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PartsTable / COMPONENT / 40064-4 ITEM 20
40064-4 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: 3A SINGLE THREADED PORTION A, thread_length: 0.172 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 1.750 INCHES NOMINAL IN, special_features: LOWER SEAT, style_designator: THREADED FLANGED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-214-3808, 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
40064-4 ITEM 20
NSN: 4820-01-214-3808
FSC: 4820
CAGE: 55378 — TRAC REGULATOR CO., INC. DBA TRAC REGULATOR CO INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
thread_class3A SINGLE THREADED PORTION A
thread_length0.172 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter1.750 INCHES NOMINAL IN
special_featuresLOWER SEAT
style_designatorTHREADED FLANGED
nominal_thread_size1.625 INCHES SINGLE THREADED PORTION IN
under_flange_height0.250 INCHES NOMINAL IN
body_inside_diameter1.375 INCHES NOMINAL IN
seating_surface_shapeFLAT
thread_quantity_per_inch18 SINGLE THREADED PORTION
thread_series_designatorUN SINGLE THREADED PORTION
NSN4820-01-214-3808
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 40064-4 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
•
UNDER FLANGE HEIGHT: 0.250 INCHES NOMINAL IN
•
BODY INSIDE DIAMETER: 1.375 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 1.625 INCHES SINGLE THREADED PORTION IN
•
STYLE DESIGNATOR: THREADED FLANGED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
THREAD SERIES DESIGNATOR: UN SINGLE THREADED PORTION
TECHNICAL CHARACTERISTICS (FLIS)
UNDER FLANGE HEIGHT0.250 INCHES NOMINAL IN
BODY INSIDE DIAMETER1.375 INCHES NOMINAL IN
NOMINAL THREAD SIZE1.625 INCHES SINGLE THREADED PORTION IN
SPECIAL FEATURESLOWER SEAT
STYLE DESIGNATORTHREADED FLANGED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL CORROSION RESISTING OVERALL
THREAD SERIES DESIGNATORUN SINGLE THREADED PORTION
SEATING SURFACE SHAPEFLAT
FLANGE DIAMETER1.750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
400644Interchangeable
interchangeable cross-reference
interchangeable
406371Interchangeable
interchangeable cross-reference
interchangeable
40064-4 ITEM 16Interchangeable
interchangeable cross-reference
interchangeable
383-08Interchangeable
interchangeable cross-reference
interchangeable
254-03Interchangeable
interchangeable cross-reference
interchangeable
40064-4 ITEM 22Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 40064-4 ITEM 20?
40064-4 ITEM 20 is a SEAT,VALVE.
What parts can replace 40064-4 ITEM 20?
There are 18 known substitutes for 40064-4 ITEM 20: 400644, 406371, 40064-4 ITEM 16 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 40064-4 ITEM 20?
40064-4 ITEM 20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-214-3808. 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