PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

400-4-1Valve,air Venting,steam

Guardian Equipment Co Div of Water Saver Faucet Co · NSN 4520-01-369-8053 · FSC 4520 · No Item Name Available
Verified by PartsTable
NSN 4520-01-369-8053 — this item is cataloged by the U.S. Government under National Stock Number 4520-01-369-8053. Primary manufacturer part number: 400-4-1.
Features
  • Valve,air Venting,steam — FSC 4520
  • 1 verified cross-reference
  • Primary manufacturer: Guardian Equipment Co Div of Water Saver Faucet Co
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,air Venting,steam, cataloged under National Stock Number 4520-01-369-8053, is classified within Federal Supply Class 4520 (No Item Name Available) of the Plumbing, Heating, and Waste Disposal group. The primary manufacturer of record is Guardian Equipment Co Div of Water Saver Faucet Co. This item has 1 commercial cross-reference 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.

Catalog Facts
Item NameValve,air Venting,steam
FSC / FSG4520 — No Item Name Available (FSG 45)
ManufacturersGuardian Equipment Co Div of Water Saver Faucet Co (CAGE 59045)
Technical Specifications
ParameterValue
NSN4520-01-369-8053
Primary Part Number400-4-1
Item NameValve,air Venting,steam
FSC / FSG4520 / 45 — No Item Name Available
ManufacturerGuardian Equipment Co Div of Water Saver Faucet Co
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5935-00-201-8151 INTERCHANGEABLE
Adapter,connector
5950-00-686-6312152A654H01 INTERCHANGEABLE
Reactor
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
5330-01-055-6864W40041 INTERCHANGEABLE
Gasket
Rawson-Koenig Inc
4820-01-191-8894510-05 INTERCHANGEABLE
Stem,fluid Valve
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-204-059440041-503 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
5310-01-291-008540041 INTERCHANGEABLE
Washer,spring Tension
Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division
5310-01-304-921040041 INTERCHANGEABLE
Nut,plain,hexagon
American Machinery Inc Dba Amr American Machinery & Re-Mfg. Div Amr-Dod Contracting
3120-01-340-688140041 INTERCHANGEABLE
Bearing,sleeve
Hoffman/new Yorker, Inc.
4820-01-388-124440041-806 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-394-619340041-1 INTERCHANGEABLE
Cap,valve
Morpac Industries, Inc Div Actuator
Cross-Reference Index
Part NumberManufacturer
400-4-1 Guardian Equipment Co Div of Water Saver Faucet Co (USA)
Related Parts
5935-00-201-8151INTERCHANGEABLE
ADAPTER,CONNECTOR
5950-00-686-6312INTERCHANGEABLE
REACTOR
152A654H01
5330-01-055-6864INTERCHANGEABLE
GASKET
W40041
4820-01-191-8894INTERCHANGEABLE
STEM,FLUID VALVE
510-05
4820-01-204-0594INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
40041-503
5310-01-291-0085INTERCHANGEABLE
WASHER,SPRING TENSION
40041
5310-01-304-9210INTERCHANGEABLE
NUT,PLAIN,HEXAGON
40041
3120-01-340-6881INTERCHANGEABLE
BEARING,SLEEVE
40041
4820-01-388-1244INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
40041-806
4820-01-394-6193INTERCHANGEABLE
CAP,VALVE
40041-1
8465-01-541-8299INTERCHANGEABLE
HYDRATION SYSTEM
40041
5310-01-653-7780INTERCHANGEABLE
WASHER,FLAT
4-0234

Frequently Asked Questions

What is NSN 4520-01-369-8053?

NSN 4520-01-369-8053 is a Valve,air Venting,steam, manufactured by Guardian Equipment Co Div of Water Saver Faucet Co, classified under FSC 4520 (No Item Name Available). Status: active.

What are the part numbers for NSN 4520-01-369-8053?

NSN 4520-01-369-8053 has 1 cross-referenced part number: 400-4-1 (Guardian Equipment Co Div of Water Saver Faucet Co).

What NSN replaces 4520-01-369-8053?

There are 12 known substitutes for 4520-01-369-8053: 5935-00-201-8151, 5950-00-686-6312, 5330-01-055-6864 and 9 more. Verify interchangeability with system specifications before substitution.

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