The Bolt,square Neck, cataloged under National Stock Number 5306-01-197-6593, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-197-6593 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Neck Length | 0.313 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN |
| Head Height | 0.313 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN |
| Fastener Length | 3.400 INCHES MINIMUM AND 3.580 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | 0Q-P-416 TY 2 CL 3 FED SPEC 1ST TREATMENT RESPONSE OR MIL-C-81562 TY 2 CL 3 MIL SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 TY 2 CL 3 FED SPEC 2ND TREATMENT RESPONSE OR MIL-C-81562 TY 2 CL 3 MIL SPEC 2ND TREATMENT RESPONSE OVERALL |
| Thread Length | 3.087 INCHES MINIMUM AND 3.236 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM A307 GR A ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Head Style | BUTTON |
| Thread Direction | RIGHT-HAND |
| Neck Width | 0.616 INCHES MINIMUM AND 0.642 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OR ZINC OVERALL |
| Minimum Tensile Strength | 60000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 11 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.219 INCHES MINIMUM AND 1.344 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MS35751-160 | 5/9 Secondary reference U.S. Government activity |
| MS35751-160 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-197-6593 is a Bolt,square Neck, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-197-6593: Neck Length: 0.313 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN; Head Height: 0.313 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN; Fastener Length: 3.400 INCHES MINIMUM AND 3.580 INCHES MAXIMUM IN; Surface Treatment Document and Classification: 0Q-P-416 TY 2 CL 3 FED SPEC 1ST TREATMENT RESPONSE OR MIL-C-81562 TY 2 CL 3 MIL SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 TY 2 CL 3 FED SPEC 2ND TREATMENT RESPONSE OR MIL-C-81562 TY 2 CL 3 MIL SPEC 2ND TREATMENT RESPONSE OVERALL. 17 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.