PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20274 ITEM 20274E51MValve,safety Relief

Emerson Automation Solutions Final Control Us Lp Div Navy Product Team · NSN 4820-01-318-2835 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-318-2835 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-318-2835. Primary manufacturer part number: 20274 ITEM 20274E51M.
Features
  • Valve,safety Relief — FSC 4820
  • Nominal Outside Diameter Tube Accommodated: 0.500 INCHES ALL ENDS IN
  • Disk Loading Method: SPRING
  • Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS
  • Material: COPPER ALLOY BODY
  • Valve Operation Method: AUTOMATIC
  • Adjustable Pressure Range: +25.0 TO 29.0 POUNDS PER SQUARE INCH LBS
  • Style Designator: ANGLE
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 4820-01-318-2835, 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 10 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
NSN4820-01-318-2835
Primary Part Number20274 ITEM 20274E51M
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerEmerson Automation Solutions Final Control Us Lp Div Navy Product Team
StatusACTIVE
Nominal Outside Diameter Tube Accommodated0.500 INCHES ALL ENDS IN
Disk Loading MethodSPRING
Connection TypeUNTHREADED INTERNAL TUBE ALL ENDS
MaterialCOPPER ALLOY BODY
Valve Operation MethodAUTOMATIC
Adjustable Pressure Range+25.0 TO 29.0 POUNDS PER SQUARE INCH LBS
Style DesignatorANGLE
Flow Control DeviceDISK
Connection StyleREDUCED SOCKET ONE BRAZING RING (TUBE) ALL ENDS
MaterialNICKEL ALLOY STEM
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
4820-01-215-146520274P51M INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-217-8599 INTERCHANGEABLE
Valve,safety Relief
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
20274 ITEM 20274E51M Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
20274 Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
20274 ITEM 20274E51M PRIMARY Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (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
4820-01-215-1465INTERCHANGEABLE
VALVE,SAFETY RELIEF
20274P51M
4820-01-217-8599INTERCHANGEABLE
VALVE,SAFETY RELIEF
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 4820-01-318-2835?

NSN 4820-01-318-2835 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 4820-01-318-2835?

NSN 4820-01-318-2835 has 3 cross-referenced part numbers: 20274 ITEM 20274E51M (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20274 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20274 ITEM 20274E51M (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).

What NSN replaces 4820-01-318-2835?

There are 12 known substitutes for 4820-01-318-2835: 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 20274 ITEM 20274E51M?

Key specifications for 20274 ITEM 20274E51M: Nominal Outside Diameter Tube Accommodated: 0.500 INCHES ALL ENDS IN; Disk Loading Method: SPRING; Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS; Material: COPPER ALLOY BODY. 10 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com