The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-138-3678, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 18 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-138-3678 |
| Primary Part Number | 32-58439-7 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.250 INCHES NOMINAL IN |
| Thread Series | UNF CONCENTRIC HOLE |
| Concentric Hole Depth | 1.000 INCHES NOMINAL IN |
| Thread Length | 1.000 INCHES MAXIMUM IN |
| Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM OVERALL |
| Threads Per Inch | 24 CONCENTRIC HOLE |
| Style Designator | COUNTERBORE THREADED |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES CONCENTRIC HOLE IN |
| Counterbore Diameter | 0.268 INCHES NOMINAL IN |
| Width Between Flats | 0.875 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 630 OVERALL |
| Shoulder Length | 2.050 INCHES NOMINAL IN |
| 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 |
|---|---|
| 32-58439-7 PRIMARY | The Boeing Company Div Defense (USA) |
NSN 5306-00-138-3678 is a Bolt,internally Relieved Body, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-138-3678 has 1 manufacturer part number on file: 32-58439-7 (The Boeing Company Div Defense).
Key specifications for 32-58439-7: Head Height: 0.250 INCHES NOMINAL IN; Thread Series: UNF CONCENTRIC HOLE; Concentric Hole Depth: 1.000 INCHES NOMINAL IN; Thread Length: 1.000 INCHES MAXIMUM IN. 18 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.