The Retainer,packing, cataloged under National Stock Number 5330-01-330-0503, 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 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5330-01-330-0503 |
| Primary Part Number | 803-5959304 |
| Item Name | Retainer,packing |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Attachment Hole Diameter | 0.406 INCHES NOMINAL IN |
| Attachment Feature Quantity | 4 |
| Cross-Sectional Thickness | 0.367 INCHES NOMINAL IN |
| Cross-Sectional Height | 0.750 INCHES NOMINAL IN |
| Material Document and Classification | ASTM B443 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM B446 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Rim Surface Width | 0.500 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | FLANGE |
| Attachment Feature Circle Diameter | 4.000 INCHES NOMINAL SINGLE CIRCLE IN |
| Peripheral Diameter | 4.750 INCHES NOMINAL IN |
| Center Hole Diameter | 2.515 INCHES MINIMUM AND 2.525 INCHES MAXIMUM IN |
| Material | NICKEL ALLOY 625 OVERALL |
| Attachment Method | ROUND HOLE |
| 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 |
|---|---|
| 803-5959304 PRIMARY | Naval Sea Systems Command (USA) |
| 803-5959304-X-44 | Naval Sea Systems Command (USA) |
| 256-6603687-VHBM-52 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 5959304-44 | 5/9 Secondary reference U.S. Government activity |
NSN 5330-01-330-0503 is a Retainer,packing, manufactured by Naval Sea Systems Command, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-330-0503 has 3 manufacturer part numbers on file: 803-5959304 (Naval Sea Systems Command), 803-5959304-X-44 (Naval Sea Systems Command), 256-6603687-VHBM-52 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 5342-01-330-8839, 5330-01-596-7236. Verify interchangeability with system specifications before substitution.
Key specifications for 803-5959304: Attachment Hole Diameter: 0.406 INCHES NOMINAL IN; Attachment Feature Quantity: 4; Cross-Sectional Thickness: 0.367 INCHES NOMINAL IN; Cross-Sectional Height: 0.750 INCHES NOMINAL IN. 12 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.