The O-Ring, cataloged under National Stock Number 5331-00-580-4145, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Motion & Flow Control Products, Inc. Dba Controlled Motion Solutions. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-580-4145 |
| Primary Part Number | S2439939-212 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Motion & Flow Control Products, Inc. Dba Controlled Motion Solutions |
| Status | ACTIVE |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Center Hole Diameter | 0.853 INCHES MINIMUM AND 0.865 INCHES MAXIMUM IN |
| Material | RUBBER SILICONE CLASS Q |
| 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 |
|---|---|
| S2439939-212 | Motion & Flow Control Products, Inc. Dba Controlled Motion Solutions (USA) |
| S2439939-212 | Proponent, Inc. Dba Proponent (USA) |
| Reference | Meaning |
|---|---|
| S2439939-212 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5331-00-580-4145 is a O-Ring, manufactured by Motion & Flow Control Products, Inc. Dba Controlled Motion Solutions, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-580-4145 has 2 manufacturer part numbers on file: S2439939-212 (Motion & Flow Control Products, Inc. Dba Controlled Motion Solutions), S2439939-212 (Proponent, Inc. Dba Proponent).
Key specifications for S2439939-212: Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Center Hole Diameter: 0.853 INCHES MINIMUM AND 0.865 INCHES MAXIMUM IN; Material: RUBBER SILICONE CLASS Q. 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.