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Q 421

Plain Washers for Tapping Screw and Washer Assemblies - Type N

Q 421B (N) N型平垫圈用于自攻螺钉和垫圈组合件

See all versions and complete specifications: Plain Washers for Tapping Screw and Washer Assemblies - Type N — Full Specification Page

Dimensional Specifications — Q 421 (mm)

Size	P	k_max	k_min	s_max	s_min	k_nominal	ds_nominal
ST2.9	3	1	1.06	3.1	8	7.64	0.94
ST3.5	4	1	1.06	4.12	10	9.64	0.94
ST4.2	5.4	1.6	1.68	5.52	14	13.57	1.52
ST4.8	7.15	1.6	1.68	7.3	16	15.57	1.52

Related Standards

GB /T 97.4 (S) - 2002— Plain Washers (Small) for Combination Screw GB /T 97.4 (N) - 2002— Plain Washers (Normal) for Combination Screw GB /T 97.5 (N) - 2002— Plain Washers for Tapping Screw and Washer Assemblies - Type N GB /T 97.5 (L) - 2002— Plain Washers for Tapping Screw and Washer Assemblies - Type L GB 9074.24 - 1988— Plain Washers for Assembly GB 9074.25 - 1988— Blg Plain Washer for Assembly GB 9074.29 - 1988— Samll Washer for Tapping Screw Assembly GB 9074.30 - 1988— Blg Washer for Tapping Screws Assembly

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