The Seat,valve, cataloged under National Stock Number 4820-01-110-7170, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-110-7170 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.050 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN |
| Flange Diameter | 0.920 INCHES MINIMUM AND 0.923 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2470,GRAY ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Body Outside Diameter | 0.920 INCHES MINIMUM AND 0.923 INCHES MAXIMUM IN |
| Seal Accommodation Type | RECESSED |
| Body Stepped Inside Diameter | 0.499 INCHES MINIMUM AND 0.501 INCHES MAXIMUM SECOND STEP IN |
| Body Stepped Inside Diameter | 0.665 INCHES MINIMUM AND 0.685 INCHES MAXIMUM THIRD STEP IN |
| Body Stepped Inside Diameter | 0.730 INCHES MINIMUM AND 0.750 INCHES MAXIMUM FIRST STEP IN |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | AMS 4119,T351 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Surface Treatment | ANODIZE OVERALL |
| Under Flange Height | 0.235 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 2024 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 |
| Reference | Meaning |
|---|---|
| 067-017392 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple |
| 900V589 | 3/9 Design control — primary reference Grimes Aerospace Co |
NSN 4820-01-110-7170 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-110-7170: Flange Seat to Disk End Height: 0.050 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN; Flange Diameter: 0.920 INCHES MINIMUM AND 0.923 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2470,GRAY ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Body Outside Diameter: 0.920 INCHES MINIMUM AND 0.923 INCHES MAXIMUM IN. 14 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.