The Bolt,internal Wrenching, cataloged under National Stock Number 5306-01-124-5243, 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 27 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-124-5243 |
| Primary Part Number | 803-4384539 PIECE 85 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Width Across Flats | 1.000 INCHES NOMINAL IN |
| Head Height | 1.500 INCHES NOMINAL IN |
| Fastener Length | 11.188 INCHES NOMINAL IN |
| Thread Length | 2.000 INCHES NOMINAL IN |
| Hardness Rating | 279.0 BRINELL STANDARD MINIMUM AND 300.0 BRINELL STANDARD MAXIMUM OVERALL |
| Material Document and Classification | MIL-S5626 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 1.500 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 8.313 INCHES NOMINAL IN |
| Nominal Thread Diameter | 1.500 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 8.563 INCHES NOMINAL IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 1.345 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 2.938 INCHES NOMINAL IN |
| Locking Feature | PELLET THREADS |
| Externally Relieved Body Diameter Quantity | 3 |
| Minimum Tensile Strength | 135000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 115000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 8 |
| Material | STEEL COMP 4140 OVERALL |
| Third Diameter From Head | 1.500 INCHES NOMINAL IN |
| Thread Series Designator | UN |
| Head Diameter | 2.250 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 |
|---|---|
| 803-4384539 PIECE 85 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 810-4384539 PIECE 85 | 5/9 Secondary reference Naval Sea Systems Command |
| 810-4384539 PIECE 85 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5306-01-124-5243 is a Bolt,internal Wrenching, manufactured by Naval Sea Systems Command, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-124-5243 has 1 manufacturer part number on file: 803-4384539 PIECE 85 (Naval Sea Systems Command).
Key specifications for 803-4384539 PIECE 85: Surface Finish: 63.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Width Across Flats: 1.000 INCHES NOMINAL IN; Head Height: 1.500 INCHES NOMINAL IN. 27 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.