NAS1151-18: SCREW,MACHINE.
The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK, head_length: 0.057 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.221 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN, thread_length: 0.276 INCHES NOMINAL IN, screw_material: STEEL COMP 4140 OR STEEL COMP 4340 OR STEEL COMP 8740. This part is cataloged in the U.S.
Government catalog under NSN 5305-01-691-8169, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.
Verify compatibility with your specific system configuration before ordering.
| head_style | FLAT COUNTERSUNK |
| head_length | 0.057 INCHES NOMINAL IN |
| thread_class | 3A A |
| head_diameter | 0.221 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN |
| thread_length | 0.276 INCHES NOMINAL IN |
| screw_material | STEEL COMP 4140 OR STEEL COMP 4340 OR STEEL COMP 8740 |
| fastener_length | 1.386 INCHES MINIMUM AND 1.416 INCHES MAXIMUM IN |
| hardness_rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| thread_direction | RIGHT-HAND |
| countersink_angle | 100.0 DEGREES NOMINAL |
| internal_drive_style | OFFSET CRUCIFORM (TORQUE SET) |
| nominal_thread_diameter | 0.138 INCHES IN |
| NSN | 5305-01-691-8169 |
| SCREW SURFACE TREATMENT | CADMIUM AND CHROMATE |
| FASTENER LENGTH | 1.386 INCHES MINIMUM AND 1.416 INCHES MAXIMUM IN |
| THREAD LENGTH | 0.276 INCHES NOMINAL IN |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| NOMINAL THREAD DIAMETER | 0.138 INCHES IN |
| HEAD STYLE | FLAT COUNTERSUNK |
| THREAD DIRECTION | RIGHT-HAND |
| HEAD LENGTH | 0.057 INCHES NOMINAL IN |
| SCREW MATERIAL | STEEL COMP 4140 OR STEEL COMP 4340 OR STEEL COMP 8740 |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH LBS |
No substitute or cross-reference records for this part.