PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20212-1HM41MValve,safety Relief

Emerson Automation Solutions Final Control Us Lp Div Navy Product Team · NSN 4820-01-097-8290 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-097-8290 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-097-8290. Primary manufacturer part number: 20212-1HM41M.
Features
  • Valve,safety Relief — FSC 4820
  • Material: COPPER ALLOY BODY
  • Material: NICKEL ALLOY STEM
  • Material Document and Classification: QQ-C-390,ALLOY D4/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY
  • Maximum Operating Temp: 150.0 FAHRENHEIT SINGLE RESPONSE DEGF
  • Connection Style: STREAMLINED WITH ONE BRAZING RING (TUBE) ALL ENDS
  • Material: NICKEL ALLOY FLOW CONTROL DEVICE
  • Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Body construction
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-097-8290, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Emerson Automation Solutions Final Control Us Lp Div Navy Product Team. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-097-8290
Primary Part Number20212-1HM41M
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerEmerson Automation Solutions Final Control Us Lp Div Navy Product Team
StatusACTIVE
MaterialCOPPER ALLOY BODY
MaterialNICKEL ALLOY STEM
Material Document and ClassificationQQ-C-390,ALLOY D4/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY
Maximum Operating Temp150.0 FAHRENHEIT SINGLE RESPONSE DEGF
Connection StyleSTREAMLINED WITH ONE BRAZING RING (TUBE) ALL ENDS
MaterialNICKEL ALLOY FLOW CONTROL DEVICE
Connection TypeUNTHREADED INTERNAL TUBE ALL ENDS
Material Document and ClassificationASTM B164-61 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE
MaterialCOPPER ALLOY SEAT
Flow Control DeviceDISK
Material Document and ClassificationQQ-N-288,COMP A FED SPEC SINGLE MATERIAL RESPONSE SEAT
Adjustable Pressure Range+45.0 TO 55.0 POUNDS PER SQUARE INCH LBS
Valve Operation MethodAUTOMATIC
Media for Which DesignedWATER-OIL-GAS SINGLE RESPONSE
Style DesignatorANGLE
Nominal Outside Diameter Tube Accommodated1.500 INCHES ALL ENDS IN
Renewable Seat Ring TypePRESSED-IN
Operating Pressure400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Material Document and ClassificationASTM B164-61 ASSN STD SINGLE MATERIAL RESPONSE STEM
Disk Loading MethodSPRING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5905-00-119-8812 INTERCHANGEABLE
Resistor,fixed,composition
3110-00-554-58381B4101 INTERCHANGEABLE
Bearing,ball,annular
Caterpillar Inc Div Caterpillar Defense
4820-01-098-162520212-1-LM41M INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-152-770120212-1JM41M INTERCHANGEABLE
Valve,safety Relief
Anderson Greenwood Lp Dba Anderson Greenwood Crosby
5310-01-396-8158202121 INTERCHANGEABLE
Washer,flat
Dometic Marine Canada Inc.
5820-01-433-5717202.121 INTERCHANGEABLE
Modification Kit,radio Equipment
Naval Electronics, Inc
6515-01-470-8516202121 INTERCHANGEABLE
Tip,ear,tympanometer
Biologic Systems Corp
Cross-Reference Index
Part NumberManufacturer
20212-1HM41M Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
20212-1HM41M PRIMARY Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA)
20212-1 Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
20212-1 PRIMARY Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA)
Related Parts
5905-00-119-8812INTERCHANGEABLE
RESISTOR,FIXED,COMPOSITION
3110-00-554-5838INTERCHANGEABLE
BEARING,BALL,ANNULAR
1B4101
4820-01-098-1625INTERCHANGEABLE
VALVE,SAFETY RELIEF
20212-1-LM41M
4820-01-152-7701INTERCHANGEABLE
VALVE,SAFETY RELIEF
20212-1JM41M
5310-01-396-8158INTERCHANGEABLE
WASHER,FLAT
202121
5820-01-433-5717INTERCHANGEABLE
MODIFICATION KIT,RADIO EQUIPMENT
202.121
6515-01-470-8516INTERCHANGEABLE
TIP,EAR,TYMPANOMETER
202121

Frequently Asked Questions

What is NSN 4820-01-097-8290?

NSN 4820-01-097-8290 is a Valve,safety Relief, manufactured by Emerson Automation Solutions Final Control Us Lp Div Navy Product Team, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-097-8290?

NSN 4820-01-097-8290 has 4 cross-referenced part numbers: 20212-1HM41M (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20212-1HM41M (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 20212-1 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20212-1 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).

What NSN replaces 4820-01-097-8290?

There are 7 known substitutes for 4820-01-097-8290: 5905-00-119-8812, 3110-00-554-5838, 4820-01-098-1625 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20212-1HM41M?

Key specifications for 20212-1HM41M: Material: COPPER ALLOY BODY; Material: NICKEL ALLOY STEM; Material Document and Classification: QQ-C-390,ALLOY D4/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY; Maximum Operating Temp: 150.0 FAHRENHEIT SINGLE RESPONSE DEGF. 21 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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