The Gasket, cataloged under National Stock Number 5330-00-526-5997, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Mitchel Field. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5330-00-526-5997 |
| Primary Part Number | 56-363 |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| FSC Application Data | NAVIGATIONAL INSTRUMENT |
| Cross-Sectional Thickness | 0.175 INCHES NOMINAL IN |
| Inside Corner Radius | 0.380 INCHES NOMINAL IN |
| Hardness Rating | 45.0 SHORE DUROMETER A MINIMUM AND 55.0 SHORE DUROMETER A MAXIMUM OVERALL |
| Style Designator | NON-CIRCULAR |
| Cross-Sectional Shape Style | SOLID SINGLE OR COMPOSITION |
| Aperture Width | 4.126 INCHES NOMINAL IN |
| Aperture Length | 7.876 INCHES NOMINAL IN |
| Outside Corner Radius | 0.520 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 |
| Part Number | Manufacturer |
|---|---|
| 56-363 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| Reference | Meaning |
|---|---|
| D371 | 5/9 Secondary reference Andrea Electronics Corporation |
NSN 5330-00-526-5997 is a Gasket, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-526-5997 has 1 manufacturer part number on file: 56-363 (Lockheed Martin Corporation Div Rms - Mitchel Field).
2 possible matches (shared part number, not a government interchangeability claim): 5950-00-927-8547, 5985-01-556-1254. Verify interchangeability with system specifications before substitution.
Key specifications for 56-363: FSC Application Data: NAVIGATIONAL INSTRUMENT; Cross-Sectional Thickness: 0.175 INCHES NOMINAL IN; Inside Corner Radius: 0.380 INCHES NOMINAL IN; Hardness Rating: 45.0 SHORE DUROMETER A MINIMUM AND 55.0 SHORE DUROMETER A MAXIMUM OVERALL. 10 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.