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Technical Data Sheet
PartsTable / COMPONENT / 056325 ITEM 20
056325 ITEM 20 ✓ 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 COMP 416 OVERALL, thread_class: 3A SINGLE THREADED PORTION A, thread_length: 0.533 INCHES NOMINAL SINGLE THREADED PORTION IN, overall_height: 0.703 INCHES NOMINAL IN, style_designator: PLAIN THREADED, nominal_thread_size: 3.875 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 4820-01-161-1252, 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
056325 ITEM 20
NSN: 4820-01-161-1252
FSC: 4820
CAGE: 48422 — WILLIAM POWELL COMPANY, THE DBA POWELL VALVE DIV THE STARFLO CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 416 OVERALL
thread_class3A SINGLE THREADED PORTION A
thread_length0.533 INCHES NOMINAL SINGLE THREADED PORTION IN
overall_height0.703 INCHES NOMINAL IN
style_designatorPLAIN THREADED
nominal_thread_size3.875 INCHES SINGLE THREADED PORTION IN
body_inside_diameter3.188 INCHES NOMINAL IN
seating_surface_shapeFLAT
thread_quantity_per_inch14 SINGLE THREADED PORTION
thread_series_designatorUNS SINGLE THREADED PORTION
material_document_and_classificationASTM A473 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4820-01-161-1252
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 056325 ITEM 20 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A473 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD SERIES DESIGNATOR: UNS SINGLE THREADED PORTION
•
STYLE DESIGNATOR: PLAIN THREADED
•
MATERIAL: STEEL COMP 416 OVERALL
•
THREAD QUANTITY PER INCH: 14 SINGLE THREADED PORTION
•
THREAD CLASS: 3A SINGLE THREADED PORTION A
•
NOMINAL THREAD SIZE: 3.875 INCHES SINGLE THREADED PORTION IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A473 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD SERIES DESIGNATORUNS SINGLE THREADED PORTION
STYLE DESIGNATORPLAIN THREADED
MATERIALSTEEL COMP 416 OVERALL
THREAD QUANTITY PER INCH14 SINGLE THREADED PORTION
THREAD CLASS3A SINGLE THREADED PORTION A
OVERALL HEIGHT0.703 INCHES NOMINAL IN
NOMINAL THREAD SIZE3.875 INCHES SINGLE THREADED PORTION IN
BODY INSIDE DIAMETER3.188 INCHES NOMINAL IN
SEATING SURFACE SHAPEFLAT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
831181961650200Interchangeable
interchangeable cross-reference
interchangeable
118196Interchangeable
interchangeable cross-reference
interchangeable
056325 ITEM 19Interchangeable
interchangeable cross-reference
interchangeable
128811Interchangeable
interchangeable cross-reference
interchangeable
056325Interchangeable
interchangeable cross-reference
interchangeable
109346-5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 056325 ITEM 20?
056325 ITEM 20 is a SEAT,VALVE.
What parts can replace 056325 ITEM 20?
There are 7 known substitutes for 056325 ITEM 20: 831181961650200, 118196, 056325 ITEM 19 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 056325 ITEM 20?
056325 ITEM 20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-161-1252. 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