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Thread Pitch

SRK Industries Middle East – presents its Product Standard Thread Pitch Chart, with the flexibility to offer fine thread pitch options based on customer requirements.

Coarse Thread Series - UNC Fine Thread Series - UNF 8-Thread Series - 8UN Metric Pitch
Nominal Size and Threads Per In. Nominal Size and Threads Per In. Nominal Size and Threads Per In. Metric Coarse Threads
1⁄4 - 20 1⁄4 - 28 -- M5 - 0.8
5⁄16 - 18 5⁄16 - 14 -- M6 - 1
3⁄8 - 16 3⁄8 - 24 -- M7 - 1
7⁄16 - 14 7⁄16 - 20 -- M8 - 1.25
1⁄2 - 13 1⁄2 - 20 -- M9 - 1.25
9⁄16 - 12 9⁄16 - 18 -- M10 - 1.5
5⁄8 - 11 5⁄8 - 18 -- M11 - 1.5
3⁄4 - 10 3⁄4 - 16 -- M12 - 1.75
7⁄8 - 9 7⁄8 - 14 -- M14 - 2
1 - 8 1 - 12 1 - 8 M16 - 2
11⁄8 - 7 11⁄8 - 12 1 1⁄8 - 8 M18 - 2.5
11⁄4 - 7 11⁄4 - 12 11⁄4 - 8 M20 - 2.5
13⁄8 - 6 13⁄8 - 12 13⁄8 - 8 M22 - 2.5
11⁄2 - 6 11⁄2 - 12 11⁄2 - 8 M24 - 3
-- -- 15⁄8 - 8 M27 - 3
13⁄4 - 5 -- 13⁄4 - 8 M30 - 3.5
-- -- 17⁄8 - 8 M33 - 3.5
2 - 41⁄2 -- 2 - 8 M36 - 4
21⁄4 - 41⁄2 -- 21⁄4 - 8 M39 - 4
21⁄2 - 4 -- 21⁄2 - 8 M42 - 4.5
23⁄4 - 4 -- 23⁄4 - 8 M45 - 4.5
3 - 4 -- 3 - 8 M48 - 5
31⁄4 - 4 -- 31⁄4 - 8 M52 - 5
31⁄2 - 4 -- 31⁄2 - 8 M56 - 5.5
33⁄4 - 4 -- 33⁄4 - 8 M60 - 5.5
4 - 4 -- 4 - 8 M64 - 6
-- -- -- M68 - 6
-- -- -- M72 - 6
-- -- -- M80 - 6
-- -- -- M90 - 6
-- -- -- M100 - 6