The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-678-1289, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Jcb Inc.. Government technical data includes 11 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-678-1289 |
| Primary Part Number | 1321/0505D |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Jcb Inc. |
| Status | ACTIVE |
| Fastener Length | 20.0 MILLIMETERS NOMINAL MM |
| Surface Treatment Document and Classification | CODE D,TYPE 1 ZINC FLAKE SILVER MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Precious Material | SILVER |
| Thread Length | 20.0 MILLIMETERS NOMINAL MM |
| Nominal Thread Diameter | 12.0 MILLIMETERS MM |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Locking Feature | PATCH LOCKING FEATURE |
| Surface Treatment | ZINC AND SILVER OVERALL |
| Material | STEEL PROPERTY CLASS 8.8 OVERALL |
| Thread Series Designator | M |
| 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 |
|---|---|
| 1321/0505D PRIMARY | Jcb Inc. (USA) |
NSN 5305-01-678-1289 is a Screw,cap,hexagon Head, manufactured by Jcb Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-678-1289 has 1 manufacturer part number on file: 1321/0505D (Jcb Inc.).
Key specifications for 1321/0505D: Fastener Length: 20.0 MILLIMETERS NOMINAL MM; Surface Treatment Document and Classification: CODE D,TYPE 1 ZINC FLAKE SILVER MFR REF SINGLE TREATMENT RESPONSE OVERALL; Precious Material: SILVER; Thread Length: 20.0 MILLIMETERS NOMINAL MM. 11 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.