The O-Ring, cataloged under National Stock Number 5331-01-353-2068, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is DC Fabricators Inc. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-353-2068 |
| Primary Part Number | CW-686ATB |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | DC Fabricators Inc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN |
| Center Hole Diameter | 50.250 INCHES MINIMUM AND 50.750 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROCARBON CLASS FPM |
| 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 |
|---|---|
| 686ATB | DC Fabricators Inc (USA) |
| CW-2300CW PIECE 621 | DC Fabricators Inc (USA) |
| CW-686ATB PRIMARY | DC Fabricators Inc (USA) |
| Reference | Meaning |
|---|---|
| CW-686ATA SYMBOL 686ATB | 5/9 Secondary reference DC Fabricators Inc |
NSN 5331-01-353-2068 is a O-Ring, manufactured by DC Fabricators Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-353-2068 has 3 manufacturer part numbers on file: 686ATB (DC Fabricators Inc), CW-2300CW PIECE 621 (DC Fabricators Inc), CW-686ATB (DC Fabricators Inc).
Key specifications for CW-686ATB: Cross-Sectional Height: 0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN; Center Hole Diameter: 50.250 INCHES MINIMUM AND 50.750 INCHES MAXIMUM IN; Material: RUBBER FLUOROCARBON CLASS FPM. 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.