The Packing,preformed, cataloged under National Stock Number 5330-00-993-0517, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corp. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-00-993-0517 |
| Primary Part Number | 55E21-012 |
| Item Name | Packing,preformed |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Lockheed Martin Corp |
| Status | ACTIVE |
| Cross-Sectional Height | 0.062 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | O-RING |
| Center Hole Diameter | 0.375 INCHES NOMINAL IN |
| Material | PLASTIC TETRAFLUOROETHYLENE OVERALL |
| 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 |
|---|---|
| 55E21-012 | Lockheed Martin Corporation Div Rotary and Mission Systems (USA) |
| 2-12T | Trelleborg Sealing Solutions Us, Inc. (USA) |
| 55E21-012 PRIMARY | Lockheed Martin Corp (USA) |
| Reference | Meaning |
|---|---|
| 2-12T | 5/9 Secondary reference Trelleborg Sealing Solutions El Segundo, Inc. Dba Tss El Segundo |
NSN 5330-00-993-0517 is a Packing,preformed, manufactured by Lockheed Martin Corp, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-993-0517 has 3 manufacturer part numbers on file: 55E21-012 (Lockheed Martin Corporation Div Rotary and Mission Systems), 2-12T (Trelleborg Sealing Solutions Us, Inc.), 55E21-012 (Lockheed Martin Corp).
Key specifications for 55E21-012: Cross-Sectional Height: 0.062 INCHES NOMINAL IN; Cross-Sectional Shape Style: O-RING; Center Hole Diameter: 0.375 INCHES NOMINAL IN; Material: PLASTIC TETRAFLUOROETHYLENE OVERALL. 4 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.