The Retainer,packing, cataloged under National Stock Number 5330-01-129-0446, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Epd. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-129-0446 |
| Primary Part Number | 311280 |
| Item Name | Retainer,packing |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Cross-Sectional Height | 2.870 INCHES NOMINAL IN |
| Material Document and Classification | MIL-C-15726 MIL SPEC ALL MATERIAL RESPONSES OVERALL |
| Flanged Body Outside Diameter | 5.115 INCHES MINIMUM AND 5.120 INCHES MAXIMUM IN |
| Inner Groove Width | 0.750 INCHES NOMINAL IN |
| Center Hole Diameter | 4.406 INCHES MINIMUM AND 4.411 INCHES MAXIMUM IN |
| Material | COPPER ALLOY 706 OR COPPER ALLOY 715 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 5330-01-129-0446 is a Retainer,packing, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-129-0446 has 2 manufacturer part numbers on file: 311280 (Toolex, Inc Dba Toolex Inc), 311280 (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for 311280: Cross-Sectional Height: 2.870 INCHES NOMINAL IN; Material Document and Classification: MIL-C-15726 MIL SPEC ALL MATERIAL RESPONSES OVERALL; Flanged Body Outside Diameter: 5.115 INCHES MINIMUM AND 5.120 INCHES MAXIMUM IN; Inner Groove Width: 0.750 INCHES NOMINAL IN. 6 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.