The Cap,filler Opening, cataloged under National Stock Number 2930-01-240-6121, is classified within Federal Supply Class 2930 (Engine Cooling System Components, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Gates Corporation. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 2930-01-240-6121 |
| Primary Part Number | 31311 |
| Item Name | Cap,filler Opening |
| FSC / FSG | 2930 / 29 — Engine Cooling System Components, Nonaircraft |
| Manufacturer | Gates Corporation |
| Status | ACTIVE |
| Style Designator | CLOSED COOLING SYSTEM TYPE |
| Outside Diameter | 2.250 INCHES NOMINAL IN |
| System for Which Designed | PRESSURIZED |
| Pressure Relief Method | AUTOMATIC |
| Maximum Working Pressure | 14.000 POUNDS PER SQUARE INCH (PSI) LBS |
| Material | STEEL CORROSION RESISTING OVERALL |
| Sealing Length | 0.750 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 |
|---|---|
| 31311 PRIMARY | Gates Corporation (USA) |
| Reference | Meaning |
|---|---|
| E2FZ8100A | 5/9 Secondary reference Ford Motor Company |
| E2FZ8100A | 5/9 Secondary reference Ford Motor Co Ford Parts and Service Div Government Part Sales |
NSN 2930-01-240-6121 is a Cap,filler Opening, manufactured by Gates Corporation, classified under FSC 2930, Engine Cooling System Components, Nonaircraft. Status: active.
NSN 2930-01-240-6121 has 1 manufacturer part number on file: 31311 (Gates Corporation).
5 possible matches (shared part number, not a government interchangeability claim): 3110-01-316-1795, 8110-01-334-3149, 5110-01-429-6550. Verify interchangeability with system specifications before substitution.
Key specifications for 31311: Style Designator: CLOSED COOLING SYSTEM TYPE; Outside Diameter: 2.250 INCHES NOMINAL IN; System for Which Designed: PRESSURIZED; Pressure Relief Method: AUTOMATIC. 7 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.