The Back-Up Ring,preformed Packing, cataloged under National Stock Number 5330-01-501-1789, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Gulf Coast Seal, Ltd.. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-501-1789 |
| Primary Part Number | 8-233N0300-90 |
| Item Name | Back-Up Ring,preformed Packing |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Gulf Coast Seal, Ltd. |
| Status | ACTIVE |
| Temp Rating | -65.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.050 INCHES NOMINAL IN |
| Hardness Rating | 90.0 SHORE DUROMETER A NOMINAL |
| Material Document and Classification | (02697)N0300 MFR REF SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | CONTOURED FACE SOLID |
| Peripheral Diameter | 3.117 INCHES NOMINAL IN |
| Center Hole Diameter | 2.881 INCHES NOMINAL IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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 |
|---|---|
| 8-233N0300-90 PRIMARY | Gulf Coast Seal, Ltd. (USA) |
NSN 5330-01-501-1789 is a Back-Up Ring,preformed Packing, manufactured by Gulf Coast Seal, Ltd., classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-501-1789 has 1 manufacturer part number on file: 8-233N0300-90 (Gulf Coast Seal, Ltd.).
Key specifications for 8-233N0300-90: Temp Rating: -65.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.050 INCHES NOMINAL IN; Hardness Rating: 90.0 SHORE DUROMETER A NOMINAL; Material Document and Classification: (02697)N0300 MFR REF SINGLE MATERIAL RESPONSE. 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.