The Seat,valve, cataloged under National Stock Number 4820-01-081-7872, 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 | 4820-01-081-7872 |
| Primary Part Number | MC12548 |
| 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 | 0.690 INCHES NOMINAL IN |
| Flange Diameter | 0.630 INCHES MINIMUM AND 0.632 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Outside Diameter | 0.530 INCHES NOMINAL IN |
| Body Stepped Inside Diameter | 0.190 INCHES NOMINAL SECOND STEP IN |
| Body Stepped Inside Diameter | 0.313 INCHES NOMINAL FIRST STEP IN |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | QQ-A-225,TYPE2024-T351 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Surface Treatment | ANODIZE OVERALL |
| Under Flange Height | 0.255 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Seat Angle in Deg | 90.000 NOMINAL |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| MC12548 PRIMARY | Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace (USA) |
NSN 4820-01-081-7872 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 4820-01-081-7872 has 1 manufacturer part number on file: MC12548 (Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace).
Key specifications for MC12548: Flange Seat to Disk End Height: 0.690 INCHES NOMINAL IN; Flange Diameter: 0.630 INCHES MINIMUM AND 0.632 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-A-8625,TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Body Outside Diameter: 0.530 INCHES NOMINAL 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.