The O-Ring, cataloged under National Stock Number 5331-00-074-3773, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-00-074-3773 |
| Primary Part Number | 4L8337 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Cross-Sectional Height | 0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN |
| Center Hole Diameter | 3.210 INCHES MINIMUM AND 3.240 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 |
|---|---|
| 4L8337 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| 4L-8337 | Navantia - Propulsion Y Energia Motores - Cartagena (ESP) |
| 4L8337 | Compagnia Generale Trattori -S.p.a. Abbreviata C.g.t.-S.p.a. (ITA) |
| Reference | Meaning |
|---|---|
| 4L8337 | 5/9 Secondary reference Holt Bros |
NSN 5331-00-074-3773 is a O-Ring, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-074-3773 has 3 manufacturer part numbers on file: 4L8337 (Caterpillar Inc Div Caterpillar Defense), 4L-8337 (Navantia - Propulsion Y Energia Motores - Cartagena), 4L8337 (Compagnia Generale Trattori -S.p.a. Abbreviata C.g.t.-S.p.a.).
Key specifications for 4L8337: Cross-Sectional Height: 0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN; Center Hole Diameter: 3.210 INCHES MINIMUM AND 3.240 INCHES MAXIMUM IN; End Item Identification: LOGISTICS SUPPORT VESSEL; 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.