The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-064-1556, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Rosemount Inc Dba Fisher Rosemount Service and Support. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-064-1556 |
| Primary Part Number | 01281-0316-0001 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rosemount Inc Dba Fisher Rosemount Service and Support |
| Status | ACTIVE |
| Head Height | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Fastener Length | 0.917 INCHES MINIMUM AND 0.947 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.340 INCHES NOMINAL IN |
| First Diameter From Head | 0.183 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.577 INCHES MINIMUM AND 0.607 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 01281-0316-0001 | Rosemount Aerospace Inc Dba Rosemount Aerospace Inc (USA) |
| 01281-0316-0001 PRIMARY | Rosemount Inc Dba Fisher Rosemount Service and Support (USA) |
| Reference | Meaning |
|---|---|
| 5306PL1497647 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5306-01-064-1556 is a Bolt,externally Relieved Body, manufactured by Rosemount Inc Dba Fisher Rosemount Service and Support, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-064-1556 has 2 manufacturer part numbers on file: 01281-0316-0001 (Rosemount Aerospace Inc Dba Rosemount Aerospace Inc), 01281-0316-0001 (Rosemount Inc Dba Fisher Rosemount Service and Support).
Key specifications for 01281-0316-0001: Head Height: 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN; Fastener Length: 0.917 INCHES MINIMUM AND 0.947 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.340 INCHES NOMINAL IN. 15 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.