The Gasket, cataloged under National Stock Number 5330-00-303-2571, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5330-00-303-2571 |
| Primary Part Number | S1635-20110 |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Cross-Sectional Thickness | 0.046 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR METAL |
| Outside Diameter | 10.187 INCHES NOMINAL IN |
| Aperture Diameter | 7.500 INCHES NOMINAL IN |
| Bolt Circle Diameter | 7.875 INCHES NOMINAL IN |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 0.437 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| 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 |
|---|---|
| S1635-20110 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| S1635-20110 | Rotair Aerospace Corp (USA) |
| Reference | Meaning |
|---|---|
| MILS22499 | 4/1 Identification reference U.S. Government activity |
NSN 5330-00-303-2571 is a Gasket, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-303-2571 has 2 manufacturer part numbers on file: S1635-20110 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), S1635-20110 (Rotair Aerospace Corp).
Key specifications for S1635-20110: Cross-Sectional Thickness: 0.046 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR METAL; Outside Diameter: 10.187 INCHES NOMINAL IN; Aperture Diameter: 7.500 INCHES NOMINAL IN. 7 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.