The Bolt,shoulder, cataloged under National Stock Number 5306-01-571-0561, 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17 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-571-0561 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.150 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Fastener Length | 0.750 INCHES NOMINAL IN |
| Shoulder Length | 0.150 INCHES MINIMUM AND 0.188 INCHES MAXIMUM HEAD IN |
| Surface Treatment Document and Classification | ASTM B633, SC2. TY III ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 1.000 INCHES NOMINAL IN |
| Shoulder Shape | HEXAGONAL OVERALL |
| Material Document and Classification | GRADE 5 IAW SAE J995 ASSN STD SINGLE MATERIAL RESPONSE OR ANSI/ASME B.18.2.1 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.425 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Shoulder Width Across Flats | 0.484 INCHES MINIMUM AND 0.505 INCHES MAXIMUM HEAD IN |
| Surface Treatment | ZINC OVERALL |
| Thread Class | 3 |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 500K1928-32 | 5/9 Secondary reference Drs Environmental Systems Inc |
| 500K1928 | 3/9 Design control — primary reference U.S. Government activity |
| 500K1928-32 | 3/2 Design control — primary reference U.S. Government activity |
| 500K1928 | 3/1 Design control — primary reference Drs Environmental Systems Inc |
| 500K1928-32 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-571-0561 is a Bolt,shoulder, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-571-0561: Head Height: 0.150 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN; Fastener Length: 0.750 INCHES NOMINAL IN; Shoulder Length: 0.150 INCHES MINIMUM AND 0.188 INCHES MAXIMUM HEAD IN; Surface Treatment Document and Classification: ASTM B633, SC2. TY III ASSN STD SINGLE 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.