PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2020600Y51M(SPCLN)Valve,safety Relief

Anderson Greenwood Lp Dba Anderson Greenwood Crosby · NSN 4820-01-174-1158 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-174-1158 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-174-1158. Primary manufacturer part number: 2020600Y51M(SPCLN).
Features
  • Valve,safety Relief — FSC 4820
  • Nominal Pipe Size Accommodated: 1.000 INCHES FIRST END IN
  • Adjustable Pressure Range: +401.0 TO 500.0 POUNDS PER SQUARE INCH LBS
  • Criticality Code Justification: ZZZY
  • Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
  • 3 verified cross-references
  • Primary manufacturer: Anderson Greenwood Lp Dba Anderson Greenwood Crosby
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-174-1158, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Anderson Greenwood Lp Dba Anderson Greenwood Crosby. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, 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
NSN4820-01-174-1158
Primary Part Number2020600Y51M(SPCLN)
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAnderson Greenwood Lp Dba Anderson Greenwood Crosby
StatusACTIVE
Nominal Pipe Size Accommodated1.000 INCHES FIRST END IN
Adjustable Pressure Range+401.0 TO 500.0 POUNDS PER SQUARE INCH LBS
Criticality Code JustificationZZZY
Reference Number Differentiating CharacteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4810-00-168-8723 INTERCHANGEABLE
Seat,valve
4720-00-440-207220206 INTERCHANGEABLE
Hose,preformed
Gates Corporation
3110-00-554-5839 INTERCHANGEABLE
Bearing,ball,annular
1650-00-923-6317381M0183P001 INTERCHANGEABLE
Cylinder Assembly,actuating,line
Raytheon Company Dba Raytheon Co
5950-00-967-209220206 INTERCHANGEABLE
Transformer,power
Drs Signal Solutions, Inc.
6760-01-073-32282020-6 INTERCHANGEABLE
Adapter Unit,densi
Gamma Scientific Inc
5961-01-166-3159 INTERCHANGEABLE
Semiconductor Device,diode
6515-01-237-8469202.06 INTERCHANGEABLE
Screw,bone
Depuy Synthes Sales Inc Dba Depuy Synthes Trauma Div Depuy Synthes Sales, Inc., D/b/a Depuy Synthes Trauma
5310-01-270-5463 INTERCHANGEABLE
Nut,plain,single Ball Seat,hexag
5120-01-430-8241 INTERCHANGEABLE
Wrench,box and Open End,combinat
Cross-Reference Index
Part NumberManufacturer
2020600Y51M(SPCLN) Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
20206Y51M(SPCLN) Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
20206 Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
Related Parts
4810-00-168-8723INTERCHANGEABLE
SEAT,VALVE
4720-00-440-2072INTERCHANGEABLE
HOSE,PREFORMED
20206
3110-00-554-5839INTERCHANGEABLE
BEARING,BALL,ANNULAR
1650-00-923-6317INTERCHANGEABLE
CYLINDER ASSEMBLY,ACTUATING,LINE
381M0183P001
5950-00-967-2092INTERCHANGEABLE
TRANSFORMER,POWER
20206
6760-01-073-3228INTERCHANGEABLE
ADAPTER UNIT,DENSI
2020-6
5961-01-166-3159INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
6515-01-237-8469INTERCHANGEABLE
SCREW,BONE
202.06
5310-01-270-5463INTERCHANGEABLE
NUT,PLAIN,SINGLE BALL SEAT,HEXAG
5120-01-430-8241INTERCHANGEABLE
WRENCH,BOX AND OPEN END,COMBINAT
4820-01-494-4920INTERCHANGEABLE
VALVE,SAFETY RELIEF
20206K51M
4820-01-495-5307INTERCHANGEABLE
VALVE,SAFETY RELIEF
20206L51M

Frequently Asked Questions

What is NSN 4820-01-174-1158?

NSN 4820-01-174-1158 is a Valve,safety Relief, manufactured by Anderson Greenwood Lp Dba Anderson Greenwood Crosby, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-174-1158?

NSN 4820-01-174-1158 has 3 cross-referenced part numbers: 2020600Y51M(SPCLN) (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20206Y51M(SPCLN) (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20206 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).

What NSN replaces 4820-01-174-1158?

There are 12 known substitutes for 4820-01-174-1158: 4810-00-168-8723, 4720-00-440-2072, 3110-00-554-5839 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2020600Y51M(SPCLN)?

Key specifications for 2020600Y51M(SPCLN): Nominal Pipe Size Accommodated: 1.000 INCHES FIRST END IN; Adjustable Pressure Range: +401.0 TO 500.0 POUNDS PER SQUARE INCH LBS; Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS. 4 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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