The Bolt,shoulder, cataloged under National Stock Number 5306-01-365-3153, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-365-3153 |
| Primary Part Number | MBEU145542 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 1.669 INCHES MINIMUM AND 1.671 INCHES MAXIMUM IN |
| Shoulder Length | 0.163 INCHES MINIMUM AND 0.165 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Length | 1.243 INCHES NOMINAL SECOND SHOULDER IN |
| Shoulder Diameter | 0.4355 INCHES MINIMUM AND 0.4365 INCHES MAXIMUM SECOND SHOULDER IN |
| Shoulder Diameter | 0.680 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 0.360 INCHES MINIMUM AND 0.427 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND SECOND SHOULDER |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | MIL-T-81556 COMP AB 1 COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | ROUND W/WRENCH FLATS |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.628 INCHES MINIMUM AND 0.633 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 1.620 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 | F |
| Part Number | Manufacturer |
|---|---|
| MBEU145542 | Martin-Baker Aircraft Company Limited (GBR) |
| MBEU145542 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 2530013653153 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 10116261 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5306-01-365-3153 is a Bolt,shoulder, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-365-3153 has 2 manufacturer part numbers on file: MBEU145542 (Martin-Baker Aircraft Company Limited), MBEU145542 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for MBEU145542: Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 1.669 INCHES MINIMUM AND 1.671 INCHES MAXIMUM IN; Shoulder Length: 0.163 INCHES MINIMUM AND 0.165 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Length: 1.243 INCHES NOMINAL SECOND SHOULDER IN. 19 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.