The Screw,machine, cataloged under National Stock Number 5305-01-049-9121, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Mbda Uk Ltd. 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-049-9121 |
| Primary Part Number | A05221 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Mbda Uk Ltd |
| Status | ACTIVE |
| Head Height | 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN |
| Screw Surface Treatment | PASSIVATE |
| Fastener Length | 0.157 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Special Test Features | SPECIAL QUALITY CONTROL TESTING |
| Thread Length | 0.107 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Criticality Code Justification | ZZZW |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | PAN |
| Thread Direction | RIGHT-HAND |
| Departure From Cited Document | AS MOD BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS |
| Nondefinitive Spec/std Data | 3 TYPE AND 9C STYLE |
| Screw Material | STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 308 OR STEEL COMP 309 OR STEEL COMP 310 OR STEEL COMP 310S OR STEEL COMP 314 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 323 OR STEEL COMP 324 OR STEEL COMP 347 OR STEEL COMP 348 OR STEEL COMP 385 |
| Minimum Tensile Strength | 80000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Test Data Document | 81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Thread Quantity Per Inch | 40 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.205 INCHES MINIMUM AND 0.219 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 | Y |
| Part Number | Manufacturer |
|---|---|
| A05221 | Mbda Uk Ltd (GBR) |
| P29044 | Martin-Baker Aircraft Company Limited (GBR) |
| Reference | Meaning |
|---|---|
| 10114913 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| MS51957-12 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| F13-4-3LG | 5/9 Secondary reference Bae Systems Information and Electronic Systems Integration Inc. |
| FF-S-92 | 4/1 Identification reference U.S. Government activity |
| 418293-12 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 400-2033-132 | C/1 Advisory reference — outside the item-of-supply concept Eastman Kodak Co Commercial & Government Systems |
| 03400001 FIND 19 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-049-9121 is a Screw,machine, manufactured by Mbda Uk Ltd, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-049-9121 has 2 manufacturer part numbers on file: A05221 (Mbda Uk Ltd), P29044 (Martin-Baker Aircraft Company Limited).
Key specifications for A05221: Head Height: 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN; Screw Surface Treatment: PASSIVATE; Fastener Length: 0.157 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN; Special Test Features: SPECIAL QUALITY CONTROL TESTING. 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.