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M11718ITEM4 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

M11718ITEM4: SEAT,VALVE.

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: 0.312 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 2.625 INCHES NOMINAL IN, style_designator: THREADED FLANGED, nominal_thread_size: 2.375 INCHES SINGLE THREADED PORTION IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-255-5809, 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
M11718ITEM4
NSN: 4820-00-255-5809
FSC: 4820 — Valves, Nonpowered
CAGE: K2980 — SHIPHAM VALVES LIMITED (GBR)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class3A SINGLE THREADED PORTION A
thread_length0.312 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter2.625 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
nominal_thread_size2.375 INCHES SINGLE THREADED PORTION IN
under_flange_height0.312 INCHES NOMINAL IN
body_inside_diameter2.000 INCHES NOMINAL IN
seating_surface_shapeFLAT
thread_quantity_per_inch16 SINGLE THREADED PORTION
thread_series_designatorUN SINGLE THREADED PORTION
flange_seat_to_disk_end_height0.125 INCHES NOMINAL IN
NSN4820-00-255-5809
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: M11718ITEM4 · 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
•
FLANGE SEAT TO DISK END HEIGHT: 0.125 INCHES NOMINAL IN
•
FLANGE DIAMETER: 2.625 INCHES NOMINAL IN
•
THREAD LENGTH: 0.312 INCHES NOMINAL SINGLE THREADED PORTION IN
•
STYLE DESIGNATOR: THREADED FLANGED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MONEL BS3071NA13 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
BODY INSIDE DIAMETER: 2.000 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 2.375 INCHES SINGLE THREADED PORTION IN
•
UNDER FLANGE HEIGHT: 0.312 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.125 INCHES NOMINAL IN
FLANGE DIAMETER2.625 INCHES NOMINAL IN
THREAD LENGTH0.312 INCHES NOMINAL SINGLE THREADED PORTION IN
STYLE DESIGNATORTHREADED FLANGED
MATERIAL DOCUMENT AND CLASSIFICATIONMONEL BS3071NA13 MFR REF SINGLE MATERIAL RESPONSE OVERALL
BODY INSIDE DIAMETER2.000 INCHES NOMINAL IN
NOMINAL THREAD SIZE2.375 INCHES SINGLE THREADED PORTION IN
UNDER FLANGE HEIGHT0.312 INCHES NOMINAL IN
THREAD CLASS3A SINGLE THREADED PORTION A
THREAD QUANTITY PER INCH16 SINGLE THREADED PORTION
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES 2
M10987/2Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
M11718IM4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is M11718ITEM4?
M11718ITEM4 is a SEAT,VALVE.
What parts can replace M11718ITEM4?
There are 2 known substitutes for M11718ITEM4: M10987/2, M11718IM4. Substitute compatibility should be verified for your specific system.
What is the NSN for M11718ITEM4?
M11718ITEM4 is cataloged in the U.S. Government catalog under NSN 4820-00-255-5809. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.