PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18539NValve,pilot,pressure

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-140-2088 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-140-2088 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-140-2088. Primary manufacturer part number: 18539N.
Features
  • Valve,pilot,pressure — FSC 4820
  • General Characteristics Item Description: CAST BRONZE BODY; FLANGE 1/2 IN. 150 PSI,ASA FLANGE DRILLED 4 HOLE 5/8 IN. DIA ON 2-3/8 IN. BOLT CRCLE DIA; W/GAUGE 0 TO 30 PSI; O/A DIM. 6.125 IN W BY 9.750 IN. H IN
  • 2 verified cross-references
  • Primary manufacturer: Leslie Controls, Inc. Dba Leslie Controls Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,pilot,pressure, cataloged under National Stock Number 4820-01-140-2088, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, 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
NSN4820-01-140-2088
Primary Part Number18539N
Item NameValve,pilot,pressure
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
General Characteristics Item DescriptionCAST BRONZE BODY; FLANGE 1/2 IN. 150 PSI,ASA FLANGE DRILLED 4 HOLE 5/8 IN. DIA ON 2-3/8 IN. BOLT CRCLE DIA; W/GAUGE 0 TO 30 PSI; O/A DIM. 6.125 IN W BY 9.750 IN. H IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
4820-01-140-2087N21764 INTERCHANGEABLE
Yoke,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-140-4884N26050 INTERCHANGEABLE
Retainer,seat,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
Cross-Reference Index
Part NumberManufacturer
18539N PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
RAN 18539N Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
4820-01-140-2087INTERCHANGEABLE
YOKE,VALVE
N21764
4820-01-140-4884INTERCHANGEABLE
RETAINER,SEAT,VALVE
N26050

Frequently Asked Questions

What is NSN 4820-01-140-2088?

NSN 4820-01-140-2088 is a Valve,pilot,pressure, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-140-2088?

NSN 4820-01-140-2088 has 2 cross-referenced part numbers: 18539N (Leslie Controls, Inc. Dba Leslie Controls Inc), RAN 18539N (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-01-140-2088?

There are 2 known substitutes for 4820-01-140-2088: 4820-01-140-2087, 4820-01-140-4884. Verify interchangeability with system specifications before substitution.

What are the specifications of 18539N?

Key specifications for 18539N: General Characteristics Item Description: CAST BRONZE BODY; FLANGE 1/2 IN. 150 PSI,ASA FLANGE DRILLED 4 HOLE 5/8 IN. DIA ON 2-3/8 IN. BOLT CRCLE DIA; W/GAUGE 0 TO 30 PSI; O/A DIM. 6.125 IN W BY 9.750 IN. H IN. 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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