Flat Head 82° Screw Style - The Thelen Channel

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Machine Screw Head Dimensions

Flat Head 82°

This style has a countersunk head with a flat top surface and a cone-shaped bearing surface with a head angle of approximately 82°. It is used in applications where protrusion of the fastener above the mating sufrace is unaccepttable. It also provides good centering possibilities.
This table references ANSI B18.6.3

Size	A		H		J		T		M	G	N	Phillips Driver Size
	Head Dimensions				Slot Dimensions				Recess Dimensions
	Diameter		Height		Width		Depth		Dia	Depth	Width
	Max	Min	Max	Min	Max	Min	Max	Min	Ref	Ref	Ref
0	.112	.096	.035	.026	.023	.016	.015	.010	.062	.035	.014	0
1	.137	.120	.043	.033	.026	.019	.019	.012	.070	.043	.015	0
2	.162	.144	.051	.040	.031	.023	.023	.015	.096	.055	.017	1
3	.187	.167	.059	.047	.035	.027	.027	.017	.100	.060	.018	1
4	.212	.191	.067	.055	.039	.031	.030	.020	.122	.081	.018	1
5	.237	.215	.075	.062	.043	.035	.034	.022	.148	.074	.027	2
6	.262	.238	.083	.069	.048	.039	.038	.024	.168	.094	.029	2
8	.312	.285	.100	.084	.054	.045	.045	.029	.182	.110	.030	2
10	.362	.333	.116	.098	.060	.050	.053	.034	.198	.124	.032	2
12	.412	.380	.132	.112	.067	.056	.060	.039	.262	.144	.035	3
1/4	.477	.442	.153	.131	.075	.064	.070	.046	.276	.160	.036	3

This page was last updated 04/24/06 10:38 AM 2013