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PartsTable / COMPONENT / 40063-4 ITEM 20
40063-4 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 CORROSION RESISTING OVERALL, thread_class: 2A SINGLE THREADED PORTION A, thread_length: 0.172 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 1.625 INCHES NOMINAL IN, style_designator: THREADED FLANGED, nominal_thread_size: 1.500 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 4820-01-215-1568, 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
40063-4 ITEM 20
NSN: 4820-01-215-1568
FSC: 4820
CAGE: 55378 — TRAC REGULATOR CO., INC. DBA TRAC REGULATOR CO INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
thread_class2A SINGLE THREADED PORTION A
thread_length0.172 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter1.625 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
nominal_thread_size1.500 INCHES SINGLE THREADED PORTION IN
under_flange_height0.250 INCHES NOMINAL IN
body_inside_diameter1.125 INCHES NOMINAL IN
seating_surface_shapeFLAT
thread_series_designatorUNEF SINGLE THREADED PORTION
flange_seat_to_disk_end_height0.375 INCHES NOMINAL IN
NSN4820-01-215-1568
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 40063-4 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
•
FLANGE SEAT TO DISK END HEIGHT: 0.375 INCHES NOMINAL IN
•
FLANGE DIAMETER: 1.625 INCHES NOMINAL IN
•
SEATING SURFACE SHAPE: FLAT
•
UNDER FLANGE HEIGHT: 0.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: THREADED FLANGED
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
THREAD SERIES DESIGNATOR: UNEF SINGLE THREADED PORTION
•
THREAD CLASS: 2A SINGLE THREADED PORTION A
TECHNICAL CHARACTERISTICS (FLIS)
FLANGE SEAT TO DISK END HEIGHT0.375 INCHES NOMINAL IN
FLANGE DIAMETER1.625 INCHES NOMINAL IN
SEATING SURFACE SHAPEFLAT
UNDER FLANGE HEIGHT0.250 INCHES NOMINAL IN
STYLE DESIGNATORTHREADED FLANGED
MATERIALSTEEL CORROSION RESISTING OVERALL
THREAD SERIES DESIGNATORUNEF SINGLE THREADED PORTION
THREAD CLASS2A SINGLE THREADED PORTION A
BODY INSIDE DIAMETER1.125 INCHES NOMINAL IN
NOMINAL THREAD SIZE1.500 INCHES SINGLE THREADED PORTION IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
410519SSRInterchangeable
interchangeable cross-reference
interchangeable
M2621AInterchangeable
interchangeable cross-reference
interchangeable
301-SN-935Interchangeable
interchangeable cross-reference
interchangeable
11273Interchangeable
interchangeable cross-reference
interchangeable
PRP902-14Interchangeable
interchangeable cross-reference
interchangeable
24903Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 40063-4 ITEM 20?
40063-4 ITEM 20 is a SEAT,VALVE.
What parts can replace 40063-4 ITEM 20?
There are 19 known substitutes for 40063-4 ITEM 20: 410519SSR, M2621A, 301-SN-935 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 40063-4 ITEM 20?
40063-4 ITEM 20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-215-1568. 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