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PartsTable / COMPONENT / A12718-001-156
A12718-001-156 ✓ 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 COMP 303 OVERALL, thread_class: 2A SINGLE THREADED PORTION A, thread_length: 1.055 INCHES NOMINAL SINGLE THREADED PORTION IN, overall_height: 1.450 INCHES NOMINAL IN, style_designator: PLAIN THREADED, nominal_thread_size: 1.125 INCHES SINGLE THREADED PORTION 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 4820-01-050-7555, 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
A12718-001-156
NSN: 4820-01-050-7555
FSC: 4820
CAGE: 01343 — ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
thread_class2A SINGLE THREADED PORTION A
thread_length1.055 INCHES NOMINAL SINGLE THREADED PORTION IN
overall_height1.450 INCHES NOMINAL IN
style_designatorPLAIN THREADED
nominal_thread_size1.125 INCHES SINGLE THREADED PORTION IN
body_inside_diameter0.312 INCHES NOMINAL IN
seating_surface_shapeFLAT
thread_series_designatorUNEF SINGLE THREADED PORTION
material_document_and_classificationQQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4820-01-050-7555
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: A12718-001-156 · 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 THREADED
•
THREAD SERIES DESIGNATOR: UNEF SINGLE THREADED PORTION
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL COMP 303 OVERALL
•
BODY INSIDE DIAMETER: 0.312 INCHES NOMINAL IN
•
SEATING SURFACE SHAPE: FLAT
•
THREAD CLASS: 2A SINGLE THREADED PORTION A
•
NOMINAL THREAD SIZE: 1.125 INCHES SINGLE THREADED PORTION IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORPLAIN THREADED
THREAD SERIES DESIGNATORUNEF SINGLE THREADED PORTION
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 303 OVERALL
BODY INSIDE DIAMETER0.312 INCHES NOMINAL IN
SEATING SURFACE SHAPEFLAT
THREAD CLASS2A SINGLE THREADED PORTION A
NOMINAL THREAD SIZE1.125 INCHES SINGLE THREADED PORTION IN
OVERALL HEIGHT1.450 INCHES NOMINAL IN
THREAD LENGTH1.055 INCHES NOMINAL SINGLE THREADED PORTION IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
20306Interchangeable
interchangeable cross-reference
interchangeable
414Interchangeable
interchangeable cross-reference
interchangeable
SMB618526Interchangeable
interchangeable cross-reference
interchangeable
BB726Interchangeable
interchangeable cross-reference
interchangeable
941969R91Interchangeable
interchangeable cross-reference
interchangeable
MC144Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A12718-001-156?
A12718-001-156 is a SEAT,VALVE.
What parts can replace A12718-001-156?
There are 26 known substitutes for A12718-001-156: 20306, 414, SMB618526 and 23 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A12718-001-156?
A12718-001-156 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-050-7555. 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