Check the listing for details. ULTIMATE 6-48 SCREW KIT for mounting Red Dot optics / 6-48 screws. Color: Black, Condition: New. Listed at 12.00 USD. THE ULTIMATE 6-48 SCREW KIT for mounting your Red Dot optic onto firearms that require the 6-48 thread. I had all these screws custom made to order. You Will Not find these screws ANYWHERE but here. This is the Perfect kit for those of us that need 6-48 screws, but don't know what length we need. Screw Specifications: Grade 12.9 Alloy Steel (Most other screws are Grade10.9 or even 8.8) Quenched and Tempered (For Strength) Minimum Tensile Strength of 1220MPa (177,000 PSI) Black Oxide Coated Head Diameter slightly smaller for a more perfect fit. T10 Torx Drive Head You will receive: (2) 6-48 x 5/16" (2) 6-48 x 3/8" (2) 6-48 x 7/16" (2) 6-48 x 1/2" Kit ships FAST with TRACKING. Please Check my Feedback, and Purchase with Confidence. Thank You !