PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

349-3552Valve,check

Caterpillar Inc Div Caterpillar Defense · NSN 4820-01-586-0172 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-586-0172 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-586-0172. Primary manufacturer part number: 349-3552.
Features
  • Valve,check — FSC 4820
  • 3 verified cross-references
  • Primary manufacturer: Caterpillar Inc Div Caterpillar Defense
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,check, cataloged under National Stock Number 4820-01-586-0172, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameValve,check
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersCaterpillar Inc Div Caterpillar Defense (CAGE 11083); Oshkosh Defense Llc (CAGE 75Q65); Oshkosh Corp (CAGE 45152)
Technical Specifications
ParameterValue
NSN4820-01-586-0172
Primary Part Number349-3552
Item NameValve,check
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
6150-01-347-92894086974 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Unison Industries Llc
1680-01-714-5973 INTERCHANGEABLE
Shroud,tank
Cross-Reference Index
Part NumberManufacturer
349-3552 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
4075528 Oshkosh Defense Llc (USA)
4075228 Oshkosh Corp (USA)
Related Parts
6150-01-347-9289INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
4086974
1680-01-714-5973INTERCHANGEABLE
SHROUD,TANK

Frequently Asked Questions

What is NSN 4820-01-586-0172?

NSN 4820-01-586-0172 is a Valve,check, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-586-0172?

NSN 4820-01-586-0172 has 3 cross-referenced part numbers: 349-3552 (Caterpillar Inc Div Caterpillar Defense), 4075528 (Oshkosh Defense Llc), 4075228 (Oshkosh Corp).

What NSN replaces 4820-01-586-0172?

There are 2 known substitutes for 4820-01-586-0172: 6150-01-347-9289, 1680-01-714-5973. Verify interchangeability with system specifications before substitution.

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