21429-3: SETSCREW.
The SETSCREW is a the manufacturer industrial component. Key specifications include head_style: HEADLESS (SETSCREW), point_style: CUP, thread_class: 3A A, fastener_length: 0.250 INCHES NOMINAL IN, hardness_rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.
Government catalog under NSN 5305-01-321-6670, 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 4032 OR STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL |
| head_style | HEADLESS (SETSCREW) |
| point_style | CUP |
| thread_class | 3A A |
| fastener_length | 0.250 INCHES NOMINAL IN |
| hardness_rating | 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL |
| thread_direction | RIGHT-HAND |
| surface_treatment | CADMIUM AND CHROMATE OVERALL |
| internal_drive_style | SLOT |
| nominal_thread_diameter | 0.138 INCHES IN |
| thread_quantity_per_inch | 32 |
| thread_series_designator | UNIFIED NATIONAL COARSE (UNC) |
| NSN | 5305-01-321-6670 |
| FASTENER LENGTH | 0.250 INCHES NOMINAL IN |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL |
| NOMINAL THREAD DIAMETER | 0.138 INCHES IN |
| HEAD STYLE | HEADLESS (SETSCREW) |
| THREAD DIRECTION | RIGHT-HAND |
| POINT STYLE | CUP |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND 4 STYLE |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| INTERNAL DRIVE STYLE | SLOT |
No substitute or cross-reference records for this part.