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Technical Data Sheet
PartsTable / COMPONENT / 803-1385637-08X-08
803-1385637-08X-08 ✓ 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: 3A SINGLE THREADED PORTION A, thread_length: 0.750 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 9.125 INCHES NOMINAL IN, style_designator: THREADED FLANGED, under_flange_height: 0.750 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-243-6698, 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
803-1385637-08X-08
NSN: 4820-00-243-6698
FSC: 4820
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class3A SINGLE THREADED PORTION A
thread_length0.750 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter9.125 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
under_flange_height0.750 INCHES NOMINAL IN
body_inside_diameter7.938 INCHES NOMINAL IN
seating_surface_shapeFLAT
end_item_identification8" SWING CHECK VALVE, P/N 803-1385637-08X
thread_quantity_per_inch12 SINGLE THREADED PORTION
thread_series_designatorUNS SINGLE THREADED PORTION
flange_seat_to_disk_end_height1.094 INCHES NOMINAL IN
NSN4820-00-243-6698
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 803-1385637-08X-08 · 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
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
TECHNICAL CHARACTERISTICS (FLIS)
CRITICALITY CODE JUSTIFICATIONZZZY
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
1385637Interchangeable
interchangeable cross-reference
interchangeable
803-1385637-08X-08Interchangeable
interchangeable cross-reference
interchangeable
810-1385637-8-08Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 803-1385637-08X-08?
803-1385637-08X-08 is a SEAT,VALVE.
What parts can replace 803-1385637-08X-08?
There are 3 known substitutes for 803-1385637-08X-08: 1385637, 803-1385637-08X-08, 810-1385637-8-08. Substitute compatibility should be verified for your specific system.
What is the NSN for 803-1385637-08X-08?
803-1385637-08X-08 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-243-6698. 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