Bulk 1/2″-13 Unslotted Indent Hex-Washer Head Thread-Cutting Screws — Type F, Bright-Zinc & Hydrogen-Relief Baked Length:200 Qty - 1/2-13 x 1-1/2" Identified by the "L9" marking

Identified by the "L9" marking and nine radial lines on the head

Available in metric coarse thread sizes from M4 to M12

profile maximises pull-out strength in ABS

Lock washers & flat washers for vibration control and load distribution

Bulk 1/2″-13 Unslotted Indent Hex-Washer Head Thread-Cutting Screws — Type F, Bright-Zinc & Hydrogen-Relief Baked Length:200 Qty - 1/2-13 x 1-1/2" Identified by the "L9" markingMonster Overview: Handle truck beds, structural steel decking, dock framing and heavy hardwood to steel joints with 1 2 13 Unslotted Indent Hex Washer Head Thread Cutting Screws. Forged from heat treated carbon steel, each fastener receives a lustrous bright zinc electro plate, is hydrogen relief baked to IFI specs, then factory dry waxed for reliably low drive torque. The integral washer flange spreads load, while the Type F fluted point taps mating