The Cap,filler Opening, cataloged under National Stock Number 2930-00-428-1776, is classified within Federal Supply Class 2930 (Engine Cooling System Components, Nonaircraft) of the Engine Accessories group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 2930-00-428-1776 |
| Item Name | Cap,filler Opening |
| FSC / FSG | 2930 / 29 — Engine Cooling System Components, Nonaircraft |
| Status | ACTIVE |
| Accommodation Type | LUGS END GRIPPING |
| Overall Diameter | 3.625 INCHES NOMINAL IN |
| Thread Length | 0.625 INCHES NOMINAL IN |
| Retaining Device Type | CHAIN |
| Style Designator | THREADED TYPE-INTERNAL |
| Filler Neck Diameter for Which Designed | 2.000 INCHES NOMINAL IN |
| Thread Diameter | 2.000 INCHES NOMINAL IN |
| Material Document and Classification | QQ-L-225 COMP 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.750 INCHES NOMINAL IN |
| System for Which Designed | NONPRESSURIZED |
| Material | COPPER ALLOY OVERALL |
| Retaining Device Length | 6.500 INCHES NOMINAL IN |
| Thread Series Designator | NPT |
| Sealing Length | 0.625 INCHES NOMINAL IN |
| Thread Quantity | 11.500 PER INCH |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| U6414 | 3/9 Design control — primary reference Siemens Water Technologies Corp. Div Wallace & Tiernan Products |
| A170 | 5/2 Secondary reference U.S. Government activity |
NSN 2930-00-428-1776 is a Cap,filler Opening, classified under FSC 2930, Engine Cooling System Components, Nonaircraft. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 3940-00-777-5743, 5845-00-872-1649, 4310-00-911-6609. Verify interchangeability with system specifications before substitution.
Key specifications for 2930-00-428-1776: Overall Height: 1.500 INCHES NOMINAL IN; Accommodation Type: LUGS END GRIPPING; Overall Diameter: 3.625 INCHES NOMINAL IN; Thread Length: 0.625 INCHES NOMINAL IN. 15 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.