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T668-9PC18 — Technical Data Sheet

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— · 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 COMP 4621H OVERALL, thread_class: 2A SINGLE THREADED PORTION A, thread_length: 0.438 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 0.615 INCHES NOMINAL IN, style_designator: THREADED FLANGED, surface_treatment: ANODIZE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4820-00-389-4577, 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
T668-9PC18
NSN: 4820-00-389-4577
FSC: 4820
CAGE: 35795 — LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC (USA)
SPECIFICATIONS
materialSTEEL COMP 4621H OVERALL
thread_class2A SINGLE THREADED PORTION A
thread_length0.438 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter0.615 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
surface_treatmentANODIZE OVERALL
nominal_thread_size0.376 INCHES SINGLE THREADED PORTION IN
under_flange_height0.438 INCHES NOMINAL IN
body_inside_diameter0.156 INCHES NOMINAL IN
seating_surface_shapeFLAT
thread_quantity_per_inch32 SINGLE THREADED PORTION
thread_series_designatorUN SINGLE THREADED PORTION
NSN4820-00-389-4577
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: T668-9PC18 · 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 LENGTH: 0.438 INCHES NOMINAL SINGLE THREADED PORTION IN
•
FLANGE DIAMETER: 0.615 INCHES NOMINAL IN
•
STYLE DESIGNATOR: THREADED FLANGED
•
SURFACE TREATMENT: ANODIZE OVERALL
•
MATERIAL: STEEL COMP 4621H OVERALL
•
THREAD SERIES DESIGNATOR: UN SINGLE THREADED PORTION
•
THREAD CLASS: 2A SINGLE THREADED PORTION A
•
FLANGE SEAT TO DISK END HEIGHT: 0.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
THREAD LENGTH0.438 INCHES NOMINAL SINGLE THREADED PORTION IN
FLANGE DIAMETER0.615 INCHES NOMINAL IN
STYLE DESIGNATORTHREADED FLANGED
SURFACE TREATMENTANODIZE OVERALL
MATERIALSTEEL COMP 4621H OVERALL
THREAD SERIES DESIGNATORUN SINGLE THREADED PORTION
THREAD CLASS2A SINGLE THREADED PORTION A
FLANGE SEAT TO DISK END HEIGHT0.125 INCHES NOMINAL IN
BODY INSIDE DIAMETER0.156 INCHES NOMINAL IN
UNDER FLANGE HEIGHT0.438 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
105-08InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
10508-50OHMInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
8496111InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
17543PInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SL10662PC26InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
807005-32InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is T668-9PC18?
T668-9PC18 is a SEAT,VALVE.
What parts can replace T668-9PC18?
There are 25 known substitutes for T668-9PC18: 105-08, 10508-50OHM, 8496111 and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for T668-9PC18?
T668-9PC18 is cataloged in the Federal Logistics Information System under NSN 4820-00-389-4577. 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: September 2026