PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

HLK-TA-STYLEBU2-1.25INValve,regulating,temperature

Aerco International, Inc. Dba Aerco International Inc · NSN 4820-01-271-3590 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-271-3590 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-271-3590. Primary manufacturer part number: HLK-TA-STYLEBU2-1.25IN.
Features
  • Valve,regulating,temperature — FSC 4820
  • Material: PLASTIC POLYTETRAFLUOROETHYLENE SEAT
  • Flow Control Device: PLUG
  • Criticality Code Justification: ZZZY
  • Material: COPPER ALLOY BODY
  • Temp Rating: 200.0 FAHRENHEIT NOMINAL DEGF
  • Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
  • 4 verified cross-references
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Plastic Polytetrafluoroethylene Seat construction
General Description

The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-271-3590, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Aerco International, Inc. Dba Aerco International Inc. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references 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.

Technical Specifications
ParameterValue
NSN4820-01-271-3590
Primary Part NumberHLK-TA-STYLEBU2-1.25IN
Item NameValve,regulating,temperature
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAerco International, Inc. Dba Aerco International Inc
StatusACTIVE
MaterialPLASTIC POLYTETRAFLUOROETHYLENE SEAT
Flow Control DevicePLUG
Criticality Code JustificationZZZY
MaterialCOPPER ALLOY BODY
Temp Rating200.0 FAHRENHEIT NOMINAL DEGF
Reference Number Differentiating CharacteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-01-041-262116217 INTERCHANGEABLE
Stem,fluid Valve
Aerco International, Inc. Dba Aerco International Inc
4820-01-158-690510014-1 INTERCHANGEABLE
Piston Cup,valve
Aerco International, Inc. Dba Aerco International Inc
2910-01-161-653620155 INTERCHANGEABLE
Head and Rotor,pump
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
2990-01-197-775020155 INTERCHANGEABLE
Retainer,rope Starter
Brunswick Corp Dba Mercury Marine Div Mercury Marine
4820-01-204-8442303-67 INTERCHANGEABLE
Insert,seat Ring
Aerco International, Inc. Dba Aerco International Inc
5330-01-204-844316016 INTERCHANGEABLE
Seal,liner Assembly
Aerco International, Inc. Dba Aerco International Inc
4820-01-204-851420005 INTERCHANGEABLE
Disk,valve
Aerco International, Inc. Dba Aerco International Inc
4820-01-210-038812360 INTERCHANGEABLE
Piston,valve
Aerco International, Inc. Dba Aerco International Inc
4820-01-220-217516004 INTERCHANGEABLE
Stem,fluid Valve
Aerco International, Inc. Dba Aerco International Inc
3110-01-257-6119 INTERCHANGEABLE
Bearing,ball,annular
Cross-Reference Index
Part NumberManufacturer
HLK-TA-STYLEBU2-1.25IN Aerco International, Inc. Dba Aerco International Inc (USA)
20155-1.25IN Aerco International, Inc. Dba Aerco International Inc (USA)
HLK-TA-BU2 1 1-4IN Aerco International, Inc. Dba Aerco International Inc (USA)
20155 Aerco International, Inc. Dba Aerco International Inc (USA)
Related Parts
4820-01-041-2621INTERCHANGEABLE
STEM,FLUID VALVE
16217
4820-01-158-6905INTERCHANGEABLE
PISTON CUP,VALVE
10014-1
2910-01-161-6536INTERCHANGEABLE
HEAD AND ROTOR,PUMP
20155
2990-01-197-7750INTERCHANGEABLE
RETAINER,ROPE STARTER
20155
4820-01-204-8442INTERCHANGEABLE
INSERT,SEAT RING
303-67
5330-01-204-8443INTERCHANGEABLE
SEAL,LINER ASSEMBLY
16016
4820-01-204-8514INTERCHANGEABLE
DISK,VALVE
20005
4820-01-210-0388INTERCHANGEABLE
PISTON,VALVE
12360
4820-01-220-2175INTERCHANGEABLE
STEM,FLUID VALVE
16004
3110-01-257-6119INTERCHANGEABLE
BEARING,BALL,ANNULAR
5961-01-258-0808INTERCHANGEABLE
COVER,SEMICONDUCTOR DEVICE
5895-01-454-5698INTERCHANGEABLE
DIVIDER,POWER,RADIO FREQUENCY
201.55

Frequently Asked Questions

What is NSN 4820-01-271-3590?

NSN 4820-01-271-3590 is a Valve,regulating,temperature, manufactured by Aerco International, Inc. Dba Aerco International Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-271-3590?

NSN 4820-01-271-3590 has 4 cross-referenced part numbers: HLK-TA-STYLEBU2-1.25IN (Aerco International, Inc. Dba Aerco International Inc), 20155-1.25IN (Aerco International, Inc. Dba Aerco International Inc), HLK-TA-BU2 1 1-4IN (Aerco International, Inc. Dba Aerco International Inc), 20155 (Aerco International, Inc. Dba Aerco International Inc).

What NSN replaces 4820-01-271-3590?

There are 12 known substitutes for 4820-01-271-3590: 4820-01-041-2621, 4820-01-158-6905, 2910-01-161-6536 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of HLK-TA-STYLEBU2-1.25IN?

Key specifications for HLK-TA-STYLEBU2-1.25IN: Material: PLASTIC POLYTETRAFLUOROETHYLENE SEAT; Flow Control Device: PLUG; Criticality Code Justification: ZZZY; Material: COPPER ALLOY BODY. 6 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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