The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-148-2649, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Martin-Baker Aircraft Company Limited. Government technical data includes 14 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 | 5305-01-148-2649 |
| Primary Part Number | MBEU/68378 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Martin-Baker Aircraft Company Limited |
| Status | ACTIVE |
| Head Height | 0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN |
| Fastener Length | 3.290 INCHES MINIMUM AND 3.310 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MBA PS 302 CL 2 TY 1 FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 1.843 INCHES MINIMUM AND 1.883 INCHES MAXIMUM IN |
| Material Document and Classification | A102-26N FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.741 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | NICKEL 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/68378 PRIMARY | Martin-Baker Aircraft Company Limited (GBR) |
NSN 5305-01-148-2649 is a Screw,cap,hexagon Head, manufactured by Martin-Baker Aircraft Company Limited, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-148-2649 has 1 manufacturer part number on file: MBEU/68378 (Martin-Baker Aircraft Company Limited).
Key specifications for MBEU/68378: Head Height: 0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN; Fastener Length: 3.290 INCHES MINIMUM AND 3.310 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MBA PS 302 CL 2 TY 1 FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 1.843 INCHES MINIMUM AND 1.883 INCHES MAXIMUM IN. 14 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.