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Technical Data Sheet
PartsTable / COMPONENT / 18539N
18539N ✓ Verified by PartsTable
— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The VALVE,PILOT,PRESSURE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, overall_length: 0.656 INCHES NOMINAL IN, nominal_thread_size: 0.625 INCHES IN, material_document_and_classification: QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE, general_characteristics_item_description: CAST BRONZE,ASTM B62;0.812 IN.DIA; 1.375 IN.LG;THD 0.625-18 UNF. IN.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-140-2087, indicating validated use in U.S. government and defense logistics supply chains.

Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
18539N
NSN: 4820-01-140-2087
FSC: 4820
CAGE: 35795 — LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY
overall_length0.656 INCHES NOMINAL IN
nominal_thread_size0.625 INCHES IN
material_document_and_classificationQQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE
general_characteristics_item_descriptionCAST BRONZE,ASTM B62;0.812 IN.DIA; 1.375 IN.LG;THD 0.625-18 UNF. IN
NSN4820-01-140-2087
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 18539N · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: CAST BRONZE,ASTM B62;0.812 IN.DIA; 1.375 IN.LG;THD 0.625-18 UNF. IN
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONCAST BRONZE,ASTM B62;0.812 IN.DIA; 1.375 IN.LG;THD 0.625-18 UNF. IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
21764Interchangeable
interchangeable cross-reference
interchangeable
588 NO 6/0Interchangeable
interchangeable cross-reference
interchangeable
588-6/0Interchangeable
interchangeable cross-reference
interchangeable
29031Interchangeable
interchangeable cross-reference
interchangeable
34375WInterchangeable
interchangeable cross-reference
interchangeable
728967Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 18539N?
18539N is a VALVE,PILOT,PRESSURE.
What parts can replace 18539N?
There are 12 known substitutes for 18539N: 21764, 588 NO 6/0, 588-6/0 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 18539N?
18539N is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-140-2087. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026