The Poppet,relief Valve, cataloged under National Stock Number 4820-01-122-7883, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-122-7883 |
| Primary Part Number | 2493770 |
| Item Name | Poppet,relief Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| Status | ACTIVE |
| General Characteristics Item Description | 0.800 IN. 0/A LG,0.600 IN. 0D,0.527 IN. ID,GASK-0-SEAL,B0DY ALUMINUM ALL0Y AMS 4117,AN0DIC FINISH PER MIL-A-8625 TYPE 2 IN |
| 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 |
|---|---|
| 2493770 | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| Reference | Meaning |
|---|---|
| 10159627 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 2493770 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-122-7883 is a Poppet,relief Valve, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-122-7883 has 1 manufacturer part number on file: 2493770 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
Key specifications for 2493770: General Characteristics Item Description: 0.800 IN. 0/A LG,0.600 IN. 0D,0.527 IN. ID,GASK-0-SEAL,B0DY ALUMINUM ALL0Y AMS 4117,AN0DIC FINISH PER MIL-A-8625 TYPE 2 IN. 1 specification is 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.