B1/4-20 x 7/8 MS90728, Alloy Steel B1821 Coarse Cap Screw Per ASTM A354BD Zinc Yellow DFAR KWTF188 while the Type A flat

while the Type A flat head sits flush with the surface for a clean

They are also suitable for use in metal and plastic applications

718-inch round base provides a wide surface area for welding

The #6 External Internal Combination Tooth Lock Washer is a versatile and reliable fastener designed to prevent loosening due to vibration or shock

B1/4-20 x 7/8 MS90728, Alloy Steel B1821 Coarse Cap Screw Per ASTM A354BD Zinc Yellow DFAR KWTF188 while the Type A flatB1 4 20 x 7 8 MS90728 is a Coarse Cap Screw made of Alloy Steel B1821, meeting the specifications of ASTM A354BD. It has a diameter of 1 4 inch, a length of 7 8 inch, and a thread size of 20 threads per inch. The screw is zinc plated in yellow, providing corrosion resistance and a decorative finish. It is DFAR compliant, ensuring compliance with the Defense Federal Acquisition Regulation Supplement.