The Seat,valve, cataloged under National Stock Number 4820-00-677-5674, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road). Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-00-677-5674 |
| Primary Part Number | 42C74 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.140 INCHES NOMINAL IN |
| Flange Diameter | 0.250 INCHES NOMINAL IN |
| Thread Length | 0.045 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Style Designator | FAUCET |
| Material Document and Classification | MIL-S-7720,COMP 302,COND G MIL SPEC ALL MATERIAL RESPONSES OVERALL |
| Body Inside Diameter | 0.093 INCHES NOMINAL IN |
| Nominal Thread Size | 0.312 INCHES SINGLE THREADED PORTION IN |
| Surface Treatment | PASSIVATE OVERALL |
| Under Flange Height | 0.140 INCHES NOMINAL IN |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF SINGLE THREADED PORTION |
| 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 |
|---|---|
| 42C74 PRIMARY | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA) |
| Reference | Meaning |
|---|---|
| 42C74 | 5/9 Secondary reference Grimes Aerospace Company |
NSN 4820-00-677-5674 is a Seat,valve, manufactured by Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road), classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-677-5674 has 1 manufacturer part number on file: 42C74 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)).
Key specifications for 42C74: Flange Seat to Disk End Height: 0.140 INCHES NOMINAL IN; Flange Diameter: 0.250 INCHES NOMINAL IN; Thread Length: 0.045 INCHES NOMINAL SINGLE THREADED PORTION IN; Style Designator: FAUCET. 13 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.