The Cap,filler Opening, cataloged under National Stock Number 2930-01-050-7397, is classified within Federal Supply Class 2930 (Engine Cooling System Components, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 2930-01-050-7397 |
| Primary Part Number | 31809AX |
| Item Name | Cap,filler Opening |
| FSC / FSG | 2930 / 29 — Engine Cooling System Components, Nonaircraft |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Accommodation Type | KNURLED END GRIPPING |
| Style Designator | INSIDE CAM TYPE |
| Filler Neck Diameter for Which Designed | 2.656 INCHES NOMINAL IN |
| Outside Diameter | 4.000 INCHES NOMINAL IN |
| Cam Quantity | 2 |
| Features Provided | INTEGRAL VACUUM RELIEF VALVE |
| System for Which Designed | PRESSURIZED |
| Pressure Relief Method | AUTOMATIC |
| Color | SILVER |
| Surface Treatment | CHROMIUM BODY |
| Maximum Working Pressure | 7.000 POUNDS PER SQUARE INCH (PSI) LBS |
| Material | STEEL AND COPPER ALLOY OVERALL |
| Sealing Length | 1.000 INCHES NOMINAL IN |
| 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 |
|---|---|
| 31809AX PRIMARY | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 31809AX | 5/9 Secondary reference Oshkosh Corp |
NSN 2930-01-050-7397 is a Cap,filler Opening, manufactured by Oshkosh Defense Llc, classified under FSC 2930, Engine Cooling System Components, Nonaircraft. Status: active.
NSN 2930-01-050-7397 has 1 manufacturer part number on file: 31809AX (Oshkosh Defense Llc).
Key specifications for 31809AX: Overall Height: 1.588 INCHES NOMINAL IN; Accommodation Type: KNURLED END GRIPPING; Style Designator: INSIDE CAM TYPE; Filler Neck Diameter for Which Designed: 2.656 INCHES NOMINAL IN. 13 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.