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BS 1981 - 1991

Recessed Raised Countersunk Head Machine Screws

BS 1981 - 1991 米字槽半沉头螺钉Table8

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Dimensional Specifications — BS 1981 - 1991 (mm)

Size	P	k_max	k_min	s_max	s_min	k_nominal	ds_nominal
2#	0.199	0.109	0.067	0.171	0.059	1	0.057
4#	0.332	0.183	0.107	0.292	0.1	2	0.089
5#	0.438	0.261	0.133	0.389	0.132	3	0.115
6#	0.635	0.373	0.205	0.568	0.191	4	0.187
8#	0.762	0.398	0.231	0.685	0.23	4	0.213

Related Standards

GB /T 820 - 2015— Raised Countersunk Head Screws with Cross Recess GB /T 820 - 2000— Raised Countersunk Head Screws (Common Head Style) with Cross Recess GB /T 13806.1 (C) - 1992— Cross Recessed Raised Countersunk Head Screws for Fine Mechanics GB 820 - 1985— Cross Recessed Raised Countersunk Head Screws GB 974 - 1976— 120° Cross Recessed Raised Countersunk Screws DIN 966 - 1990— Cross Recessed Raised Countersunk Head Screws DIN 6929 (NE) - 2013— Raised Countersunk Head Screws ISO 7047 - 2011— Rasied Countersunk Head Screws(Common Head Style) ，Grade A

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