The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-475-0072, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-475-0072 |
| Primary Part Number | 124-6293627 PC 34 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.609 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Fifth Diameter | 4.125 INCHES NOMINAL IN |
| Head Height | 0.562 INCHES NOMINAL IN |
| Fastener Length | 4.125 INCHES NOMINAL IN |
| Thread Length | 0.687 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-764,CL303,CONDA FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.871 INCHES MINIMUM AND 0.872 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.188 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 3.250 INCHES NOMINAL IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.609 INCHES NOMINAL IN |
| Width Between Flats | 1.312 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 1.625 INCHES NOMINAL IN |
| Fifth Diameter From Head | 0.750 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 5 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 10 |
| Material | STEEL COMP 303 OVERALL |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 3.438 INCHES NOMINAL IN |
| Third Diameter From Head | 0.871 INCHES MINIMUM AND 0.872 INCHES MAXIMUM IN |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 124-6293627 PC 34 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 124-6293627 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 5306-01-475-0072 is a Bolt,externally Relieved Body, manufactured by Naval Sea Systems Command, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-475-0072 has 1 manufacturer part number on file: 124-6293627 PC 34 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 5315-01-475-0114, 5315-01-475-0124. Verify interchangeability with system specifications before substitution.
Key specifications for 124-6293627 PC 34: Fourth Diameter From Head: 0.609 INCHES NOMINAL IN; Distance From Largest Bearing Surface of Head to End of Fifth Diameter: 4.125 INCHES NOMINAL IN; Head Height: 0.562 INCHES NOMINAL IN; Fastener Length: 4.125 INCHES NOMINAL IN. 23 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.