Screw, Close Tolerance, Alloy Steel

Screw is a close tolerance fastener identified by NAS1580A4T4X. This screw features a flat countersunk head style, designed to sit flush with the surface. The grip diameter ranges from 0.2490 inches to 0.2495 inches, ensuring a secure fit. The thread class is 3A, and it has a nominal thread diameter of 0.2500 inches, with a right-hand thread direction. The screw's overall length varies between 0.638 inches and 0.668 inches, making it versatile for different fastening needs. With a countersink angle of 99.0 degrees to 101.0 degrees, it allows for clean installations.