12 X 2 1/2 HEX HEAD SELF TAPPING SCREW WITH WASHER, PLATED

Dimensional SpecificationsType A Hex Head Self Tapping Screw

ASME B18.6.3-2013
Nominal Size or Basic Screw Diameter		Threads per Inch	D		d		Drill Size	Recommended Hole Diameter
			Major Diameter		Minor Diameter
			Max	Min	Max	Min
#0	0.060	40	0.060	0.057	0.042	0.039
#1	0.073	32	0.075	0.072	0.051	0.048
#2	0.086	32	0.088	0.084	0.061	0.056	#48	0.0760
#3	0.099	28	0.101	0.097	0.076	0.071	#46	0.0810
#4	0.112	24	0.114	0.110	0.083	0.078	#44	0.0860
#5	0.125	20	0.130	0.126	0.095	0.090	#36	0.1065
#6	0.138	18	0.141	0.136	0.102	0.096	#32	0.1160
#7	0.151	16	0.158	0.152	0.114	0.108	#30	0.1285
#8	0.164	15	0.168	0.162	0.123	0.116	#29	0.1360
#10	0.190	12	0.194	0.188	0.133	0.126	#21	0.1590
#12	0.216	11	0.221	0.215	0.162	0.155	3/16	0.1875
#14	0.242	10	0.254	0.248	0.185	0.178	7/32	0.2165

1. Tolerance on Length: Up to 1" incl.: +/- 0.03. Over 1": +/- 0.05.
2. All dimensions are in inches.

ASME B18.6.3-2013
Nominal Size	A		W	H		F		U
	Width Across Flats		Width Across Corners	Height of Head		Diameter of Washer		Thickness of Washer
	Max	Min	Min	Max	Min	Max	Min	Max	Min
#4	0.188	0.181	0.202	0.060	0.049	0.243	0.225	0.019	0.011
#6	0.250	0.244	0.272	0.093	0.080	0.328	0.302	0.025	0.015
#7	0.250	0.244	0.272	0.093	0.080	0.328	0.302	0.029	0.017
#8	0.250	0.244	0.272	0.110	0.096	0.348	0.322	0.031	0.019
#10	0.312	0.305	0.340	0.120	0.105	0.414	0.384	0.031	0.019
#12	0.312	0.305	0.340	0.155	0.139	0.432	0.398	0.039	0.022
#14	0.375	0.367	0.409	0.190	0.172	0.520	0.480	0.050	0.030

1. All dimensions are in inches.

Dimensional SpecificationsNeo-EPDM Washers Used With Self Drilling Screws

1. NOTE: There is no single standard for Neo-EPDM dimensions. These values are offered as a guide; deviations from these specifications may occur.
2. All dimensions are in inches.