The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-400-3268, 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 16 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-400-3268 |
| Primary Part Number | 211068655 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 0.375 INCHES NOMINAL IN |
| Head Height | 0.492 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Fastener Length | 8.500 INCHES NOMINAL IN |
| Thread Length | 1.500 INCHES MINIMUM IN |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Nondefinitive Spec/std Data | II TYPE |
| Locking Feature | STRIP OR PELLET OR PATCH THREADS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 13 |
| Material | NICKEL ALLOY 500 OVERALL |
| Thread Series Designator | UNRC |
| Head Diameter | 0.735 INCHES MINIMUM AND 0.750 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 |
|---|---|
| 211068655 PRIMARY | Naval Sea Systems Command (USA) |
| 585-6406777-143 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 0.500-13UNRC3AX8.500 | 3/1 Design control — primary reference U.S. Government activity |
| MIL-S-1222 TYII | 4/1 Identification reference U.S. Government activity |
| MILS1222TYII .5 00-13UNRC3AX8.5 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5305-01-400-3268 is a Screw,cap,socket Head, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-400-3268 has 2 manufacturer part numbers on file: 211068655 (Naval Sea Systems Command), 585-6406777-143 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-401-3724. Verify interchangeability with system specifications before substitution.
Key specifications for 211068655: Width Across Flats: 0.375 INCHES NOMINAL IN; Head Height: 0.492 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Fastener Length: 8.500 INCHES NOMINAL IN; Thread Length: 1.500 INCHES MINIMUM IN. 16 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.