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Technical Data Sheet
PartsTable / COMPONENT / 8656 ITEM 6
8656 ITEM 6 ✓ 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 BODY, style_designator: PLAIN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-351-2978, 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
8656 ITEM 6
NSN: 4820-01-351-2978
FSC: 4820
CAGE: 79342 — WILLIAM E WILLIAMS VALVE CORP (USA)
SPECIFICATIONS
materialSTEEL BODY
style_designatorPLAIN
NSN4820-01-351-2978
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 8656 ITEM 6 · 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
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL: STEEL BODY
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORPLAIN
MATERIALSTEEL BODY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
T-8656Interchangeable
interchangeable cross-reference
interchangeable
ABT8656Interchangeable
interchangeable cross-reference
interchangeable
8656Interchangeable
interchangeable cross-reference
interchangeable
BR27587G2Interchangeable
interchangeable cross-reference
interchangeable
40A106911Interchangeable
interchangeable cross-reference
interchangeable
701-80604Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8656 ITEM 6?
8656 ITEM 6 is a SEAT,VALVE.
What parts can replace 8656 ITEM 6?
There are 17 known substitutes for 8656 ITEM 6: T-8656, ABT8656, 8656 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8656 ITEM 6?
8656 ITEM 6 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-351-2978. 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