The Gasket, cataloged under National Stock Number 5330-00-965-5525, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Unicontrol Inc Hays Cleveland Div. Government technical data includes 8 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-00-965-5525 |
| Primary Part Number | 537-52 |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Unicontrol Inc Hays Cleveland Div |
| Status | ACTIVE |
| Cross-Sectional Thickness | 0.250 INCHES NOMINAL IN |
| Hardness Rating | 55.0 SHORE DUROMETER A MINIMUM AND 70.0 SHORE DUROMETER A MAXIMUM OVERALL |
| Style Designator | CIRCULAR |
| Material Document and Classification | MIL-C-6183,TY 1,CL 2,GR B MIL SPEC ALL MATERIAL RESPONSES OVERALL |
| Cross-Sectional Shape Style | SOLID SINGLE OR COMPOSITION |
| Outside Diameter | 0.688 INCHES NOMINAL IN |
| Aperture Diameter | 0.406 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC AND CORK 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 |
|---|---|
| 537-52 PRIMARY | Unicontrol Inc Hays Cleveland Div (USA) |
NSN 5330-00-965-5525 is a Gasket, manufactured by Unicontrol Inc Hays Cleveland Div, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-965-5525 has 1 manufacturer part number on file: 537-52 (Unicontrol Inc Hays Cleveland Div).
1 possible match (shared part number, not a government interchangeability claim): 6220-01-041-6559. Verify interchangeability with system specifications before substitution.
Key specifications for 537-52: Cross-Sectional Thickness: 0.250 INCHES NOMINAL IN; Hardness Rating: 55.0 SHORE DUROMETER A MINIMUM AND 70.0 SHORE DUROMETER A MAXIMUM OVERALL; Style Designator: CIRCULAR; Material Document and Classification: MIL-C-6183,TY 1,CL 2,GR B MIL SPEC ALL MATERIAL RESPONSES OVERALL. 8 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.