1339AS1037-2: BOLT,SQUARE NECK.
The BOLT,SQUARE NECK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT TOP ELEVATOR, neck_length: 0.250 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 1.310 INCHES NOMINAL IN, fastener_length: 2.250 INCHES NOMINAL IN. This part is cataloged in the U.S.
Government catalog under NSN 5306-01-421-7578, 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.
| material | STEEL OVERALL |
| head_style | FLAT TOP ELEVATOR |
| neck_length | 0.250 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN |
| thread_class | 2A A |
| head_diameter | 1.310 INCHES NOMINAL IN |
| fastener_length | 2.250 INCHES NOMINAL IN |
| special_features | SQUARE INTERNAL DRIVE 0.368 IN MIN 0.405 IN MAX IN |
| thread_direction | RIGHT-HAND |
| surface_treatment | ZINC OVERALL |
| nominal_thread_diameter | 0.380 INCHES IN |
| thread_quantity_per_inch | 16 |
| thread_series_designator | UNIFIED NATIONAL COARSE (UNC) |
| NSN | 5306-01-421-7578 |
| NECK LENGTH | 0.250 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN |
| FASTENER LENGTH | 2.250 INCHES NOMINAL IN |
| NOMINAL THREAD DIAMETER | 0.380 INCHES IN |
| HEAD STYLE | FLAT TOP ELEVATOR |
| THREAD DIRECTION | RIGHT-HAND |
| SPECIAL FEATURES | SQUARE INTERNAL DRIVE 0.368 IN MIN 0.405 IN MAX IN |
| SURFACE TREATMENT | ZINC OVERALL |
| THREAD CLASS | 2A A |
| THREAD QUANTITY PER INCH | 16 |
| MATERIAL | STEEL OVERALL |
No substitute or cross-reference records for this part.