The Seat,valve, cataloged under National Stock Number 4820-00-586-0580, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tescom Corp Dba Tescom Div Tescom. Government technical data includes 6 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 | 4820-00-586-0580 |
| Primary Part Number | 503-4C |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tescom Corp Dba Tescom Div Tescom |
| Status | ACTIVE |
| Body Outside Diameter | 0.405 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Material Document and Classification | MIL-M-20693 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.068 INCHES NOMINAL IN |
| Material | PLASTIC POLYAMIDE NYLON OVERALL |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| 503-4C PRIMARY | Tescom Corp Dba Tescom Div Tescom (USA) |
NSN 4820-00-586-0580 is a Seat,valve, manufactured by Tescom Corp Dba Tescom Div Tescom, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-586-0580 has 1 manufacturer part number on file: 503-4C (Tescom Corp Dba Tescom Div Tescom).
Key specifications for 503-4C: Overall Height: 0.168 INCHES NOMINAL IN; Body Outside Diameter: 0.405 INCHES NOMINAL IN; Style Designator: PLAIN; Material Document and Classification: MIL-M-20693 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 6 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.