The Seat,valve, cataloged under National Stock Number 4820-01-184-6567, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-184-6567 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Taper Minor Diameter | 0.500 INCHES NOMINAL IN |
| Criticality Code Justification | ZZZY |
| Style Designator | THREADED FLANGED |
| Taper Major Diameter | 0.531 INCHES NOMINAL IN |
| Body Inside Diameter | 0.500 INCHES NOMINAL IN |
| Nominal Thread Size | 1.000 INCHES SINGLE THREADED PORTION IN |
| Taper Length | 0.031 INCHES NOMINAL IN |
| Thread Class | 2A SINGLE THREADED PORTION A |
| Thread Quantity Per Inch | 16 SINGLE THREADED PORTION |
| Material | COPPER ALLOY OVERALL |
| Seat Angle in Deg | 44.917 MINIMUM AND 45.083 MAXIMUM |
| Thread Series Designator | UN SINGLE THREADED PORTION |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Seating Surface Shape | ANGULAR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | C |
| Reference | Meaning |
|---|---|
| UD 4046 VB | 3/1 Design control — primary reference Gardner Denver Nash Llc Dba Gardner Denver Engineered Products Group Div Gardner Denver Nash |
| AA-784 PIECE 14 | 5/1 Secondary reference Gardner Denver Nash Llc Dba Gardner Denver Engineered Products Group Div Gardner Denver Nash |
NSN 4820-01-184-6567 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-184-6567: Taper Minor Diameter: 0.500 INCHES NOMINAL IN; Criticality Code Justification: ZZZY; Style Designator: THREADED FLANGED; Taper Major Diameter: 0.531 INCHES NOMINAL IN. 14 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.
NSN 4820-01-184-6567 has DEMIL Code F. Demilitarization may be required before disposal or transfer to non-military entities.
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.