The O-Ring, cataloged under National Stock Number 5331-00-921-0856, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Avionics Specialties, Inc.. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-00-921-0856 |
| Primary Part Number | 913-226-4 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Avionics Specialties, Inc. |
| Status | ACTIVE |
| Cross-Sectional Height | 0.027 INCHES MINIMUM AND 0.033 INCHES MAXIMUM IN |
| Center Hole Diameter | 2.105 INCHES MINIMUM AND 2.115 INCHES MAXIMUM IN |
| Material | RUBBER SYNTHETIC |
| 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 |
|---|---|
| 913-226-4 | Mechanical Rubber Products Company, Inc. Dba Mechanical Rubber Prdts Co Inc Div Mechanical Rubber Products Co., Inc. (USA) |
| 913-226-4 PRIMARY | Avionics Specialties, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 913-226-4 | 5/2 Secondary reference U.S. Government activity |
NSN 5331-00-921-0856 is a O-Ring, manufactured by Avionics Specialties, Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-921-0856 has 2 manufacturer part numbers on file: 913-226-4 (Mechanical Rubber Products Company, Inc. Dba Mechanical Rubber Prdts Co Inc Div Mechanical Rubber Products Co., Inc.), 913-226-4 (Avionics Specialties, Inc.).
Key specifications for 913-226-4: Cross-Sectional Height: 0.027 INCHES MINIMUM AND 0.033 INCHES MAXIMUM IN; Center Hole Diameter: 2.105 INCHES MINIMUM AND 2.115 INCHES MAXIMUM IN; Material: RUBBER SYNTHETIC. 3 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.