The Bolt,shoulder, cataloged under National Stock Number 5306-01-129-3325, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Martin-Baker Aircraft Company Limited. Government technical data includes 15 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 | 5306-01-129-3325 |
| Primary Part Number | MBEU-66745 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Martin-Baker Aircraft Company Limited |
| Status | ACTIVE |
| Head Height | 0.108 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN |
| Fastener Length | 0.887 INCHES MINIMUM AND 0.892 INCHES MAXIMUM IN |
| Shoulder Length | 0.435 INCHES MINIMUM AND 0.440 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.247 INCHES MINIMUM AND 0.249 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.300 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | S143D,FSCM U1604 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.339 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| 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 |
|---|---|
| MBEU-66745 PRIMARY | Martin-Baker Aircraft Company Limited (GBR) |
NSN 5306-01-129-3325 is a Bolt,shoulder, manufactured by Martin-Baker Aircraft Company Limited, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-129-3325 has 1 manufacturer part number on file: MBEU-66745 (Martin-Baker Aircraft Company Limited).
Key specifications for MBEU-66745: Head Height: 0.108 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN; Fastener Length: 0.887 INCHES MINIMUM AND 0.892 INCHES MAXIMUM IN; Shoulder Length: 0.435 INCHES MINIMUM AND 0.440 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.247 INCHES MINIMUM AND 0.249 INCHES MAXIMUM FIRST SHOULDER IN. 15 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.