The Valve,safety Relief, cataloged under National Stock Number 4820-00-262-1081, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Emerson Automation Solutions Final Control Us Lp Div Navy Product Team. Government technical data includes 24 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-262-1081 |
| Primary Part Number | 20213KS41M |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Renewable Seat Ring Type | THREADED |
| Connection Style | STREAMLINED WITH TWO BRAZING RINGS (TUBE) ALL ENDS |
| Connection Type | UNTHREADED INTERNAL TUBE ALL ENDS |
| Style Designator | ANGLE |
| Material Document and Classification | QQ-C-390,ALLOYD4/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTMA276 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | ASTMA276 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES ALL ENDS IN |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +66.0 TO 75.0 POUNDS PER SQUARE INCH LBS |
| Features Provided | BONNET PACKING AND PRESSURE TIGHT OUTLET SIDE |
| Bonnet Type | INSIDE SPRING |
| Maximum Operating Temp | 150.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nondefinitive Spec/std Data | B GRADE |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | THREADED |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| Test Data Document | 81349-MIL-S-901 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Material | STEEL SEAT |
| Material | STEEL FLOW CONTROL DEVICE |
| Material | COPPER ALLOY 922 BODY |
| Valve Discharge Flow Rate | 22.0 GALLONS PER MINUTE |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 20213KS41M PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| Reference | Meaning |
|---|---|
| MILV24332 | 5/9 Secondary reference U.S. Government activity |
| MILV24332GRB1/2 400-66T075SBU | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 20213KS41M/20213/883116375 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| CS4820-0034 | 5/9 Secondary reference Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) |
| 20213KS41MCID883116375 | 5/9 Secondary reference Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| MIL-DTL-24332 | 4/1 Identification reference U.S. Government activity |
| 20213KS41M/20213/883116375 | 5/9 Secondary reference Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| 20213KS41MCID883116375 | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
NSN 4820-00-262-1081 is a Valve,safety Relief, manufactured by Emerson Automation Solutions Final Control Us Lp Div Navy Product Team, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-262-1081 has 1 manufacturer part number on file: 20213KS41M (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
Key specifications for 20213KS41M: Flow Control Device: DISK; Renewable Seat Ring Type: THREADED; Connection Style: STREAMLINED WITH TWO BRAZING RINGS (TUBE) ALL ENDS; Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS. 24 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.