The Valve,safety Relief, cataloged under National Stock Number 4820-01-114-7543, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-114-7543 |
| Primary Part Number | 279505 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems |
| Status | ACTIVE |
| Flow Control Device | NEEDLE |
| Surface Treatment Document and Classification | TT-C-490 FED SPEC 1ST TREATMENT RESPONSE AND TT-P-636 FED STD 1ST TREATMENT RESPONSE AND TT-E-529,COLOR 24087 MIL SPEC 1ST TREATMENT RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Connection Style | PLAIN,OPTIONAL END(PIPE) ALL ENDS |
| Criticality Code Justification | FEAT |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | ANGLE |
| Bonnet Type | INSIDE SPRING |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Disk Loading Method | SPRING |
| Mounting Facility | BRACKET(S) |
| Bonnet Attachment Method | INTEGRAL |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Thread Series Designator | ANPT ALL ENDS |
| Valve Operation Method | AIR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 279505 PRIMARY | Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems (USA) |
| 11669104 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 279505N | 5/1 Secondary reference Cross Truck Equipment Company, Inc. |
| 279505N | 5/1 Secondary reference Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems |
| 279505N | 5/1 Secondary reference Rim and Wheel Service, Inc. |
| KN31000 | 5/9 Secondary reference Haldex Brake Products Corporation |
NSN 4820-01-114-7543 is a Valve,safety Relief, manufactured by Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-114-7543 has 2 manufacturer part numbers on file: 279505 (Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems), 11669104 (U S Army Tank Automotive Command Amsta-Im-Mm).
1 possible match (shared part number, not a government interchangeability claim): 6640-01-170-7507. Verify interchangeability with system specifications before substitution.
Key specifications for 279505: Flow Control Device: NEEDLE; Surface Treatment Document and Classification: TT-C-490 FED SPEC 1ST TREATMENT RESPONSE AND TT-P-636 FED STD 1ST TREATMENT RESPONSE AND TT-E-529,COLOR 24087 MIL SPEC 1ST TREATMENT RESPONSE LOCATION NOT OTHERWISE SPECIFIED; Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS; Criticality Code Justification: FEAT. 15 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.