The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, head_style: HEXAGON, head_height: 0.219 INCHES NOMINAL IN, thread_class: 3A A, thread_length: 0.500 INCHES MINIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-274-5558, 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 COMP 4140 OVERALL |
| head_style | HEXAGON |
| head_height | 0.219 INCHES NOMINAL IN |
| thread_class | 3A A |
| thread_length | 0.500 INCHES MINIMUM IN |
| shoulder_shape | ROUND FIRST SHOULDER |
| fastener_length | 1.375 INCHES NOMINAL IN |
| hardness_rating | 26.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL |
| shoulder_length | 0.875 INCHES NOMINAL FIRST SHOULDER IN |
| special_features | ROUNDED UNDERCUT BETWEEN HEAD AND SHOULDER 0.010 IN. 3/64 IN. LG IN |
| thread_direction | RIGHT-HAND |
| shoulder_diameter | 0.264 INCHES MINIMUM AND 0.265 INCHES MAXIMUM FIRST SHOULDER IN |
| NSN | 5306-00-274-5558 |
| HEAD STYLE | HEXAGON |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER DIAMETER | 0.264 INCHES MINIMUM AND 0.265 INCHES MAXIMUM FIRST SHOULDER IN |
| WIDTH BETWEEN FLATS | 0.438 INCHES NOMINAL IN |
| THREAD CLASS | 3A A |
| NOMINAL THREAD DIAMETER | 0.250 INCHES IN |
| THREAD SERIES DESIGNATOR | UNF |
| SHOULDER LENGTH | 0.875 INCHES NOMINAL FIRST SHOULDER IN |
| SPECIAL FEATURES | ROUNDED UNDERCUT BETWEEN HEAD AND SHOULDER 0.010 IN. 3/64 IN. LG IN |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL |