PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A1171TTValve,flow Control

Portland Valve Llc · NSN 4820-00-441-2594 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-441-2594 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-441-2594. Primary manufacturer part number: A1171TT.
Features
  • Valve,flow Control — FSC 4820
  • 3 verified cross-references
  • Primary manufacturer: Portland Valve Llc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,flow Control, cataloged under National Stock Number 4820-00-441-2594, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Portland Valve Llc. This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-441-2594
Primary Part NumberA1171TT
Item NameValve,flow Control
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerPortland Valve Llc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
6750-01-382-0788 INTERCHANGEABLE
Paper,photographic
5210-01-391-02240349 INTERCHANGEABLE
Level,cylindrical,circular Vial
Empire Level Mfg Co
Cross-Reference Index
Part NumberManufacturer
A1171TT PRIMARY Portland Valve Llc (USA)
A1171TT1 1-2IN Metso Automation Usa, Inc (USA)
0-349 Portland Valve Llc (USA)
Related Parts
6750-01-382-0788INTERCHANGEABLE
PAPER,PHOTOGRAPHIC
5210-01-391-0224INTERCHANGEABLE
LEVEL,CYLINDRICAL,CIRCULAR VIAL
0349

Frequently Asked Questions

What is NSN 4820-00-441-2594?

NSN 4820-00-441-2594 is a Valve,flow Control, manufactured by Portland Valve Llc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-441-2594?

NSN 4820-00-441-2594 has 3 cross-referenced part numbers: A1171TT (Portland Valve Llc), A1171TT1 1-2IN (Metso Automation Usa, Inc), 0-349 (Portland Valve Llc).

What NSN replaces 4820-00-441-2594?

There are 2 known substitutes for 4820-00-441-2594: 6750-01-382-0788, 5210-01-391-0224. Verify interchangeability with system specifications before substitution.

What are the specifications of A1171TT?

Key specifications for A1171TT: End Item Identification: HYDRAULIC VALVE. 1 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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