The O-Ring, cataloged under National Stock Number 5331-00-815-7994, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Lydall Inc Elastomer Products Group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-815-7994 |
| Primary Part Number | HR166-282 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Lydall Inc Elastomer Products Group |
| Status | ACTIVE |
| Temp Rating | -10.0 FAHRENHEIT AND 300.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Hardness Rating | 70.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 0.669 INCHES MINIMUM AND 0.679 INCHES MAXIMUM IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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 |
|---|---|
| HR166-282 PRIMARY | Lydall Inc Elastomer Products Group (USA) |
| 8350826 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| A512-7 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| 2930-70 PRIMARY | Parco, Llc (USA) |
| Reference | Meaning |
|---|---|
| 24801041260 | 5/9 Secondary reference Sapa Operaciones SL |
| A1716 | 3/2 Design control — primary reference U.S. Government activity |
| 2222620 | 5/9 Secondary reference Allison Transmission Inc Dba Allison Transmission, Inc |
| 5331008157994 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 2222620 | 5/9 Secondary reference General Motors Corp |
| 5330008157994 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
NSN 5331-00-815-7994 is a O-Ring, manufactured by Lydall Inc Elastomer Products Group, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-815-7994 has 4 manufacturer part numbers on file: HR166-282 (Lydall Inc Elastomer Products Group), 8350826 (U S Army Tank Automotive Command Amsta-Im-Mm), A512-7 (Parker-Hannifin Corp Div O-Ring Division), 2930-70 (Parco, Llc).
6 possible matches (shared part number, not a government interchangeability claim): 5331-00-853-2237, 5331-00-905-9823, 5330-01-177-8030. Verify interchangeability with system specifications before substitution.
Key specifications for HR166-282: Temp Rating: -10.0 FAHRENHEIT AND 300.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL; Center Hole Diameter: 0.669 INCHES MINIMUM AND 0.679 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.