Transcription of DetailsofStandardThreadForms
1 =[800-872-9329]. Details of Standard Thread Forms nom. basic basic basic basic reccommended size depth major effective minor tap drill of diameter diameter diameter size thread size Rp size G. inches inches inches inches inches mm mm ISO 228 1/16 28 1/8 28 (BSPP, BSPF) DIN 259 1/4 19 BS 2779 3/8 19 JIS B0202 1/2 14 5/8 14 3/4 14 7/8 14 1 11 1 1/4 11 1 1/2 11 1 3/4 11 In Japan this thread 2 11 is known as (PF) 2 1/4 11 NO SIZES OF. 2 1/2 11 (BRITISH. 2 3/4 11 STANDARD). 3 11 DRILLS ARE. Use prefix G for 3 1/4 11 RECCOMMENDED. parallel thread. 3 1/2 11 IN 1157:1975. 3 3/4 11 FOR THIS. example: G1/2 = threadsperinch 4 11 RANGE. nom. basic basic diameters at reccmd. ISO 7 size depth gauge plane* tap drill DIN2999 of major effective minor size thread diameter diameter diameter BS 21 inches inches inches inches inches mm (BSPT) JIS B0203 h 1/16 28 1/8 28 1/4 19 3/8 19 1/2 14 3/4 14 1 11 1 1/4 11 Use prefix R for 1 1/2 11 In Japan this thread taperedthread.
2 Taper 1 in16ondiameter 2 11 is knownas(PT) example: R1/2 (shown exaggeratedindiagram) 2 1/2 11 nom. basic outside effective basic reccmd. size depth diameter diameter minor tap drill of of at small end diameter size thread pipe of external thread inches inches inches inches inches mm 1/16 27 1/8 27 1/4 18 3/8 18 1/2 14 3/4 14 1 11 1/2 Taper 1 in16ondiameter 1 1/4 11 1/2 (shownexaggerated indiagram) 1 1/2 11 1/2 2 11 1/2 2 1/2 8 designation basic basic basic reccmd. clear- STEEL CONDUIT THREAD major pitch minor tap ance (Pg) (DIN 40430) diameter diameter diameter drill drill size size (PANZERROHR-GEWINDE) r P mm mm mm mm mm Pg7 20 Pg is the Continental Pg9 18 European electrical conduit 80o H H1. Pg11. Pg14. 18. 18. thread. (FortheUK,the Pg16 18 electrical thread now Pg21 15 in use is Metric fine.)
3 Pg29 16 Pg36 16 Metric Pitch P= r = Pg42 16 tpi H1 = H H = P Pg48 16 Mail to: BOX 261, OWINGS MILLS, MARYLAND 21117. TECH2. 2 P11K. Warehouse: 6119 OAKLEAF AVENUE, BALTIMORE, MARYLAND 21215.
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