The Cap,filler Opening, cataloged under National Stock Number 5342-01-445-6426, is classified within Federal Supply Class 5342 (Hardware, Weapon System) of the Hardware and Abrasives group. The manufacturer of record is Wisco Products Inc. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5342-01-445-6426 |
| Primary Part Number | 4977-4 |
| Item Name | Cap,filler Opening |
| FSC / FSG | 5342 / 53 — Hardware, Weapon System |
| Manufacturer | Wisco Products Inc |
| Status | ACTIVE |
| Material Document and Classification | MIL-S-6721 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Material | STEEL CORROSION RESISTING OVERALL |
| 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 |
|---|---|
| 4977-4 PRIMARY | Wisco Products Inc (USA) |
| Reference | Meaning |
|---|---|
| 4977-4 | 5/9 Secondary reference Wisco Products Inc Wisco Sarasota Div |
NSN 5342-01-445-6426 is a Cap,filler Opening, manufactured by Wisco Products Inc, classified under FSC 5342, Hardware, Weapon System. Status: active.
NSN 5342-01-445-6426 has 1 manufacturer part number on file: 4977-4 (Wisco Products Inc).
1 possible match (shared part number, not a government interchangeability claim): 5945-01-450-4730. Verify interchangeability with system specifications before substitution.
Key specifications for 4977-4: Overall Height: 0.580 INCHES NOMINAL IN; Material Document and Classification: MIL-S-6721 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Overall Length: 3.220 INCHES NOMINAL IN; Overall Width: 2.560 INCHES NOMINAL IN. 2 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.