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Technical Data Sheet
PartsTable / COMPONENT / 64788D
64788D ✓ 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: NICKEL ALLOY OVERALL, thread_class: 1B FIRST THREADED PORTION, flange_diameter: 0.880 INCHES NOMINAL IN, nominal_thread_size: 0.375 INCHES SECOND THREADED PORTION IN, under_flange_height: 0.687 INCHES NOMINAL IN, seating_surface_shape: FLAT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-220-0932, 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
64788D
NSN: 4820-01-220-0932
FSC: 4820
CAGE: 86184 — GRISWOLD INDUSTRIES DBA CLA-VAL CO (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class1B FIRST THREADED PORTION
flange_diameter0.880 INCHES NOMINAL IN
nominal_thread_size0.375 INCHES SECOND THREADED PORTION IN
under_flange_height0.687 INCHES NOMINAL IN
seating_surface_shapeFLAT
thread_series_designatorNPT SECOND THREADED PORTION
flange_seat_to_disk_end_height0.753 INCHES NOMINAL IN
NSN4820-01-220-0932
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 64788D · 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 SERIES DESIGNATOR: NPT SECOND THREADED PORTION
•
MATERIAL: NICKEL ALLOY OVERALL
•
NOMINAL THREAD SIZE: 0.375 INCHES SECOND THREADED PORTION IN
•
FLANGE DIAMETER: 0.880 INCHES NOMINAL IN
•
FLANGE SEAT TO DISK END HEIGHT: 0.753 INCHES NOMINAL IN
•
SEATING SURFACE SHAPE: FLAT
•
THREAD CLASS: 1B FIRST THREADED PORTION
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORNPT SECOND THREADED PORTION
MATERIALNICKEL ALLOY OVERALL
NOMINAL THREAD SIZE0.375 INCHES SECOND THREADED PORTION IN
FLANGE DIAMETER0.880 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.625 INCHES FIRST THREADED PORTION IN
FLANGE SEAT TO DISK END HEIGHT0.753 INCHES NOMINAL IN
SEATING SURFACE SHAPEFLAT
THREAD CLASS1B FIRST THREADED PORTION
THREAD SERIES DESIGNATORUNF FIRST THREADED PORTION
UNDER FLANGE HEIGHT0.687 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
43798Interchangeable
interchangeable cross-reference
interchangeable
111047R1Interchangeable
interchangeable cross-reference
interchangeable
2246365Interchangeable
interchangeable cross-reference
interchangeable
E2755PC11-13-14Interchangeable
interchangeable cross-reference
interchangeable
31651Interchangeable
interchangeable cross-reference
interchangeable
E3041PC11-13-14Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 64788D?
64788D is a SEAT,VALVE.
What parts can replace 64788D?
There are 16 known substitutes for 64788D: 43798, 111047R1, 2246365 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 64788D?
64788D is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-220-0932. 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