B1/2-13 x 4 1/4 MS90728, Alloy Steel B1821 Coarse Cap Screw Per ASTM A354BD Zinc Yellow DFAR DQRW17DBPT They are made of black

They are made of black zinc-plated steel for corrosion resistance and have a sharp point for easy penetration

These rivet nuts are designed to be installed using a rivet nut tool

These nuts have a metric thread size of M6 and a pitch of 1

The 8-32 x 5/8 Slotted Pan Machine Screw Fully Threaded 18-8 Stainless Steel is a versatile and durable fastener designed for a wide range of applications

B1/2-13 x 4 1/4 MS90728, Alloy Steel B1821 Coarse Cap Screw Per ASTM A354BD Zinc Yellow DFAR DQRW17DBPT They are made of blackThe B1 2 13 x 4 1 4 MS90728 is an Alloy Steel B1821 Coarse Cap Screw Per ASTM A354BD Zinc Yellow DFAR. It has a diameter of 1 2 inch, a length of 4 1 4 inches, and a thread pitch of 13 threads per inch. The screw is made of alloy steel and has a zinc yellow chromate finish. It is designed to meet the requirements of ASTM A354BD and is compliant with the Defense Federal Acquisition Regulation Supplement (DFARS).