The O-Ring, cataloged under National Stock Number 5331-01-645-8210, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-645-8210 |
| Primary Part Number | 1201T27 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Cross-Sectional Height | 0.070 INCHES NOMINAL IN |
| Outside Diameter | 0.754 INCHES NOMINAL IN |
| Color | BLACK |
| Center Hole Diameter | 0.614 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC |
| 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 |
|---|---|
| 001-000261-000 | Insitu Pacific Pty Ltd (AUS) |
| 1201T27 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 5331-01-645-8210 is a O-Ring, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-645-8210 has 2 manufacturer part numbers on file: 001-000261-000 (Insitu Pacific Pty Ltd), 1201T27 (Mcmaster-Carr Supply Co).
Key specifications for 1201T27: Cross-Sectional Height: 0.070 INCHES NOMINAL IN; Outside Diameter: 0.754 INCHES NOMINAL IN; Color: BLACK; Special Features: ROHS COMPLIANT; CHEMICAL RESISTANT. 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.