The Retainer,seal, cataloged under National Stock Number 5330-00-477-1990, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-00-477-1990 |
| Primary Part Number | AFS-1-521-2072838PC26 |
| Item Name | Retainer,seal |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flange Thickness | 0.500 INCHES NOMINAL IN |
| Body Outside Diameter | 4.092 INCHES MINIMUM AND 4.094 INCHES MAXIMUM IN |
| Style Designator | FLANGED |
| Bolt Hole Diameter | 0.406 INCHES NOMINAL IN |
| Seal Seat Diameter | 3.313 INCHES NOMINAL IN |
| Aperture Diameter | 2.562 INCHES NOMINAL IN |
| Bolt Hole Quantity | 6 |
| Bolt Circle Diameter | 5.250 INCHES NOMINAL IN |
| Mounting Flange Diameter | 6.375 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Seal Seat Depth | 0.688 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AFS-1-521-2072838PC26 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 330-521-23-26 | 5/9 Secondary reference U.S. Government activity |
NSN 5330-00-477-1990 is a Retainer,seal, manufactured by Naval Sea Systems Command, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-477-1990 has 1 manufacturer part number on file: AFS-1-521-2072838PC26 (Naval Sea Systems Command).
Key specifications for AFS-1-521-2072838PC26: Overall Height: 0.875 INCHES NOMINAL IN; Flange Thickness: 0.500 INCHES NOMINAL IN; Body Outside Diameter: 4.092 INCHES MINIMUM AND 4.094 INCHES MAXIMUM IN; Style Designator: FLANGED. 11 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.