The Screw,machine, cataloged under National Stock Number 5305-01-129-3327, 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 | 5305-01-129-3327 |
| Primary Part Number | MBEU-66557 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Martin-Baker Aircraft Company Limited |
| Status | ACTIVE |
| Screw Surface Treatment | PASSIVATE |
| Fastener Length | 0.312 INCHES NOMINAL IN |
| Thread Length | 0.200 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL CORROSION RESISTING |
| Askewed Head Angle | 90.0 DEGREES NOMINAL |
| Minimum Tensile Strength | 1120 POUNDS PER SQUARE INCH LBS |
| Countersink Angle | 82.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.359 INCHES MAXIMUM 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 |
|---|---|
| MBEU-66557 PRIMARY | Martin-Baker Aircraft Company Limited (GBR) |
NSN 5305-01-129-3327 is a Screw,machine, manufactured by Martin-Baker Aircraft Company Limited, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-129-3327 has 1 manufacturer part number on file: MBEU-66557 (Martin-Baker Aircraft Company Limited).
Key specifications for MBEU-66557: Screw Surface Treatment: PASSIVATE; Fastener Length: 0.312 INCHES NOMINAL IN; Thread Length: 0.200 INCHES NOMINAL IN; Nominal Thread Diameter: 0.164 INCHES 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.