The Bolt,machine, cataloged under National Stock Number 5306-00-604-5477, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Bolt,machine |
| FSC / FSG | 5306 — Bolts (FSG 53) |
| Manufacturers | Epi Printers, Inc. Div Business Development (CAGE 18222); All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners (CAGE 57472); Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (CAGE 77445); Bristol Industries, Llc (CAGE 27238) |
| Parameter | Value |
|---|---|
| NSN | 5306-00-604-5477 |
| Primary Part Number | 285971 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Head Height | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| Fastener Length | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Criticality Code Justification | FEAT |
| Hole Configuration Style | HEXAGON FLATS |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 8740 OVERALL |
| Hole Quantity | 1 |
| Thread Series Designator | UNF |
| Hole Type | DRILLED |
| Hole Diameter | 0.065 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 285971 | Epi Printers, Inc. Div Business Development (USA) |
| 285971 | All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners (USA) |
| 285971 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 285971 | Bristol Industries, Llc (USA) |
| Reference | Meaning |
|---|---|
| 285971 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-00-604-5477 is a Bolt,machine, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-604-5477 has 4 manufacturer part numbers on file: 285971 (Epi Printers, Inc. Div Business Development), 285971 (All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners), 285971 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 285971 (Bristol Industries, Llc).
Key specifications for 285971: Head Height: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN; Fastener Length: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN. 21 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.