The Seat,valve, cataloged under National Stock Number 4820-01-085-7071, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-085-7071 |
| Primary Part Number | MC12944 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.101 INCHES MINIMUM AND 0.108 INCHES MAXIMUM IN |
| Flange Diameter | 0.550 INCHES MINIMUM AND 0.580 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MC+5 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Body Outside Diameter | 0.357 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN |
| Hardness Rating | 82.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.111 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN |
| Seat Radius | 0.188 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Under Flange Height | 0.418 INCHES MINIMUM AND 0.422 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| MC12944 PRIMARY | Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace (USA) |
NSN 4820-01-085-7071 is a Seat,valve, manufactured by Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-085-7071 has 1 manufacturer part number on file: MC12944 (Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace).
Key specifications for MC12944: Flange Seat to Disk End Height: 0.101 INCHES MINIMUM AND 0.108 INCHES MAXIMUM IN; Flange Diameter: 0.550 INCHES MINIMUM AND 0.580 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MC+5 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Body Outside Diameter: 0.357 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN. 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.