PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

533T1-1M-150Valve,safety Relief

Circor Aerospace, Inc. Dba Circor Aerospace Inc · NSN 4820-01-322-7578 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-322-7578 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-322-7578. Primary manufacturer part number: 533T1-1M-150.
Features
  • Valve,safety Relief — FSC 4820
  • Material: STEEL COMP 316 BODY
  • Thread Series Designator: NPT ALL ENDS
  • Style Designator: STRAIGHT THRU
  • Media for Which Designed: HYDROGEN THIRD RESPONSE
  • Nominal Thread Size: 0.125 INCHES ALL ENDS IN
  • Connection Type: THREADED EXTERNAL PIPE ALL ENDS
  • Valve Operation Method: AUTOMATIC
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Comp 316 Body construction
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-322-7578, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Circor Aerospace, Inc. Dba Circor Aerospace Inc. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 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
NSN4820-01-322-7578
Primary Part Number533T1-1M-150
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerCircor Aerospace, Inc. Dba Circor Aerospace Inc
StatusACTIVE
MaterialSTEEL COMP 316 BODY
Thread Series DesignatorNPT ALL ENDS
Style DesignatorSTRAIGHT THRU
Media for Which DesignedHYDROGEN THIRD RESPONSE
Nominal Thread Size0.125 INCHES ALL ENDS IN
Connection TypeTHREADED EXTERNAL PIPE ALL ENDS
Valve Operation MethodAUTOMATIC
Maximum Operating Temp300.0 FAHRENHEIT SINGLE RESPONSE DEGF
Operating Pressure600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Connection StylePLAIN (PIPE) ALL ENDS
Adjustable Pressure Range+150.0 TO 175.0 POUNDS PER SQUARE INCH LBS
Media for Which DesignedAIR FIRST RESPONSE
Flow Control DevicePOPPET
Thread DirectionRIGHT-HAND ALL ENDS
Media for Which DesignedHELIUM SECOND RESPONSE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5905-00-138-4239KC11-01X4/9567 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Sensor Systems, L.l.c. Dba Sensor Systems Llc
3110-00-156-4878177009-48 INTERCHANGEABLE
Bearing,ball,annular
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5985-00-486-625120-2773 INTERCHANGEABLE
Coupler,rotary,radio Frequency
Microwave Development Laboratories, Inc. Dba Microwave Development Laboratories Inc
5930-00-489-01491339AS895-1 INTERCHANGEABLE
Switch,toggle
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
5950-00-679-8892 INTERCHANGEABLE
Reactor
2520-01-048-70955406 INTERCHANGEABLE
Torque Converter,vehicular
Barney & White Auto Parts Inc
5306-01-054-45655409 INTERCHANGEABLE
Bolt,eye
Hutchinson Aerospace & Industry, Inc. Dba Vlier Div Vlier
5962-01-095-3613 INTERCHANGEABLE
Microcircuit,digital
6640-01-110-93685409 INTERCHANGEABLE
Filtration System
Grace W R and Co Amicon Div
4720-01-122-77315409 INTERCHANGEABLE
Hose Assembly,metallic
Transdigm Inc Div Adelwiggins Group
Cross-Reference Index
Part NumberManufacturer
5409 Howell Laboratories Inc Dba Howell Laboratories Inc (USA)
533T1-1M-150 PRIMARY Circor Aerospace, Inc. Dba Circor Aerospace Inc (USA)
Related Parts
5905-00-138-4239INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
KC11-01X4/9567
3110-00-156-4878INTERCHANGEABLE
BEARING,BALL,ANNULAR
177009-48
5985-00-486-6251INTERCHANGEABLE
COUPLER,ROTARY,RADIO FREQUENCY
20-2773
5930-00-489-0149INTERCHANGEABLE
SWITCH,TOGGLE
1339AS895-1
5950-00-679-8892INTERCHANGEABLE
REACTOR
2520-01-048-7095INTERCHANGEABLE
TORQUE CONVERTER,VEHICULAR
5406
5306-01-054-4565INTERCHANGEABLE
BOLT,EYE
5409
5962-01-095-3613INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
6640-01-110-9368INTERCHANGEABLE
FILTRATION SYSTEM
5409
4720-01-122-7731INTERCHANGEABLE
HOSE ASSEMBLY,METALLIC
5409
5330-01-137-7274INTERCHANGEABLE
GASKET
S5-409
5120-01-428-4949INTERCHANGEABLE
SCREWDRIVER ATTACHMENT,SOCKET WR
J5409A

Frequently Asked Questions

What is NSN 4820-01-322-7578?

NSN 4820-01-322-7578 is a Valve,safety Relief, manufactured by Circor Aerospace, Inc. Dba Circor Aerospace Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-322-7578?

NSN 4820-01-322-7578 has 2 cross-referenced part numbers: 5409 (Howell Laboratories Inc Dba Howell Laboratories Inc), 533T1-1M-150 (Circor Aerospace, Inc. Dba Circor Aerospace Inc).

What NSN replaces 4820-01-322-7578?

There are 12 known substitutes for 4820-01-322-7578: 5905-00-138-4239, 3110-00-156-4878, 5985-00-486-6251 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 533T1-1M-150?

Key specifications for 533T1-1M-150: Material: STEEL COMP 316 BODY; Thread Series Designator: NPT ALL ENDS; Style Designator: STRAIGHT THRU; Media for Which Designed: HYDROGEN THIRD RESPONSE. 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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