Oval Head Self Tapping Screw Head Dimensions

**Slotted and Phillips Drive Oval Head Self Tapping Screws - ANSI B18.6.4 1998**
Nominal Size	A		H	O	J		T		M	R	N	F		G	Phillips Driver Size
	Head Diameter		Head Height		Slot Width		Slot Depth		Dimensions of Recess			Protrusion Above Gaging Diameter		Gaging Dia
	Head Diameter		Side	Total	Slot Width		Slot Depth		Dia	Depth	Width	Protrusion Above Gaging Diameter
	Max	Min	Max	Max	Max	Min	Max	Min	Ref	Ref	Ref	Min	Max
0	.112	.096	.035	.056	.023	.016	.030	.025	.068	.036	.014	.047	.031	.078	0
1	.137	.120	.043	.068	.026	.019	.038	.031	.070	.039	.015	.053	.035	.101	0
2	.162	.144	.051	.080	.031	.023	.045	.037	.106	.060	.018	.058	.039	.124	1
3	.187	.167	.059	.092	.035	.027	.052	.043	.118	.072	.019	.064	.044	.148	1
4	.212	.191	.067	.104	.039	.031	.059	.049	.130	.086	.019	.069	.048	.172	1
5	.237	.215	.075	.116	.043	.035	.067	.055	.152	.073	.028	.075	.053	.196	2
6	.262	.238	.083	.128	.048	.039	.074	.060	.172	.092	.030	.080	.057	.220	2
8	.312	.285	.100	.152	.054	.045	.088	.072	.186	.107	.031	.091	.066	.267	2
10	.362	.333	.116	.176	.060	.050	.103	.084	.202	.125	.033	.102	.075	.313	2
12	.412	.380	.132	.200	.067	.056	.117	.096	.264	.140	.038	.113	.084	.362	3
14	.462	.427	.148	.224	.075	.064	.132	.108	.282	.152	.039	.125	.093	.410	3
1/4	.477	.442	.153	.232	.075	.064	.136	.112	.284	.160	.040	.129	.095	.424	3
5/16	.597	.556	.191	.290	.064	.072	.171	.141	.384	.226	.065	.155	.117	.539	4
3/8	.717	.670	.230	.347	.094	.081	.206	.170	.404	.245	.068	.182	.139	.653	4
7/16	.760	.715	.223	.345	.094	.081	.210	.174	.416	.257	.070	.195	.150	.690	4
1/2	.815	.765	.223	.354	.106	.091	.216	.176	.430	.271	.071	.212	.163	.739	4

Slotted and Phillips Drive Undercut Oval Head Self Tapping Screws
ANSI B18.6.4 - 1998
Nominal Size	These Lengths or Shorter are Undercut		A		H	O		J		T		M	R	N	F		G	Phillips Driver Size
			Head Dimensions					Slot Dimensions				Recess Dimensions			Protrusion Above Gaging Diameter		Gaging Dia
			Diameter		Side Height	Total Height		Width		Depth		Dia	Depth	Width	Protrusion Above Gaging Diameter
	Type AB	Other Types	Max	Min	Ref	Max	Min	Max	Min	Max	Min	Ref	Ref	Ref	Max	Min
0	3/16	1/8	.112	.096	.025	.046	.033	.023	.016	.028	.022	.068	.036	.014	.047	.031	.078	0
1	3/16	5/32	.137	.120	.031	.056	.042	.026	.019	.034	.027	.070	.039	.015	.053	.035	.101	0
2	3/16	3/16	.162	.144	.036	.065	.050	.031	.023	.040	.033	.106	.060	.018	.058	.039	.124	1
3	7/32	7/32	.187	.167	.042	.075	.059	.035	.027	.047	.038	.118	.072	.019	.064	.044	.148	1
4	1/4	1/4	.212	.191	.047	.084	.067	.039	.031	.053	.043	.130	.086	.019	.069	.048	.172	1
5	1/4	1/4	.237	.215	.053	.094	.076	.043	.035	.059	.048	.152	.073	.028	.075	.053	.196	2
6	5/16	5/16	.262	.238	.059	.104	.084	.048	.039	.065	.053	.172	.092	.030	.080	.057	.220	2
7	3/8	3/8	.287	.262	.064	.113	.093	.048	.039	.071	.059	.176	.098	.030	.085	.062	.243	2
8	7/16	7/16	.312	.285	.070	.123	.101	.054	.045	.078	.064	.186	.107	.031	.091	.066	.267	2
10	1/2	1/2	.362	.333	.081	.142	.118	.060	.050	.090	.074	.202	.125	.033	.102	.075	.313	2
12	9/16	9/16	.412	.380	.092	.161	.135	.067	.056	.103	.085	.264	.140	.038	.113	.084	.362	3
1/4	5/8	5/8	.477	.442	.107	.186	.158	.075	.064	.119	.098	.284	.160	.040	.129	.095	.424	3
5/16	13/16	5/8	.597	.556	.134	.232	.198	.084	.072	.149	.124	.374	.214	.065	.155	.117	.539	4
3/8	-	5/8	.717	.670	.161	.278	.239	.094	.081	.179	.149	.394	.233	.068	.182	.139	.653	4
7/16	-	3/4	.760	.715	.156	.279	.239	.094	.081	.184	.154	.404	.245	.070	.195	.150	.690	4
1/2	-	3/4	.815	.765	.156	.288	.244	.106	.091	.204	.169	.416	.257	.071	.212	.163	.739	4

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Self Tapping Screws

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