The Cap,valve, cataloged under National Stock Number 1650-01-451-3791, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 1650-01-451-3791 |
| Item Name | Cap,valve |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Status | ACTIVE |
| Material | ALUMINUM ALLOY |
| Attachment Method | THREADED |
| 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 |
|---|---|
| 1402R004 ITEM 13 | 5/2 Secondary reference U.S. Government activity |
| 541R066 | 3/2 Design control — primary reference U.S. Government activity |
| 1402R004 | D/9 Drawing number reference only U.S. Government activity |
NSN 1650-01-451-3791 is a Cap,valve, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 1650-01-451-3795, 4820-01-451-4098, 4820-01-451-4102. Verify interchangeability with system specifications before substitution.
Key specifications for 1650-01-451-3791: Special Features: ANODIZED AMS 4119 ALUMINUM THREADED HOUSING FOR FLUID REGULATORS CORP. P/N BD2445-01 PRIORITY VALVE; End Item Identification: W/S ATF, AIRCRAFT,(AC-130A, AC-130H, MC-130H, EC-130E, HC-130) A; Material: ALUMINUM ALLOY; Attachment Method: THREADED. 2 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.