PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

415-8Valve,safety Relief

Watts Regulator Company · NSN 4820-01-324-8523 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-324-8523 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-324-8523. Primary manufacturer part number: 415-8.
Features
  • Valve,safety Relief — FSC 4820
  • Material: PLASTIC POLYTETRAFLUOROETHYLENE FLOW CONTROL DEVICE
  • Media for Which Designed: STEAM SINGLE RESPONSE
  • Thread Series Designator: NPT ALL ENDS
  • Opening Pressure Setting: 8.0 POUNDS PER SQUARE INCH LBS
  • Operating Pressure: 450.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Nominal Thread Size: 0.750 INCHES ALL ENDS IN
  • Bonnet Type: INSIDE SCREW
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Plastic Polytetrafluoroethylene Flow Control Device construction
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-324-8523, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Watts Regulator Company. Government technical data includes 15 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-324-8523
Primary Part Number415-8
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerWatts Regulator Company
StatusACTIVE
MaterialPLASTIC POLYTETRAFLUOROETHYLENE FLOW CONTROL DEVICE
Media for Which DesignedSTEAM SINGLE RESPONSE
Thread Series DesignatorNPT ALL ENDS
Opening Pressure Setting8.0 POUNDS PER SQUARE INCH LBS
Operating Pressure450.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Nominal Thread Size0.750 INCHES ALL ENDS IN
Bonnet TypeINSIDE SCREW
Thread DirectionRIGHT-HAND ALL ENDS
Flow Control DeviceDISK
Bonnet Attachment MethodTHREADED
Style DesignatorANGLE
MaterialBRONZE BODY
Valve Operation MethodAUTOMATIC
Connection StylePLAIN,OPTIONAL END(PIPE) ALL ENDS
Connection TypeTHREADED INTERNAL PIPE ALL ENDS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
6250-00-227-8241 INTERCHANGEABLE
Lampholder
5305-00-349-81884158 INTERCHANGEABLE
Screw,spring Brake
Wakmann Watch Company Inc
6150-00-707-32694158 INTERCHANGEABLE
Lead,electrical
Champion Aerospace Llc
6130-01-018-36734-158 INTERCHANGEABLE
Power Supply
Eldec Aerospace Corp
6150-01-087-08214296-2 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Honeywell International Inc. Dba Honeywell Div Aerospace -Olathe Hums Div
4730-01-127-0339 INTERCHANGEABLE
Nipple,pipe
5920-01-360-41184158 INTERCHANGEABLE
Fuse,enclosed Link
Micro Devices Corp Sub of Emerson Electric Co
5940-01-396-03091506-2ET INTERCHANGEABLE
Terminal,stud
Keystone Electronics Corp
Cross-Reference Index
Part NumberManufacturer
415-8 PRIMARY Watts Regulator Company (USA)
Related Parts
6250-00-227-8241INTERCHANGEABLE
LAMPHOLDER
5305-00-349-8188INTERCHANGEABLE
SCREW,SPRING BRAKE
4158
6150-00-707-3269INTERCHANGEABLE
LEAD,ELECTRICAL
4158
6130-01-018-3673INTERCHANGEABLE
POWER SUPPLY
4-158
6150-01-087-0821INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
4296-2
4730-01-127-0339INTERCHANGEABLE
NIPPLE,PIPE
5920-01-360-4118INTERCHANGEABLE
FUSE,ENCLOSED LINK
4158
5940-01-396-0309INTERCHANGEABLE
TERMINAL,STUD
1506-2ET

Frequently Asked Questions

What is NSN 4820-01-324-8523?

NSN 4820-01-324-8523 is a Valve,safety Relief, manufactured by Watts Regulator Company, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-324-8523?

NSN 4820-01-324-8523 has 1 cross-referenced part number: 415-8 (Watts Regulator Company).

What NSN replaces 4820-01-324-8523?

There are 8 known substitutes for 4820-01-324-8523: 6250-00-227-8241, 5305-00-349-8188, 6150-00-707-3269 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 415-8?

Key specifications for 415-8: Material: PLASTIC POLYTETRAFLUOROETHYLENE FLOW CONTROL DEVICE; Media for Which Designed: STEAM SINGLE RESPONSE; Thread Series Designator: NPT ALL ENDS; Opening Pressure Setting: 8.0 POUNDS PER SQUARE INCH LBS. 15 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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