B1/2-20 x 4 1/2 MS90727, Alloy Steel B1821 Fine Cap Screw Per ASTM A354BD Zinc Yellow DFAR MSRB These 8 x 3 1/2

These 8 x 3 1/2 Phillips Bugle Head Coarse Thread Drywall Screws are made of black phosphate particle board and are designed for use in drywall applications

The 5/8-11 thread size means that the nut can be used with bolts and screws that have a 5/8-11 thread pitch

The full thread design provides maximum holding strength throughout the screw's length

this screw features a round washer head that provides a large bearing surface for even load distribution

B1/2-20 x 4 1/2 MS90727, Alloy Steel B1821 Fine Cap Screw Per ASTM A354BD Zinc Yellow DFAR MSRB These 8 x 3 1/2B1 2 20 x 4 1 2 MS90727 is an Alloy Steel B1821 Fine Cap Screw manufactured according to ASTM A354BD standards. It has a nominal diameter of 1 2 inch, a thread pitch of 20 threads per inch, and a length of 4 1 2 inches. The screw is zinc plated yellow and meets DFAR requirements. It is typically used in high strength applications where vibration resistance is critical.