The O-Ring, cataloged under National Stock Number 5331-01-408-8566, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Marco Rubber & Plastics, Llc Dba Marco Rubber & Plastics. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-408-8566 |
| Primary Part Number | B1000-4X90 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Marco Rubber & Plastics, Llc Dba Marco Rubber & Plastics |
| Status | ACTIVE |
| Hardness Rating | 70.0 SHORE DUROMETER A MINIMUM AND 90.0 SHORE DUROMETER A MAXIMUM |
| Material Document and Classification | SAE-J120 MIL SPEC SINGLE MATERIAL RESPONSE |
| 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 |
|---|---|
| B1000-4X90 PRIMARY | Marco Rubber & Plastics, Llc Dba Marco Rubber & Plastics (USA) |
| Reference | Meaning |
|---|---|
| 932146 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division |
| 930624PC26 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division |
NSN 5331-01-408-8566 is a O-Ring, manufactured by Marco Rubber & Plastics, Llc Dba Marco Rubber & Plastics, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-408-8566 has 1 manufacturer part number on file: B1000-4X90 (Marco Rubber & Plastics, Llc Dba Marco Rubber & Plastics).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-505-6579. Verify interchangeability with system specifications before substitution.
Key specifications for B1000-4X90: Hardness Rating: 70.0 SHORE DUROMETER A MINIMUM AND 90.0 SHORE DUROMETER A MAXIMUM; Material Document and Classification: SAE-J120 MIL SPEC SINGLE MATERIAL RESPONSE; 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.