PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2AH15-646Valve,safety Relief

Westinghouse Air Brake Technologies Corp Dba Westinghouse Air Brake Technologies Corp · NSN 4820-00-710-9115 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-710-9115 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-710-9115. Primary manufacturer part number: 2AH15-646.
Features
  • Valve,safety Relief — FSC 4820
  • Style Designator: STRAIGHT THRU
  • Nominal Thread Size: 0.250 INCHES FIRST END IN
  • Thread Direction: RIGHT-HAND FIRST END
  • Bonnet Attachment Method: THREADED
  • Thread Series Designator: NPT FIRST END
  • Bonnet Type: INSIDE SCREW
  • Valve Operation Method: AUTOMATIC
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-00-710-9115, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Westinghouse Air Brake Technologies Corp Dba Westinghouse Air Brake Technologies Corp. Government technical data includes 11 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-00-710-9115
Primary Part Number2AH15-646
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerWestinghouse Air Brake Technologies Corp Dba Westinghouse Air Brake Technologies Corp
StatusCANCELLED
Style DesignatorSTRAIGHT THRU
Nominal Thread Size0.250 INCHES FIRST END IN
Thread DirectionRIGHT-HAND FIRST END
Bonnet Attachment MethodTHREADED
Thread Series DesignatorNPT FIRST END
Bonnet TypeINSIDE SCREW
Valve Operation MethodAUTOMATIC
Connection StylePLAIN (PIPE) FIRST END
Connection TypeTHREADED EXTERNAL PIPE FIRST END
Flow Control DeviceSTEM
Disk Loading MethodSPRING
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 3
4820-00-203-7575112CSS-2-070 INTERCHANGEABLE
Valve,safety Relief
F.c.kingston Co. Dba Storm Manufacturing
6610-00-875-3069535965 INTERCHANGEABLE
Gearshaft,transduce
Honeywell International, Inc Div Aerospace-Tucson
5915-01-216-5509 INTERCHANGEABLE
Filter,saw
Cross-Reference Index
Part NumberManufacturer
535965 Westinghouse Air Brake Technologies Corp Dba Westinghouse Air Brake Technologies Corp (USA)
2AH15-646 PRIMARY Westinghouse Air Brake Technologies Corp Dba Westinghouse Air Brake Technologies Corp (USA)
2AH15-646 Dresser Industries Inc Leroi Div (USA)
850980 PRIMARY Westinghouse Air Brake Technologies Corp Dba Westinghouse Air Brake Technologies Corp (USA)
Related Parts
4820-00-203-7575INTERCHANGEABLE
VALVE,SAFETY RELIEF
112CSS-2-070
6610-00-875-3069INTERCHANGEABLE
GEARSHAFT,TRANSDUCE
535965
5915-01-216-5509INTERCHANGEABLE
FILTER,SAW

Frequently Asked Questions

What is NSN 4820-00-710-9115?

NSN 4820-00-710-9115 is a Valve,safety Relief, manufactured by Westinghouse Air Brake Technologies Corp Dba Westinghouse Air Brake Technologies Corp, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-710-9115?

NSN 4820-00-710-9115 has 4 cross-referenced part numbers: 535965 (Westinghouse Air Brake Technologies Corp Dba Westinghouse Air Brake Technologies Corp), 2AH15-646 (Westinghouse Air Brake Technologies Corp Dba Westinghouse Air Brake Technologies Corp), 2AH15-646 (Dresser Industries Inc Leroi Div), 850980 (Westinghouse Air Brake Technologies Corp Dba Westinghouse Air Brake Technologies Corp).

What NSN replaces 4820-00-710-9115?

There are 3 known substitutes for 4820-00-710-9115: 4820-00-203-7575, 6610-00-875-3069, 5915-01-216-5509. Verify interchangeability with system specifications before substitution.

What are the specifications of 2AH15-646?

Key specifications for 2AH15-646: Style Designator: STRAIGHT THRU; Nominal Thread Size: 0.250 INCHES FIRST END IN; Thread Direction: RIGHT-HAND FIRST END; Bonnet Attachment Method: THREADED. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-710-9115 still in active supply?

NSN 4820-00-710-9115 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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