The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-445-7253, 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 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-445-7253 |
| Primary Part Number | 656047 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Head Height | 0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| Fastener Length | 0.655 INCHES NOMINAL IN |
| Thread Length | 0.275 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN |
| Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | COUNTERBORE UNTHREADED |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Counterbore Depth | 0.110 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Counterbore Diameter | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Width Between Flats | 1.106 INCHES MINIMUM AND 1.127 INCHES MAXIMUM IN |
| Concentric Hole Diameter | 0.440 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 656047 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 656047 PRIMARY | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 656047 | 5/9 Secondary reference Tokyo Judogi Kogyo Co. |
| 656047 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 5306-00-445-7253 is a Bolt,internally Relieved Body, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-445-7253 has 2 manufacturer part numbers on file: 656047 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 656047 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 656047: Head Height: 0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN; Fastener Length: 0.655 INCHES NOMINAL IN; Thread Length: 0.275 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN; Hardness Rating: 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL. 16 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.