The Seat,valve, cataloged under National Stock Number 4820-01-212-2501, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Graham-White Manufacturing Co Div Graham-White Manufacturing Co. Inc.. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-212-2501 |
| Primary Part Number | 3136-1 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Graham-White Manufacturing Co Div Graham-White Manufacturing Co. Inc. |
| Status | ACTIVE |
| Body Outside Diameter | 1.001 INCHES NOMINAL IN |
| Hardness Rating | 70.0 DUROMETER NOMINAL OVERALL |
| Style Designator | PLAIN |
| Body Inside Diameter | 0.685 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC-NATURAL 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 |
NSN 4820-01-212-2501 is a Seat,valve, manufactured by Graham-White Manufacturing Co Div Graham-White Manufacturing Co. Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-212-2501 has 2 manufacturer part numbers on file: 3136-1 (Graham-White Manufacturing Co Div Graham-White Manufacturing Co. Inc.), 3136 (Graham-White Manufacturing Co Div Graham-White Manufacturing Co. Inc.).
Key specifications for 3136-1: Overall Height: 0.098 INCHES NOMINAL IN; Body Outside Diameter: 1.001 INCHES NOMINAL IN; Hardness Rating: 70.0 DUROMETER NOMINAL OVERALL; Style Designator: PLAIN. 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.