The Gasket, cataloged under National Stock Number 5330-01-312-9991, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems. Government technical data includes 11 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 | 5330-01-312-9991 |
| Primary Part Number | 157D3690 |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
| Status | ACTIVE |
| Smallest Bolt Hole Quantity | 6 |
| Cross-Sectional Thickness | 0.032 INCHES NOMINAL IN |
| Largest Bolt Hole Quantity | 3 |
| Hardness Rating | 45.0 SHORE DUROMETER A MINIMUM AND 55.0 SHORE DUROMETER A MAXIMUM OVERALL |
| Material Document and Classification | MIL-R-6855,CLASS 2,TYPE A OR B,GRADE 50 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Smallest Bolt Hole Diameter | 0.176 INCHES MINIMUM AND 0.216 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | SOLID SINGLE OR COMPOSITION |
| Outside Diameter | 5.580 INCHES MINIMUM AND 5.620 INCHES MAXIMUM IN |
| Aperture Diameter | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Largest Bolt Hole Diameter | 0.730 INCHES MINIMUM AND 0.770 INCHES MAXIMUM IN |
| Material | RUBBER CHLOROPRENE CLASS CR 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 |
|---|---|
| 157D3690 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
NSN 5330-01-312-9991 is a Gasket, manufactured by General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-312-9991 has 1 manufacturer part number on file: 157D3690 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 157D3690: Smallest Bolt Hole Quantity: 6; Cross-Sectional Thickness: 0.032 INCHES NOMINAL IN; Largest Bolt Hole Quantity: 3; Hardness Rating: 45.0 SHORE DUROMETER A MINIMUM AND 55.0 SHORE DUROMETER A MAXIMUM OVERALL. 11 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.