NAS517-4-3 Close Tolerance Machine Screw, 1/4-28, UNF, 0.367 to 0.513 in L Thread

TECHNICAL INFORMATION

• National Aerospace Standard
• AMS-QQ-P-416 Type II Class 3
• MIL-S-6050/AN-S-9 Qualified
• FAA-STD Approved

SPECIFICATIONS
• Diameter: 1/4 in
• Length: 0.656 in
• Thread Size: 1/4-28
• Thread Type: UNF
• Head Type: Flat Countersunk
• Thread Direction: Right Hand
• Material: Alloy Steel
• Drive Type: Phillips
• Finish: Cadmium/Chromate
• Thread Length: 0.367 to 0.513 in
• Thread Class: 3A
• Head Diameter: 0.452 to 0.51 in
• Grip Size: 0.188 in
• Grade: 8630
• Tensile Strength: 160000 psi
• Domestic/Import: Domestic