The Valve,safety Relief, cataloged under National Stock Number 4820-00-824-9740, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Us Army Aviation and Missile Command. Government technical data includes 21 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. 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 | 4820-00-824-9740 |
| Primary Part Number | 9199041 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Renewable Seat Ring Type | RETAINING SCREW |
| Nominal Pipe Size Accommodated | 0.250 INCHES FIRST END IN |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | QQ-B-626,COMP 11,1/2H FED SPEC SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | QQ-B-626,COMP AA,1/2H FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 7.0 POUNDS PER SQUARE INCH (PSI) NOMINAL POWER DRIVE LBS |
| Features Provided | VALVE STEM LOCK SHIELD |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.250 INCHES FIRST END IN |
| Disk Loading Method | SPRING |
| Test Data Document | 18876-9199041 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING) |
| Thread Quantity Per Inch | 18 FIRST END |
| Material | RUBBER SYNTHETIC SEAT |
| Material | COPPER ALLOY 262 OR COPPER ALLOY 331 OR COPPER ALLOY 344 BODY |
| Material | COPPER ALLOY 262 OR COPPER ALLOY 331 OR COPPER ALLOY 344 STEM |
| Thread Series Designator | NPT FIRST END |
| Opening Pressure Setting | 7.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4820-00-824-9740 is a Valve,safety Relief, manufactured by Us Army Aviation and Missile Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-824-9740 has 2 manufacturer part numbers on file: C-13-A (Us Army Aviation and Missile Command), 9199041 (Us Army Aviation and Missile Command).
1 possible match (shared part number, not a government interchangeability claim): 5945-00-987-4562. Verify interchangeability with system specifications before substitution.
Key specifications for 9199041: Flow Control Device: POPPET; Renewable Seat Ring Type: RETAINING SCREW; Nominal Pipe Size Accommodated: 0.250 INCHES FIRST END IN; Connection Style: PLAIN (PIPE) FIRST END. 21 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.