The Bolt,shoulder, cataloged under National Stock Number 5306-00-182-6781, 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 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-182-6781 |
| Primary Part Number | MBEU2126RU |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Martin-Baker Aircraft Company Limited |
| Status | ACTIVE |
| Head Height | 0.230 INCHES NOMINAL IN |
| Fastener Length | 0.920 INCHES NOMINAL IN |
| Shoulder Length | 0.100 INCHES NOMINAL FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2,CL 3 ASSN STD 1ST TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.437 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 0.520 INCHES MINIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hole Configuration Style | HEXAGON FLATS |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.554 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Hole Quantity | 3 |
| Thread Series Designator | UN |
| Hole Type | DRILLED |
| Hole Diameter | 0.055 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 |
|---|---|
| MBEU2126RU PRIMARY | Martin-Baker Aircraft Company Limited (GBR) |
| Reference | Meaning |
|---|---|
| MBEU2126PU | C/1 Advisory reference — outside the item-of-supply concept Martin-Baker Aircraft Company Limited |
NSN 5306-00-182-6781 is a Bolt,shoulder, manufactured by Martin-Baker Aircraft Company Limited, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-182-6781 has 1 manufacturer part number on file: MBEU2126RU (Martin-Baker Aircraft Company Limited).
Key specifications for MBEU2126RU: Head Height: 0.230 INCHES NOMINAL IN; Fastener Length: 0.920 INCHES NOMINAL IN; Shoulder Length: 0.100 INCHES NOMINAL FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-416 TY 2,CL 3 ASSN STD 1ST TREATMENT RESPONSE OVERALL. 20 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.