The Seat,valve, cataloged under National Stock Number 4820-00-992-8504, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Clayton Manufacturing Company. Government technical data includes 8 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-992-8504 |
| Primary Part Number | UH13867 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Clayton Manufacturing Company |
| Status | ACTIVE |
| Body Outside Diameter | 0.495 INCHES NOMINAL IN |
| Hardness Rating | 53.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM BODY |
| Hardness Rating | 53.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM FACE |
| Style Designator | PLAIN |
| Body Inside Diameter | 0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Seat Angle in Deg | 45.000 NOMINAL |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| UH13867 PRIMARY | Clayton Manufacturing Company (USA) |
NSN 4820-00-992-8504 is a Seat,valve, manufactured by Clayton Manufacturing Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-992-8504 has 1 manufacturer part number on file: UH13867 (Clayton Manufacturing Company).
Key specifications for UH13867: Overall Height: 0.156 INCHES NOMINAL IN; Body Outside Diameter: 0.495 INCHES NOMINAL IN; Hardness Rating: 53.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM BODY; Hardness Rating: 53.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM FACE. 8 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.