The O-Ring, cataloged under National Stock Number 5331-01-528-9446, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple. Government technical data includes 5 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-528-9446 |
| Primary Part Number | 016-003749-0003 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple |
| Status | ACTIVE |
| Cross-Sectional Height | 0.094 INCHES NOMINAL IN |
| Hardness Rating | 50.0 SHORE DUROMETER A NOMINAL |
| Material Document and Classification | ASTM D2240 ASSN STD SINGLE MATERIAL RESPONSE |
| Center Hole Diameter | 0.852 INCHES MINIMUM AND 0.872 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROSILICONE CLASS FQ |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AS568-118-50FSE | Apple Rubber Products, Inc. Dba Apple Rubber Products Inc (USA) |
| 016-003749-0003 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple (USA) |
NSN 5331-01-528-9446 is a O-Ring, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-528-9446 has 2 manufacturer part numbers on file: AS568-118-50FSE (Apple Rubber Products, Inc. Dba Apple Rubber Products Inc), 016-003749-0003 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple).
Key specifications for 016-003749-0003: Cross-Sectional Height: 0.094 INCHES NOMINAL IN; Hardness Rating: 50.0 SHORE DUROMETER A NOMINAL; Material Document and Classification: ASTM D2240 ASSN STD SINGLE MATERIAL RESPONSE; Center Hole Diameter: 0.852 INCHES MINIMUM AND 0.872 INCHES MAXIMUM IN. 5 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.