The O-Ring, cataloged under National Stock Number 5331-00-591-7943, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling. 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-591-7943 |
| Primary Part Number | 66127 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling |
| Status | ACTIVE |
| Cross-Sectional Height | 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN |
| Center Hole Diameter | 1.840 INCHES MINIMUM AND 1.860 INCHES MAXIMUM 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 |
|---|---|
| 66127 | Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling (USA) |
| 001-66127 | Tvh Parts Co. (USA) |
| Reference | Meaning |
|---|---|
| 66127 | 5/9 Secondary reference Hyster-Yale Group, Inc. |
| 01-66127 | 5/9 Secondary reference Lift Parts Mfg Co Inc Div of Echlin Mfg Co the |
| 622731 | 3/9 Design control — primary reference Federal-Mogul Corp Chassis Products Div |
| 001-66127 | 5/9 Secondary reference Lift Parts Mfg Co Inc Div of Echlin Mfg Co the |
| T-9108 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5331-00-591-7943 is a O-Ring, manufactured by Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-591-7943 has 2 manufacturer part numbers on file: 66127 (Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling), 001-66127 (Tvh Parts Co.).
5 possible matches (shared part number, not a government interchangeability claim): 5331-00-624-1855, 4320-00-690-2073, 5330-00-933-0058. Verify interchangeability with system specifications before substitution.
Key specifications for 66127: Cross-Sectional Height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN; Center Hole Diameter: 1.840 INCHES MINIMUM AND 1.860 INCHES MAXIMUM IN; Material: RUBBER SYNTHETIC. 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.