The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-00-217-3146, 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 22 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-217-3146 |
| Primary Part Number | 237208 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Head Height | 0.260 INCHES NOMINAL IN |
| Fastener Length | 1.403 INCHES NOMINAL IN |
| Thread Length | 0.698 INCHES MINIMUM IN |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| First Diameter From Head | 0.312 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.370 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 0.562 INCHES NOMINAL IN |
| Head Style | ROUND W/WRENCH FLATS |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.245 INCHES NOMINAL IN |
| Width Between Flats | 0.510 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.280 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 3 |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 1360000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 1A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Third Diameter From Head | 0.312 INCHES NOMINAL IN |
| Thread Series Designator | UNF |
| Head Diameter | 0.635 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 | X |
| Part Number | Manufacturer |
|---|---|
| 237208 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
NSN 5306-00-217-3146 is a Bolt,externally Relieved Body, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-217-3146 has 1 manufacturer part number on file: 237208 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
1 possible match (shared part number, not a government interchangeability claim): 4820-00-404-1517. Verify interchangeability with system specifications before substitution.
Key specifications for 237208: Head Height: 0.260 INCHES NOMINAL IN; Fastener Length: 1.403 INCHES NOMINAL IN; Thread Length: 0.698 INCHES MINIMUM IN; Hardness Rating: 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL. 22 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.