Bulk 5/16″-18 Unslotted Indent Hex-Washer Head Thread-Cutting Screws — Type F, Bright-Zinc & Hydrogen-Relief Baked Length:1500 Qty - 5/16-18 x 1" Their lobular C-series groove cold-forms

Their lobular C-series groove cold-forms true 6g ISO-metric threads in aluminum

Phillips Drive: #4 Phillips recess (for 3/8″ screws) delivers secure

Check out our bulk PT / EJOT thread-forming screws designed specifically for thermoplastics—perfect when you need high pull-out strength without pre-tapping

040″ while preserving full thread length

They provide a reliable method for verifying bolt tension

Bulk 5/16″-18 Unslotted Indent Hex-Washer Head Thread-Cutting Screws — Type F, Bright-Zinc & Hydrogen-Relief Baked Length:1500 Qty - 5/16-18 x 1" Their lobular C-series groove cold-formsMonster Overview: Made for trailer decks, steel framing, dock builds and heavy timber to steel joints, these 5 16 18 Unslotted Indent Hex Washer Head Thread Cutting Screws combine speed with strength. Heat treated carbon steel blanks carry a lustrous bright zinc electro plate, are hydrogen relief baked, then factory dry waxed for reliably low drive torque. The captive washer flange spreads load, while the Type F fluted point taps mating threads in a