The O-Ring, cataloged under National Stock Number 5331-01-564-0109, 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 5 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-564-0109 |
| Primary Part Number | B1000-1.78 X 139.70 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Marco Rubber & Plastics, Llc Dba Marco Rubber & Plastics |
| Status | ACTIVE |
| Temp Rating | 120.0 FAHRENHEIT DEGF |
| Hardness Rating | 70.0 SHORE DUROMETER A NOMINAL |
| Color | BLACK |
| Center Hole Diameter | 1.780 INCHES NOMINAL IN |
| Material | RUBBER BUTADIENE NITRILE |
| 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 |
|---|---|
| B1000-1.78 X 139.70 PRIMARY | Marco Rubber & Plastics, Llc Dba Marco Rubber & Plastics (USA) |
NSN 5331-01-564-0109 is a O-Ring, manufactured by Marco Rubber & Plastics, Llc Dba Marco Rubber & Plastics, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-564-0109 has 1 manufacturer part number on file: B1000-1.78 X 139.70 (Marco Rubber & Plastics, Llc Dba Marco Rubber & Plastics).
Key specifications for B1000-1.78 X 139.70: Temp Rating: 120.0 FAHRENHEIT DEGF; Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL; Color: BLACK; Center Hole Diameter: 1.780 INCHES NOMINAL 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.