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SAE J 531

Hexagon Inside Head Pipe Plugs(NPTF)

SAE J 531 (130109C) - 2020 六角头螺堵(NPTF螺纹)

See all versions and complete specifications: Hexagon Inside Head Pipe Plugs(NPTF) — Full Specification Page

Dimensional Specifications — SAE J 531 (mm)

Size	P	e	r	k_max	k_min	s_max	s_min	ds_max	ds_min	k_nominal	ds_nominal
1/4	14	0.72	18.3	0.627	11.94	18.03	0.710	14.2	0.56	15.93	0.470
1/8	18	0.36	9.1	0.440	8.51	13.34	0.525	7.9	0.31	11.18	0.335
3/8	11-1/2	0.93	23.6	0.815	13.72	22.10	0.870	19	0.75	20.70	0.540
1/16	27	—	—	0.283	6.48

Related Standards

GB 1152 - 1989— Straight Hydraulic Grease Nipples GB /T 14383 (HHP) - 2021— Forged Threaded Pipe Fittings - Hexagon Head Screw Plug GB /T 2878.4 (PLEH) - 2011— Connections for Hydraulic Fluid Power－ Ports and Stud Ends with Metric Threads and O-ring Sealing - Part 4 : Hex Plugs GB /T 14780 - 2010— Earth-moving Machinery - Drain, Fill and Level Plugs, Type B GB /T 14780 - 2010— Earth-moving Machinery - Drain, Fill and Level Plugs, Type D GB /T 25618.1 - 2010— Earth-moving Machinery - Lubrication Fittings - Part 1 : Nipple Type GB /T 14383 (HHP) - 2008— Forged threaded pipe fittings - Hexagon head screw plug GB /T 19674.2 - 2005

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