The Bolt,shoulder, cataloged under National Stock Number 5306-00-003-3899, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Naval Group Site De Brest. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-003-3899 |
| Primary Part Number | EPA21A00-071 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Naval Group Site De Brest |
| Status | ACTIVE |
| Head Height | 0.375 INCHES NOMINAL IN |
| Fastener Length | 6.937 INCHES NOMINAL IN |
| Shoulder Length | 0.907 INCHES MINIMUM AND 0.938 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.497 INCHES MINIMUM AND 0.498 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.811 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.219 INCHES NOMINAL FIRST HOLE IN |
| Material Document and Classification | QQ-S-716,COND T FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 2.438 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 416 OVERALL |
| Thread Series Designator | UN |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 6.375 INCHES NOMINAL FIRST HOLE IN |
| Head Diameter | 3.250 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 |
|---|---|
| EPA21A00-071 | Naval Group Site De Brest (FRA) |
| Reference | Meaning |
|---|---|
| 420391-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-003-3899 is a Bolt,shoulder, manufactured by Naval Group Site De Brest, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-003-3899 has 1 manufacturer part number on file: EPA21A00-071 (Naval Group Site De Brest).
Key specifications for EPA21A00-071: Head Height: 0.375 INCHES NOMINAL IN; Fastener Length: 6.937 INCHES NOMINAL IN; Shoulder Length: 0.907 INCHES MINIMUM AND 0.938 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.497 INCHES MINIMUM AND 0.498 INCHES MAXIMUM FIRST SHOULDER IN. 17 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.