The O-Ring, cataloged under National Stock Number 5331-00-061-8426, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Brp Us Inc. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5331-00-061-8426 |
| Primary Part Number | 305123 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Brp Us Inc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Center Hole Diameter | 3.719 INCHES MINIMUM AND 3.749 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 |
|---|---|
| 305123 | Lewmar Ltd (GBR) |
| 0305123 | Lewmar Ltd (GBR) |
| 305123 PRIMARY | Brp Us Inc (USA) |
| Reference | Meaning |
|---|---|
| 305123 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 305123 | 5/9 Secondary reference Simpson-Lawrence Ltd Johnson and Evi Rude Outboard Motors |
| 0305123 | 5/9 Secondary reference Simpson-Lawrence Ltd Johnson and Evi Rude Outboard Motors |
| 305123 | 5/9 Secondary reference Outboard Marine Corp Johnson Motors Div |
NSN 5331-00-061-8426 is a O-Ring, manufactured by Brp Us Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-061-8426 has 3 manufacturer part numbers on file: 305123 (Lewmar Ltd), 0305123 (Lewmar Ltd), 305123 (Brp Us Inc).
3 possible matches (shared part number, not a government interchangeability claim): 5905-00-160-5945, 5905-00-434-5251, 5975-01-300-5650. Verify interchangeability with system specifications before substitution.
Key specifications for 305123: Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Center Hole Diameter: 3.719 INCHES MINIMUM AND 3.749 INCHES MAXIMUM IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 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.