PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20274P51MValve,safety Relief

Emerson Automation Solutions Final Control Us Lp Div Navy Product Team · NSN 4820-01-215-1465 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-215-1465 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-215-1465. Primary manufacturer part number: 20274P51M.
Features
  • Valve,safety Relief — FSC 4820
  • Flow Control Device: DISK
  • Adjustable Pressure Range: +121.0 TO 135.0 POUNDS PER SQUARE INCH LBS
  • Nominal Outside Diameter Tube Accommodated: 0.500 INCHES ALL ENDS IN
  • Operating Pressure: 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Valve Operation Method: AUTOMATIC
  • Style Designator: ANGLE
  • Connection Style: SOCKET WITH BRAZING RING (TUBE) ALL ENDS
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy 922 Body construction
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-215-1465, 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 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-215-1465
Primary Part Number20274P51M
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerEmerson Automation Solutions Final Control Us Lp Div Navy Product Team
StatusACTIVE
Flow Control DeviceDISK
Adjustable Pressure Range+121.0 TO 135.0 POUNDS PER SQUARE INCH LBS
Nominal Outside Diameter Tube Accommodated0.500 INCHES ALL ENDS IN
Operating Pressure400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Valve Operation MethodAUTOMATIC
Style DesignatorANGLE
Connection StyleSOCKET WITH BRAZING RING (TUBE) ALL ENDS
Connection TypeUNTHREADED INTERNAL TUBE ALL ENDS
MaterialCOPPER ALLOY 922 BODY
Maximum Operating Temp250.0 FAHRENHEIT SINGLE RESPONSE DEGF
MaterialNICKEL ALLOY FLOW CONTROL DEVICE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5940-00-502-294910-301-4 INTERCHANGEABLE
Terminal,stud
Concord Electronics, Inc.
3110-00-554-3197 INTERCHANGEABLE
Bearing,ball,annular
6685-00-810-6047AW1821AC02 INTERCHANGEABLE
Gage,differential,dial Indicatin
Ametek, Inc. Div Aerospace & Defense
4820-01-052-24492027401S0030 INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-052-24502027401S0181 INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
5962-01-170-2339CD4028BF INTERCHANGEABLE
Microcircuit,digital
Renesas Electronics America Inc
4820-01-193-7669 INTERCHANGEABLE
Valve,angle
4820-01-217-8599 INTERCHANGEABLE
Valve,safety Relief
4820-01-318-283520274 ITEM 20274E51M INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-373-640620274G51M INTERCHANGEABLE
Valve,relief,pressure and Temper
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Cross-Reference Index
Part NumberManufacturer
20274P51M PRIMARY Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA)
20274 Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
20274P51M Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
Related Parts
5940-00-502-2949INTERCHANGEABLE
TERMINAL,STUD
10-301-4
3110-00-554-3197INTERCHANGEABLE
BEARING,BALL,ANNULAR
6685-00-810-6047INTERCHANGEABLE
GAGE,DIFFERENTIAL,DIAL INDICATIN
AW1821AC02
4820-01-052-2449INTERCHANGEABLE
VALVE,SAFETY RELIEF
2027401S0030
4820-01-052-2450INTERCHANGEABLE
VALVE,SAFETY RELIEF
2027401S0181
5962-01-170-2339INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
CD4028BF
4820-01-193-7669INTERCHANGEABLE
VALVE,ANGLE
4820-01-217-8599INTERCHANGEABLE
VALVE,SAFETY RELIEF
4820-01-318-2835INTERCHANGEABLE
VALVE,SAFETY RELIEF
20274 ITEM 20274E51M
4820-01-373-6406INTERCHANGEABLE
VALVE,RELIEF,PRESSURE AND TEMPER
20274G51M
4820-01-428-9878INTERCHANGEABLE
VALVE,SAFETY RELIEF
20274J51M(OXCLEA
6680-01-539-9238INTERCHANGEABLE
GLASS,LIQUID SIGHT INDICATOR,ROU
20274

Frequently Asked Questions

What is NSN 4820-01-215-1465?

NSN 4820-01-215-1465 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 4820-01-215-1465?

NSN 4820-01-215-1465 has 3 cross-referenced part numbers: 20274P51M (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 20274 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20274P51M (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).

What NSN replaces 4820-01-215-1465?

There are 12 known substitutes for 4820-01-215-1465: 5940-00-502-2949, 3110-00-554-3197, 6685-00-810-6047 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20274P51M?

Key specifications for 20274P51M: Flow Control Device: DISK; Adjustable Pressure Range: +121.0 TO 135.0 POUNDS PER SQUARE INCH LBS; Nominal Outside Diameter Tube Accommodated: 0.500 INCHES ALL ENDS IN; Operating Pressure: 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 11 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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