a 55 thread angle and a thread depth of 0. Whitworth thread design was the first thread standard in the world. The whitworth thread system was later to be adopted as a. The whitworth spannershave a polished finish and are sure to serve you for years to come. British whitworth tools and british standard size reference table. Thread major diameter thread per inch pitch diameter minor diameter male thread. British standard whitworth thread bsw thread chart apollo. Bsw and bsf are the thread selections for commercial screws and nuts. May 02, 2014 1118 british standard whitworth wikipedia, the free encyclopedia en. It has been adopted as standard in plumbing and pipe fitting, except in north america, where npt and related threads are used. Threadsperinch ba bsw bsf bsp bspt 22 254 21 231 20 214 19 18112 18. Whitworth tapered pipe thread din 2999 bspt british.
Oct 01, 2014 british standard whitworth bsw is one of a number of imperial unit based screw thread standards which use the same hexagonal bolt head and nut sizes, the others being british standard fine. He also invented the whitworth sharpshooters rifle that saw use by the confederates in the american civil war. Chart no 1 whitworth threads whitworth form threads 55 deg thread angle dimensions in inches except where stated thread form data tapping drill clearance drill diameter odiameter core pitch depth radius. British standard whitworth bsw these are the original, 19th century, coarsethreaded industrial bolts designed to hold locomotives together. Whitworth tapered pipe thread din 2999 bspt british standard tapered pipe specifications of international thread standards whitworth tapered pipe thread whitworth pipe thread for pipes and fittings. Threading tableswhitworth, bsf, etc gerards garage. The reason for the two sizes goes back to the industrial revolution to be exact the year 1841 because in that year joseph whitworth introduced the first standard thread to avoid confusion in britains burgeoning engineering industry. The thread form follows the british standard whitworth thread. Because of their coarse pitch, they are more prone to vibrating loose, so are little used on motorcycles. A lecture on the meaning of whitworth first, a tiny bit of history. Bspt british standard pipe taper bspp british standard pipe parallel npt national pipe taper nps national pipe straight while the actual specified outside diameters of american national pipe differ slightly from those of british standard pipe, either thread. For example a 14w wrench is the same size as a 516bs british standard wrench, and it is.
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