The Screw,machine, cataloged under National Stock Number 5305-00-993-4254, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Bsi Standards Limited. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-993-4254 |
| Primary Part Number | A113-2E |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Bsi Standards Limited |
| Status | ACTIVE |
| Head Height | 0.133 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN |
| Screw Surface Treatment | CADMIUM |
| Fastener Length | 0.800 INCHES MINIMUM AND 0.840 INCHES MAXIMUM IN |
| Screw Material Document and Classification | BS S94 ASSN STD SINGLE MATERIAL RESPONSE OR BS S95 ASSN STD SINGLE MATERIAL RESPONSE OR BS S114 ASSN STD SINGLE MATERIAL RESPONSE OR BS S116 ASSN STD SINGLE MATERIAL RESPONSE OR BS S117 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Length | 0.600 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | BUTTON |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 28 |
| Thread Series Designator | UNF |
| Head Diameter | 0.546 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | DTD 904 FSCM K4787 MFR REF SINGLE TREATMENT RESPONSE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5305-00-993-4254 is a Screw,machine, manufactured by Bsi Standards Limited, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-993-4254 has 3 manufacturer part numbers on file: A113-2E (Martin-Baker Aircraft Company Limited), A113-2E (Safran Martin-Baker France), A113-2E (Bsi Standards Limited).
1 possible match (shared part number, not a government interchangeability claim): 5306-01-654-2701. Verify interchangeability with system specifications before substitution.
Key specifications for A113-2E: Head Height: 0.133 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN; Screw Surface Treatment: CADMIUM; Fastener Length: 0.800 INCHES MINIMUM AND 0.840 INCHES MAXIMUM IN; Screw Material Document and Classification: BS S94 ASSN STD SINGLE MATERIAL RESPONSE OR BS S95 ASSN STD SINGLE MATERIAL RESPONSE OR BS S114 ASSN STD SINGLE MATERIAL RESPONSE OR BS S116 ASSN STD SINGLE MATERIAL RESPONSE OR BS S117 ASSN STD SINGLE MATERIAL RESPONSE. 15 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.