The Seat,valve, cataloged under National Stock Number 4820-01-020-6964, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Honeywell International, Inc Div Aerospace-Tucson. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-020-6964 |
| Primary Part Number | 147099-1 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Honeywell International, Inc Div Aerospace-Tucson |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.230 INCHES NOMINAL IN |
| Flange Diameter | 1.375 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 1,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Outside Diameter | 0.820 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Seating Surface Shape | RADIAL |
| 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 |
|---|---|
| 147099-1 PRIMARY | Honeywell International, Inc Div Aerospace-Tucson (USA) |
| Reference | Meaning |
|---|---|
| 147099-1 | 5/9 Secondary reference Honeywell International Inc. Div Aerospace - Torrance |
NSN 4820-01-020-6964 is a Seat,valve, manufactured by Honeywell International, Inc Div Aerospace-Tucson, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-020-6964 has 1 manufacturer part number on file: 147099-1 (Honeywell International, Inc Div Aerospace-Tucson).
Key specifications for 147099-1: Flange Seat to Disk End Height: 0.230 INCHES NOMINAL IN; Flange Diameter: 1.375 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-A-8625,TYPE 1,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Body Outside Diameter: 0.820 INCHES NOMINAL IN. 9 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.