PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

25215Valve,safety Relief

Unimasco Inc · NSN 4820-00-847-5236 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-847-5236 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-847-5236. Primary manufacturer part number: 25215.
Features
  • Valve,safety Relief — FSC 4820
  • Thread Series Designator: NPT FIRST END
  • Disk Loading Method: SPRING
  • Flow Control Device: BALL
  • Material: STEEL CORROSION RESISTING FLOW CONTROL DEVICE
  • Valve Operation Method: AUTOMATIC
  • Thread Direction: RIGHT-HAND FIRST END
  • Nominal Thread Size: 0.125 INCHES FIRST END IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting Flow Control Device construction
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-00-847-5236, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Unimasco Inc. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-847-5236
Primary Part Number25215
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerUnimasco Inc
StatusACTIVE
Thread Series DesignatorNPT FIRST END
Disk Loading MethodSPRING
Flow Control DeviceBALL
MaterialSTEEL CORROSION RESISTING FLOW CONTROL DEVICE
Valve Operation MethodAUTOMATIC
Thread DirectionRIGHT-HAND FIRST END
Nominal Thread Size0.125 INCHES FIRST END IN
MaterialCOPPER ALLOY BODY
Connection StylePLAIN (PIPE) FIRST END
Connection TypeTHREADED EXTERNAL PIPE FIRST END
Style DesignatorANGLE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5133-00-228-13862511 1-39/64 INTERCHANGEABLE
Drill,twist
New York Twist Drill Inc
5360-00-303-118316571-21-1 INTERCHANGEABLE
Spring,helical,compression
Ward Leonard Ct Llc
5345-01-053-029525215 INTERCHANGEABLE
Belt,abrasive
Meritor Heavy Vehicle Systems, Llc
3455-01-179-366550-10349 INTERCHANGEABLE
Reamer,machine
Union Butterfield Corp P O Box 9000 Crystal Lake Il 60039
3010-01-317-541831417 INTERCHANGEABLE
Coupling,shaft,flexible
Rexnord Industries, Llc Div Couplings Division
4130-01-538-9029 INTERCHANGEABLE
Pedestal,pao Chille
Cross-Reference Index
Part NumberManufacturer
25215 PRIMARY Unimasco Inc (USA)
Related Parts
5133-00-228-1386INTERCHANGEABLE
DRILL,TWIST
2511 1-39/64
5360-00-303-1183INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
16571-21-1
5345-01-053-0295INTERCHANGEABLE
BELT,ABRASIVE
25215
3455-01-179-3665INTERCHANGEABLE
REAMER,MACHINE
50-10349
3010-01-317-5418INTERCHANGEABLE
COUPLING,SHAFT,FLEXIBLE
31417
4130-01-538-9029INTERCHANGEABLE
PEDESTAL,PAO CHILLE

Frequently Asked Questions

What is NSN 4820-00-847-5236?

NSN 4820-00-847-5236 is a Valve,safety Relief, manufactured by Unimasco Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-847-5236?

NSN 4820-00-847-5236 has 1 cross-referenced part number: 25215 (Unimasco Inc).

What NSN replaces 4820-00-847-5236?

There are 6 known substitutes for 4820-00-847-5236: 5133-00-228-1386, 5360-00-303-1183, 5345-01-053-0295 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 25215?

Key specifications for 25215: Thread Series Designator: NPT FIRST END; Disk Loading Method: SPRING; Flow Control Device: BALL; Material: STEEL CORROSION RESISTING FLOW CONTROL DEVICE. 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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