Tri-Wing^®
Economical Tri-Wing^® tamper-resistant screws are the common choice for high volume assembly operations while offering a minimal degree of security. Machine & sheet metal screws are offered in a Pan-Head design and Opsit^TM reverse thread.

We also carry a large range of drivers and bits specific to each type of security screw. Choose the correct size of Tri-Wing security screws below, as well as the driver or bit to accompany them.

PAN HEAD / SHEET METAL SCREWS SIZE PART NO. #4AB X 3/8 PAN HD TRI-WING SMS, 18-8 SS 3.4AB38PS #4AB X 3/4" PAN HD TRI-WING SMS, 18-8 SS 3.4AB34PS #4AB X 1/2 PAN HD TRI-WING SMS, 18-8 SS 3.4AB12PS #6A X 1/2 PAN HD TRI-WING SMS, 18-8 SS 3.6A12PS #6A X 3/4 PAN HD TRI-WING SMS, 18-8 SS 3.6A34PS #6A X 1 PAN HD TRI-WING SMS, 18-8 SS 3.6A1PS #6A X 1-1/4 PAN HD TRI-WING SMS, 18-8 SS 3.6A114PS #6A X 1-1/2 PAN HD TRI-WING SMS, 18-8 SS 3.6A112PS #8A X 1/2 PAN HD TRI-WING SMS, 18-8 SS 3.8A12PS #8AB X 5/8 PAN HD TRI-WING SMS, 18-8 SS 3.8AB58PS #8A X 3/4 PAN HD TRI-WING SMS, 18-8 SS 3.8A34PS #8A X 1 PAN HD TRI-WING SMS, 18-8 SS 3.8A1PS #8A X 1-1/4 PAN HD TRI-WING SMS, 18-8 SS 3.8A114PS #8A X 1-1/2 PAN HD TRI-WING SMS, 18-8 SS 3.8A112PS #10A X 1/2 PAN HD TRI-WING SMS, 18-8 SS 3.10A12PS #10A X 3/4 PAN HD TRI-WING SMS, 18-8 SS 3.10A34PS #10A X 1 PAN HD TRI-WING SMS, 18-8 SS 3.10A1PS

PAN HEAD / MACHINE SCREWS SIZE PART NO. 6-32 X 1/4 PAN HD TRI-WING MS, 18-8 SS 3.63214PS 6-32 X 3/8 PAN HD TRI-WING MS, 18-8 SS 3.63238PS 6-32 X 1/2 PAN HD TRI-WING MS, 18-8 SS 3.63212PS 6-32 X 3/4 PAN HD TRI-WING MS, 18-8 SS 3.63234PS 6-32 X 1 PAN HD TRI-WING MS, 18-8 SS 3.6321PS 8-32 X 3/8 PAN HD TRI-WING MS, 18-8 SS 3.83238PS 8-32 X 1/2 PAN HD TRI-WING MS, 18-8 SS 3.83212PS 8-32 X 3/4 PAN HD TRI-WING MS, 18-8 SS 3.83234PS 8-32 X 1 PAN HD TRI-WING MS, 18-8 SS 3.8321PS 10-32 X 1/2 PAN HD TRI-WING MS, 18-8 SS 3.10312PS 10-32 X 3/4 PAN HD TRI-WING MS, 18-8 SS 3.10334PS 10-32 X 1 PAN HD TRI-WING MS, 18-8 SS 3.1031PS 10-24 X 1/2 PAN HD TRI-WING MS, 18-8 SS 3.10212PS 10-24 X 3/4 PAN HD TRI-WING MS, 18-8 SS 3.10234PS 10-24 X 1 PAN HD TRI-WING MS, 18-8 SS 3.1021PS

BITS ONLY SIZE PART NO. W1 TRI-WING POWER BIT 3B.W1 W2 TRI-WING POWER BIT 3B.W2 W3 TRI-WING POWER BIT 3B.W3 W4 TRI-WING POWER BIT 3B.W4 W5 TRI-WING POWER BIT 3B.W5

DRIVERS COMPLETE-HANDLE WITH BIT SIZE PART NO. W2 TRI-WING DRIVER 3D.W2 W3 TRI-WING DRIVER 3D.W3 W4 TRI-WING DRIVER 3D.W4 W5 TRI-WING DRIVER 3D.W5