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JIS B 1258

Plain Washers for Screw and Washer Assemblies - Type N

JIS B 1258 (N) - 2012 平垫圈用于螺钉和垫圈组合件(N型)

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Dimensional Specifications — JIS B 1258 (mm)

Size	P	k_max	k_min	s_max	s_min	k_nominal	ds_nominal
2	2.25	0.6	0.65	2.35	6	5.7	0.55
3	4.55	1	1.06	4.67	10	9.64	0.94
4	11	2.5	2.6	11.27	24	23.48	2.4
2.5	3.2	0.8	0.85	3.32	8	7.64	0.75
3.5	7.4	1.6	1.68	7.55	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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