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Technical Data Sheet
PartsTable / COMPONENT / 27425-33
27425-33 ✓ 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 SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_class: 3A SINGLE THREADED PORTION A, thread_length: 0.500 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 2.750 INCHES NOMINAL IN, style_designator: THREADED FLANGED, nominal_thread_size: 2.500 INCHES SINGLE THREADED PORTION 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 4820-01-171-4433, 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
27425-33
NSN: 4820-01-171-4433
FSC: 4820
CAGE: 35795 — LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_class3A SINGLE THREADED PORTION A
thread_length0.500 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter2.750 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
nominal_thread_size2.500 INCHES SINGLE THREADED PORTION IN
under_flange_height0.625 INCHES NOMINAL IN
body_inside_diameter2.000 INCHES NOMINAL IN
seating_surface_shapeFLAT
seal_accommodation_typeGROOVED
thread_quantity_per_inch14 SINGLE THREADED PORTION
thread_series_designatorUNS SINGLE THREADED PORTION
NSN4820-01-171-4433
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 27425-33 · 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
•
THREAD CLASS: 3A SINGLE THREADED PORTION A
•
UNDER FLANGE HEIGHT: 0.625 INCHES NOMINAL IN
•
THREAD SERIES DESIGNATOR: UNS SINGLE THREADED PORTION
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: THREADED FLANGED
•
SEAL ACCOMMODATION TYPE: GROOVED
•
FLANGE DIAMETER: 2.750 INCHES NOMINAL IN
•
BODY INSIDE DIAMETER: 2.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3A SINGLE THREADED PORTION A
UNDER FLANGE HEIGHT0.625 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNS SINGLE THREADED PORTION
MATERIALSTEEL OVERALL
STYLE DESIGNATORTHREADED FLANGED
SEAL ACCOMMODATION TYPEGROOVED
FLANGE DIAMETER2.750 INCHES NOMINAL IN
BODY INSIDE DIAMETER2.000 INCHES NOMINAL IN
THREAD LENGTH0.500 INCHES NOMINAL SINGLE THREADED PORTION IN
NOMINAL THREAD SIZE2.500 INCHES SINGLE THREADED PORTION IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
027425Interchangeable
interchangeable cross-reference
interchangeable
27425Interchangeable
interchangeable cross-reference
interchangeable
7406366Interchangeable
interchangeable cross-reference
interchangeable
915820Interchangeable
interchangeable cross-reference
interchangeable
7413284Interchangeable
interchangeable cross-reference
interchangeable
2858W101Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 27425-33?
27425-33 is a SEAT,VALVE.
What parts can replace 27425-33?
There are 10 known substitutes for 27425-33: 027425, 27425, 7406366 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 27425-33?
27425-33 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-171-4433. 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