BRITISH GAGES BA SCREW THREAD GAGES BSPT TAPER SCREW PLUG AND RING GAGES TO BS93 & BS 919 TO BS21 & ISO 7/2 1982 Gages for testing pipe threads where pressure PLUGS & RINGS TO NORMAL CLASS ALSO AVAILABLE tight joints are made on the threads to BS 21: AVAILABLE AS: FOR ISO 7/2 2000 1985, and ISO 7/2 1982. · End only Go or NoGo Screw Plug AVAILABLE AS: · Double End Go or NoGo Screw Plug w/handle · Taper Screw "Rc" Plug BS 21 specifies requirements of pipe threads for · Screw Ring Gage Go or NoGo · Taper Screw "R" Ring · Taper Plain Plug joints made pressure tight by the mating of threads, CALL FOR PRICES Gages for testing threads and are taper external, taper internal, parallel exter- CALL FOR PRICES SIZES having a full form BA SIZES nal and parallel internal threads. BA profile are manufactured to 1/16 X 28 0 BS 93: 1951, and BS 919: The thread form is based on the Whitworth profile. 1/8 X 28 1 Part 2: 1971. The taper is 1:16 on diameter, normal to the axis. 1/4 X 19 2 3/8 X 19 3 BS 93 specifies basic infor- Please note that ISO-7-2:2000(E) specifies that the 1/2 X 14 4 mation for the British external taper product thread is gauged by using a 5/8 X 14 Association thread form, and 5 parallel full form threaded ring gage and a tapered 3/4 X 14 tabulates diameters for plain ring gage respectively. 6 1 X 11 threads from 0BA to 25BA. 7 1.1/8 X 11 ISO 7/2 are different in design and have different 8 1.1/4 X 11 gage manufacture limits than BS21. 9 1.1/2 X 11 10 2 X 11 2.1/2 X 11 3 X 11 s 3.1/2 X 11 H = 1.1363365 x p r 4 X 11 47.5º r º 23.7 r = .1808346 x p 3.75 h H H h 5º 5 X 11 2 r 27.5º 27.5º h = 0.6 x p r 6 X 11 s = 2681683 x p s Pitch p 90º Axis of screw p BSF & BSW SCREW THREAD GAGES BSP SCREW THREAD GAGES TO BS2779* ALSO TO DIN 228 TO BS84 & BS 919 Gages for testing parallel threads RING GAUGE PRICES ARE FOR CLASS A OR B PLUGS & RINGS TO MEDIUM CLASS EXCEPT WHERE MARKED # having a full form Whitworth AVAILABLE AS: AVAILABLE AS: profile are manufactured to · End only Go or NoGo Screw Plug · End only Go or NoGo Screw Plug BS 84: 1956, and BS 919: · Double End Go or NoGo Screw Plug · Double End only Go & NoGo Screw Plug Part 2: 1971. 47.5º · Double End Style A Setting Plug · Screw Ring Gauge Go or NoGo 2 .75º 3.75º · Screw Ring Gauge Go or NoGo 23 CALL FOR PRICES BS 84 specifies basic information CALL FOR PRICES SIZES for the Whitworth form, and tabu- SIZES G1/8 X 28 lates diameters for threads desig- BSF BSW G1/4 X 19 nated BSW and BSF. 1/8 X 40 G3/8 X 19 3/16 X 32 3/16 X 24 G1/2 X 14 BSW is a coarse thread series from 1/4 X 26 1/4 X 20 G5/8 X 14 1/8" to 6" diameter. 5/16 X 22 5/16 X 18 G3/4 X 14 3/8 X 20 3/8 X 16 BSF is a fine thread series from G7/8 X 14 7/16 X 18 7/16 X 14 3/16" to 3" diameter. G1 X 11 1/2 X 16 1/2 X 12 G1.1/8 X 11 9/16 X 16 9/16 X 16 G1.1/4 X 11 5/8 X 14 5/8 X 11 H G1.1/2 X 11 6 3/4 X 12 3/4 X 10 G2 X 11 r 7/8 X 11 7/8 X 9 G2.1/2 X 11 1 X 10 1X8 h 27.5º 27.5º H G3 X 11 1.1/8 X 9 1.1/8 X 7 G3.1/2 X 11 r 1.1/4 X 9 1.1/4 X 7 G4 X 11 H 1.3/8 X 8 1.3/8 X 6 G5 X 11 6 1.1/2 X 8 1.1/2 X 6 G6 X 11 Pitch p H * In March 2003 the British Standards Institute H = 0.960491p = 0.160082p _ 6 withdrew BS-2779 and replaced it with ISO-228 2 h = _ H= 0.640327p r = 0.137329p (technically BS-EN-ISO-228). This statement is 3 that all requirements for BS-2779 will now be filled with ISO-228 11 Thread Check,Tel:631-231-1515 Fax:631-231-1625 Toll-Free:Tel:800-767-7633 Fax:800-767-2034 www.threadcheck.com Email: info@threadcheck.com