The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-418-3217, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | The Boeing Company (CAGE 77272); Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S (CAGE 73760) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-418-3217 |
| Primary Part Number | AV17B1277B-6 |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S |
| Status | ACTIVE |
| 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 |
|---|---|
| 901-366-596-105 | The Boeing Company (USA) |
| AV17B1277B-6 | Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S (USA) |
| Reference | Meaning |
|---|---|
| AV117B1277B5 | 5/9 Secondary reference Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp |
| AV117B1277B5 | 5/9 Secondary reference Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S |
| AV17B1277B-6 | 5/3 Secondary reference U.S. Government activity |
NSN 4820-01-418-3217 is a Valve,relief,pressure and Temper, manufactured by Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-418-3217 has 2 manufacturer part numbers on file: 901-366-596-105 (The Boeing Company), AV17B1277B-6 (Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S).
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.