The O-Ring, cataloged under National Stock Number 5331-01-616-9427, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Frontgrade Technologies Inc.. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-616-9427 |
| Primary Part Number | 2099-823 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Frontgrade Technologies Inc. |
| Status | ACTIVE |
| Cross-Sectional Height | 0.250 INCHES NOMINAL IN |
| Color | BLACK |
| Center Hole Diameter | 25.700 INCHES NOMINAL IN |
| Material | RUBBER ETHYLENE-PROPYLENE-DIENE CLASS EPDM |
| 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 |
|---|---|
| 2099-823 PRIMARY | Frontgrade Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| 2099-823 | 3/9 Design control — primary reference Cobham Exeter, Inc. |
NSN 5331-01-616-9427 is a O-Ring, manufactured by Frontgrade Technologies Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-616-9427 has 1 manufacturer part number on file: 2099-823 (Frontgrade Technologies Inc.).
Key specifications for 2099-823: Cross-Sectional Height: 0.250 INCHES NOMINAL IN; Color: BLACK; Center Hole Diameter: 25.700 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: O-RING SEAL, RADOME. 4 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.