The Gasket, cataloged under National Stock Number 5330-00-641-6516, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Sealcraft Corporation. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-00-641-6516 |
| Primary Part Number | 21477 |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Sealcraft Corporation |
| Status | ACTIVE |
| FSC Application Data | ENGINE,GASOLINE |
| Cross-Sectional Thickness | 0.094 INCHES NOMINAL IN |
| Hardness Rating | 70.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM OVERALL |
| Style Designator | CIRCULAR |
| Cross-Sectional Shape Style | SOLID SINGLE OR COMPOSITION |
| Outside Diameter | 4.141 INCHES NOMINAL IN |
| Aperture Diameter | 4.047 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
NSN 5330-00-641-6516 is a Gasket, manufactured by Sealcraft Corporation, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-641-6516 has 3 manufacturer part numbers on file: 21477 (Dept of Defence (air Force)raaf Stt Alms), 21477 (Jet Aviation Australia Pty Ltd), 21477 (Sealcraft Corporation).
3 possible matches (shared part number, not a government interchangeability claim): 5915-00-863-2276, 5930-00-944-6937, 5340-00-977-9331. Verify interchangeability with system specifications before substitution.
Key specifications for 21477: FSC Application Data: ENGINE,GASOLINE; Cross-Sectional Thickness: 0.094 INCHES NOMINAL IN; Hardness Rating: 70.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM OVERALL; Style Designator: CIRCULAR. 8 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.