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Technical Data Sheet
PartsTable / COMPONENT / C4759B
C4759B ✓ 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: COPPER ALLOY OVERALL, seat_radius: 0.250 INCHES NOMINAL IN, thread_class: 2A SINGLE THREADED PORTION A, thread_length: 0.500 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 6.188 INCHES NOMINAL IN, 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 4820-01-088-0897, 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
C4759B
NSN: 4820-01-088-0897
FSC: 4820
CAGE: 86184 — GRISWOLD INDUSTRIES DBA CLA-VAL CO (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
seat_radius0.250 INCHES NOMINAL IN
thread_class2A SINGLE THREADED PORTION A
thread_length0.500 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter6.188 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
nominal_thread_size5.750 INCHES SINGLE THREADED PORTION IN
under_flange_height2.250 INCHES NOMINAL IN
seating_surface_shapeRADIAL
thread_quantity_per_inch12 SINGLE THREADED PORTION
thread_series_designatorUN SINGLE THREADED PORTION
body_stepped_inside_diameter5.065 INCHES NOMINAL SECOND STEP IN
NSN4820-01-088-0897
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: C4759B · 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
•
BODY STEPPED INSIDE DIAMETER: 5.065 INCHES NOMINAL SECOND STEP IN
•
THREAD CLASS: 2A SINGLE THREADED PORTION A
•
MATERIAL: COPPER ALLOY OVERALL
•
THREAD SERIES DESIGNATOR: UN SINGLE THREADED PORTION
•
STYLE DESIGNATOR: THREADED FLANGED
•
THREAD QUANTITY PER INCH: 12 SINGLE THREADED PORTION
•
NOMINAL THREAD SIZE: 5.750 INCHES SINGLE THREADED PORTION IN
TECHNICAL CHARACTERISTICS (FLIS)
BODY STEPPED INSIDE DIAMETER5.065 INCHES NOMINAL SECOND STEP IN
THREAD CLASS2A SINGLE THREADED PORTION A
MATERIALCOPPER ALLOY OVERALL
THREAD SERIES DESIGNATORUN SINGLE THREADED PORTION
STYLE DESIGNATORTHREADED FLANGED
THREAD QUANTITY PER INCH12 SINGLE THREADED PORTION
NOMINAL THREAD SIZE5.750 INCHES SINGLE THREADED PORTION IN
BODY STEPPED INSIDE DIAMETER5.130 INCHES NOMINAL FIRST STEP IN
FLANGE SEAT TO DISK END HEIGHT0.405 INCHES NOMINAL IN
BODY STEPPED INSIDE DIAMETER5.000 INCHES NOMINAL THIRD STEP IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
C4759Interchangeable
interchangeable cross-reference
interchangeable
6774PC11Interchangeable
interchangeable cross-reference
interchangeable
820-4384246Interchangeable
interchangeable cross-reference
interchangeable
B2579Interchangeable
interchangeable cross-reference
interchangeable
D2334Interchangeable
interchangeable cross-reference
interchangeable
D2334 PIECE 40 1 1/2INInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C4759B?
C4759B is a SEAT,VALVE.
What parts can replace C4759B?
There are 8 known substitutes for C4759B: C4759, 6774PC11, 820-4384246 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C4759B?
C4759B is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-088-0897. 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