The Bolt,machine, cataloged under National Stock Number 5306-01-475-3431, 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 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-475-3431 |
| Primary Part Number | 124-4554421 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Fastener Length | 4.375 INCHES MAXIMUM IN |
| Thread Length | 1.250 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FILLISTER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 3.125 INCHES MAXIMUM IN |
| Grip Diameter | 1.250 INCHES MAXIMUM IN |
| Thread Quantity Per Inch | 28 |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 124-4554421 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 124-4322643 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 5306-01-475-3431 is a Bolt,machine, manufactured by Naval Sea Systems Command, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-475-3431 has 1 manufacturer part number on file: 124-4554421 (Naval Sea Systems Command).
Key specifications for 124-4554421: Fastener Length: 4.375 INCHES MAXIMUM IN; Thread Length: 1.250 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.312 INCHES IN; Head Style: FILLISTER. 10 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.