The Screw,machine, cataloged under National Stock Number 5305-00-855-1218, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Aimtron Systems, Llc. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-00-855-1218 |
| Primary Part Number | 10271-56 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Aimtron Systems, Llc |
| Status | ACTIVE |
| Head Height | 0.187 INCHES NOMINAL IN |
| Screw Surface Treatment | PASSIVATE |
| Fastener Length | 0.656 INCHES NOMINAL IN |
| Thread Length | 0.281 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL CORROSION RESISTING |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.375 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 |
|---|---|
| 10271-56 PRIMARY | Aimtron Systems, Llc (USA) |
| Reference | Meaning |
|---|---|
| 10271-56 | 5/9 Secondary reference Cardion Inc |
| 51-18-108-24 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-00-855-1218 is a Screw,machine, manufactured by Aimtron Systems, Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-855-1218 has 1 manufacturer part number on file: 10271-56 (Aimtron Systems, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-323-5554. Verify interchangeability with system specifications before substitution.
Key specifications for 10271-56: Head Height: 0.187 INCHES NOMINAL IN; Screw Surface Treatment: PASSIVATE; Fastener Length: 0.656 INCHES NOMINAL IN; Thread Length: 0.281 INCHES MINIMUM IN. 13 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.