The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-149-8937, 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 | 5305-00-149-8937 |
| Primary Part Number | MBEU39823 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Martin-Baker Aircraft Company Limited |
| Status | ACTIVE |
| Width Across Flats | 0.171 INCHES NOMINAL IN |
| Head Height | 0.190 INCHES NOMINAL IN |
| Fastener Length | 0.500 INCHES NOMINAL IN |
| Thread Length | 0.437 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | KNURLED NO. 4 |
| Thread Direction | RIGHT-HAND |
| Locking Feature | PELLET THREADS |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.304 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 |
|---|---|
| MBEU39823 PRIMARY | Martin-Baker Aircraft Company Limited (GBR) |
NSN 5305-00-149-8937 is a Screw,cap,socket Head, manufactured by Martin-Baker Aircraft Company Limited, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-149-8937 has 1 manufacturer part number on file: MBEU39823 (Martin-Baker Aircraft Company Limited).
Key specifications for MBEU39823: Width Across Flats: 0.171 INCHES NOMINAL IN; Head Height: 0.190 INCHES NOMINAL IN; Fastener Length: 0.500 INCHES NOMINAL IN; Thread Length: 0.437 INCHES NOMINAL 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.