Hex Washer Head
Trilobe Thread Forming Screw
Inch

Dimensions refer to ASME B18.6.4 and Taptite Alternative

Nominal Size	S		e	k		d2		c		d1
	Width Across Flats		Width Across Corners	Head Height		Washer Diameter		Washer Thickness		Diameter of Circumscribing Circle		Measurement Across Center
	Max	Min	Min	Max	Min	Max	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	0.115	0.111	0.110	0.106
6	0.250	0.244	0.272	0.093	0.080	0.328	0.302	0.025	0.015	0.141	0.135	0.135	0.129
8	0.250	0.244	0.272	0.110	0.096	0.348	0.322	0.031	0.019	0.167	0.161	0.161	0.155
10	0.312	0.305	0.340	0.120	0.105	0.414	0.384	0.031	0.019	0.194	0.188	0.186	0.180
12	0.312	0.305	0.340	0.155	0.139	0.432	0.398	0.039	0.022	0.220	0.214	0.212	0.206
14	0.375	0.367	0.409	0.190	0.172	0.520	0.480	0.050	0.030	0.255	0.249	0.245	0.239
1/4	0.375	0.367	0.409	0.190	0.172	0.520	0.480	0.050	0.030	0.255	0.249	0.245	0.239
5/16	0.5	0.489	0.545	0.23	0.208	0.676	0.624	0.055	0.035	0.318	0.312	0.307	0.301
3/8	0.562	0.551	0.614	0.295	0.270	0.780	0.720	0.063	0.037	0.381	0.375	0.369	0.363

Tolerance on Length	Nominal Screw Size	Nominal Screw Length
		To 3/4”Incl.	Over 3/4”to 1.5”Incl	Over 1.5”
	All Diameters	-0.03	-0.05	-0.06

Material:
Steel: 1018-1022/10B21 carbon steel + hardened + zinc plated CR3 + Dehydrogenation
Stainless steel: A2 (304)(18-8) + passivated

Shanghai Screwtool is a long-standing OEM supplier who has served US and Europe fastener industry for over 20 years.
If you have regular demands for screws and fasteners, we recommend that you can contact us directly (info@shscrewtool.com) for economic offer and complete service.

Weight	N/A
Material	Steel 10B21/1022
Finishing	Zinc plated CR3+
SKU	STTRIHW-001

10-24×1-1/4 Hex Washer Head Trilobe Screw Steel Zinc

For detail shipping instructions, please check Delivery Guide.

Hex Washer Head Trilobe Thread Forming Screw Inch

Shanghai Screwtool is a long-standing OEM supplier who has served US and Europe fastener industry for over 20 years. If you have regular demands for screws and fasteners, we recommend that you can contact us directly (info@shscrewtool.com) for economic offer and complete service.

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Hex Washer Head
Trilobe Thread Forming Screw
Inch

Shanghai Screwtool is a long-standing OEM supplier who has served US and Europe fastener industry for over 20 years.
If you have regular demands for screws and fasteners, we recommend that you can contact us directly (info@shscrewtool.com) for economic offer and complete service.