The O-Ring, cataloged under National Stock Number 5331-00-211-7285, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Houghton International Inc.. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-00-211-7285 |
| Primary Part Number | TEFLON-SIZE335 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Houghton International Inc. |
| Status | ACTIVE |
| Cross-Sectional Height | 0.188 INCHES NOMINAL IN |
| Center Hole Diameter | 2.750 INCHES NOMINAL IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS |
| 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 |
|---|---|
| TEFLON-SIZE335 | Houghton International Inc. (USA) |
| SIZE335 | Houghton International Inc. (USA) |
| Reference | Meaning |
|---|---|
| 335 | 3/1 Design control — primary reference Houghton International Inc. |
NSN 5331-00-211-7285 is a O-Ring, manufactured by Houghton International Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-211-7285 has 2 manufacturer part numbers on file: TEFLON-SIZE335 (Houghton International Inc.), SIZE335 (Houghton International Inc.).
Key specifications for TEFLON-SIZE335: Cross-Sectional Height: 0.188 INCHES NOMINAL IN; Center Hole Diameter: 2.750 INCHES NOMINAL IN; Material: PLASTIC POLYTETRAFLUOROETHYLENE; Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS. 4 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.