Product details:

410 Stainless Steel #8-18 x 1 inch Unslotted Indented Hex Washer Head Tek screws w/Bonded Washer, Passivated & WaxedThese 3/4 inch length 1/4 inch drive Hex Washer Head 410 STAINLESS STEEL Self-Drilling screws are #8-18 (18 threads per inch) #2 Point. Pre-assembled 1/2 inch outside diameter Bonded NEO-EPDM 18-8 Stainless metal backed washer creates leak proof seal. 410 Stainless steel is a low-carbon grade of hardenable stainless steel. This product is passivated and waxed. The process of passivation creates a surface film causing the metal to lose its chemical reactivity with environmental factors such as air or water resulting in high corrosion resistance. Meets F.I.P.-1000.7 for torsional strength and drill speed. Meets SAE J78 for performance & dimensional specifications. Each box contains approximately 4,000 screws (30 pounds)Applications Include:Attaching exterior metal to metal, drill capacity .035-.100, drill speed 2500 RPM.