Torx Pin-Head - Maximum torque transfer & positive tool engagement means easier drive installation with less pressure and slippage. Torx Pin-Head offers a high degree of Security and requires a matching drive bit for removal.
Tamperproof Screw Company
4-40 X 1/2 Flat Head Torx Security Machine Screw, 18-8 Stainless Steel (100/Pkg.)
$21.67
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