The Screw,machine, cataloged under National Stock Number 5305-01-426-8409, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-426-8409 |
| Primary Part Number | 211067080 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Fastener Length | 0.875 INCHES NOMINAL IN |
| Thread Length | 0.875 INCHES NOMINAL IN |
| Locking Feature Material | PLASTIC POLYAMIDE NYLON |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Locking Feature | PATCH OR PELLET OR STRIP |
| Screw Material | NICKEL ALLOY 400 |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 82.0 DEGREES NOMINAL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.452 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 |
|---|---|
| 211067080 PRIMARY | Naval Sea Systems Command (USA) |
| DF331081-20 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| FF-S-92T111S2C | 4/1 Identification reference U.S. Government activity |
NSN 5305-01-426-8409 is a Screw,machine, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-426-8409 has 2 manufacturer part numbers on file: 211067080 (Naval Sea Systems Command), DF331081-20 (Naval Sea Systems Command).
Key specifications for 211067080: Fastener Length: 0.875 INCHES NOMINAL IN; Thread Length: 0.875 INCHES NOMINAL IN; Locking Feature Material: PLASTIC POLYAMIDE NYLON; Nominal Thread Diameter: 0.250 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.