The Screw,machine, cataloged under National Stock Number 5305-01-469-5486, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-469-5486 |
| Primary Part Number | 91858A542 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Head Height | 0.140 INCHES NOMINAL IN |
| Fastener Length | 0.969 INCHES MINIMUM AND 1.031 INCHES MAXIMUM IN |
| Screw Material Document and Classification | QQ-S-763 FED SPEC 1ST MATERIAL RESPONSE OR ASTMA276 ASSN STD 2ND MATERIAL RESPONSE |
| Thread Length | 0.829 INCHES MINIMUM AND 0.891 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL CORROSION RESISTING |
| Internal Drive Style | SLOT |
| Countersink Angle | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.462 INCHES MINIMUM AND 0.507 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 |
|---|---|
| 91858A542 PRIMARY | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 202343 | D/9 Drawing number reference only Walker Power Systems, Inc. Dba Tiernay Turbines |
| 202343-1 | 5/9 Secondary reference Walker Power Systems, Inc. Dba Tiernay Turbines |
NSN 5305-01-469-5486 is a Screw,machine, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-469-5486 has 1 manufacturer part number on file: 91858A542 (Mcmaster-Carr Supply Co).
Key specifications for 91858A542: Head Height: 0.140 INCHES NOMINAL IN; Fastener Length: 0.969 INCHES MINIMUM AND 1.031 INCHES MAXIMUM IN; Screw Material Document and Classification: QQ-S-763 FED SPEC 1ST MATERIAL RESPONSE OR ASTMA276 ASSN STD 2ND MATERIAL RESPONSE; Thread Length: 0.829 INCHES MINIMUM AND 0.891 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.