Heavy Duty MS16638-8 Hexagon Shoulder Screw MS51957-8 10386527 | NSN 5305-00-914-3818

10386527 Shoulder Screw (NSN 5305-00-914-3818)

Steel shoulder screw, referenced standards MS16638-8 and MS51957-8, cadmium and chromate plated.

Part Information

• Design Control Activity: NIMIKKEISTOKESTO NCB Finland
• Part Number: 10386527
• NSN: 5305-00-914-3818

Specifications

• Thread Series: Unified National Coarse (UNC)
• Nominal Thread Diameter: 0.250 in
• Threads Per Inch: 20
• Thread Class: 3A
• Thread Direction: Right-hand
• Thread Length: 0.418–0.438 in
• Fastener Length: 0.923–0.933 in
• Head Diameter: 0.419–0.437 in
• Head Height: 0.209–0.219 in
• Shoulder Diameter (First Shoulder): 0.3085–0.3105 in
• Shoulder Length (First Shoulder): 0.495–0.505 in
• Shoulder Shape: Round
• Width Across Flats: 0.156 in nominal
• Minimum Tensile Strength: 160,000 PSI
• Hardness: Rockwell C 32.0–43.0
• Material: Steel Comp 4037, 4137, 4140, 8630, or 8740
• Surface Treatment: Cadmium and chromate, per FED SPEC QQ-416, Type 2, Class 3