Spectrum Screws for Trijicon RMR / SRO and Holosun 407c / 507c – 4-40 5/16″ and 1/4″

Spectrum Screws included: Cover Plate Set – 4-40 5/16″ Torx T8 Screws Optic Mount Set – 4-40 1/4″ Torx T8 Screws These screw heads are polished and finished in Spectrum! Compatible with Zaffiri Precision Glock Models: Glock 17 Glock 17 Long Glock 19 Glock 26 Glock 34 Glock 45 (Glock 19 Gen 5) Sig P320c (Compact) Sig P320F (Full) Optic Mount Screws are compatible with Trijicon RMR / SRO and Holosun C series optics. These screws are not compatible with OEM slides or guaranteed to work with non ZP slides. Manufacturer’s Information:  Thread Size 4-40 Length 5/16” and 1/4″ Threading Fully Threaded Head Diameter 0.212″ Head Height 0.067″ Countersink Angle 82° Drive Style Torx Plus Drive Size IP8, T8 Material 18-8 Stainless Steel Finish Spectrum Hardness Rockwell B70 Tensile Strength 60,000 psi Screw Size Decimal Equivalent 0.112″ Thread Type UNC Thread Spacing Coarse Thread Fit Class 2A Thread Direction Right Hand Head Type Flat Flat Head Profile Standard System of Measurement Inch Specifications Met ASME B18.3 RoHS RoHS 3 (2015/863/EU) Compliant REACH REACH (EC 1907/2006) (01/17/2023, 233 SVHC) Compliant DFARS Specialty Metals Compliant (252.225-7009) Country of Origin United States