The Bolt,shoulder, cataloged under National Stock Number 5306-01-232-7899, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-232-7899 |
| Primary Part Number | HS4176-2-1A |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Head Height | 0.219 INCHES NOMINAL IN |
| Fastener Length | 0.563 INCHES NOMINAL IN |
| Shoulder Length | 0.250 INCHES NOMINAL ALL SHOULDERS IN |
| Shoulder Diameter | 0.313 INCHES NOMINAL ALL SHOULDERS IN |
| Thread Length | 0.238 INCHES NOMINAL IN |
| Shoulder Shape | ROUND ALL SHOULDERS |
| Head Style | FILLISTER |
| Thread Direction | RIGHT-HAND |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.438 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 |
|---|---|
| HS4176-2-1A PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| HS4176-2-1A | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
NSN 5306-01-232-7899 is a Bolt,shoulder, manufactured by The Boeing Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-232-7899 has 1 manufacturer part number on file: HS4176-2-1A (The Boeing Company).
Key specifications for HS4176-2-1A: Head Height: 0.219 INCHES NOMINAL IN; Fastener Length: 0.563 INCHES NOMINAL IN; Shoulder Length: 0.250 INCHES NOMINAL ALL SHOULDERS IN; Shoulder Diameter: 0.313 INCHES NOMINAL ALL SHOULDERS IN. 11 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.