Flat Head Self Drilling w/ Wings -Zinc Plated

Phillips Flat Head Self Drilling Screws w/ Wings
Zinc Plated Steel

Also referred to as a Header TEK Screw and used to fasten wood to steel.
Wings ream the hole larger than the threads so the threads will not engage the wood.
Wings break off when they hit the steel, then the threads engage.

Size	Phillips Drive	Point	Drilling Capacity	Wood Thickness
12-24 x 2	#3	#4	.110 – .250	1/2” – 1*1/8”
12-24 x 2-1/4	#3	#4	.110 – .250	1/2” – 1-1/4”
12-24 x 2-1/2	#3	#4	.110 – .250	1/2” – 1-1/2”
12-24 x 2-3/4	#3	#4	.110 – .250	1/2” – 1-3/4”
12-24 x 3-1/2	#3	#4	.110 – .250	1/2” – 2-1/2”
12-24 x 4	#3	#4	.110 – .250	1/2” – 3”
1/4-20 x 2-3/4	#3	#4	.110 – .375	3/4” – 1-3/4”
1/4-20 x 3	#3	#4	.110 – .375	3/4” – 2”
1/4-20 x 3-1/4	#3	#4	.110 – .375	3/4” – 2-1/4”
1/4-20 x 3-1/2	#3	#4	.110 – .375	3/4” – 2-1/2”
1/4-20 x 3-3/4	#3	#4	.110 – .375	3/4” – 2-3/4”