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PartsTable / COMPONENT / A1806-001-127
A1806-001-127 ✓ 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: 2A SINGLE THREADED PORTION A, thread_length: 0.656 INCHES NOMINAL SINGLE THREADED PORTION IN, overall_height: 0.781 INCHES NOMINAL IN, style_designator: PLAIN THREADED, nominal_thread_size: 1.000 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 4820-00-301-4947, 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
A1806-001-127
NSN: 4820-00-301-4947
FSC: 4820
CAGE: 01343 — ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class2A SINGLE THREADED PORTION A
thread_length0.656 INCHES NOMINAL SINGLE THREADED PORTION IN
overall_height0.781 INCHES NOMINAL IN
style_designatorPLAIN THREADED
nominal_thread_size1.000 INCHES SINGLE THREADED PORTION IN
body_inside_diameter0.750 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
seating_surface_shapeFLAT
thread_series_designatorUNEF SINGLE THREADED PORTION
NSN4820-00-301-4947
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: A1806-001-127 · 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 SERIES DESIGNATOR: UNEF SINGLE THREADED PORTION
•
MATERIAL: NICKEL ALLOY OVERALL
•
STYLE DESIGNATOR: PLAIN THREADED
•
THREAD LENGTH: 0.656 INCHES NOMINAL SINGLE THREADED PORTION IN
•
BODY INSIDE DIAMETER: 0.750 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
•
THREAD CLASS: 2A SINGLE THREADED PORTION A
•
SEATING SURFACE SHAPE: FLAT
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNEF SINGLE THREADED PORTION
MATERIALNICKEL ALLOY OVERALL
STYLE DESIGNATORPLAIN THREADED
THREAD LENGTH0.656 INCHES NOMINAL SINGLE THREADED PORTION IN
BODY INSIDE DIAMETER0.750 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
THREAD CLASS2A SINGLE THREADED PORTION A
OVERALL HEIGHT0.781 INCHES NOMINAL IN
SEATING SURFACE SHAPEFLAT
NOMINAL THREAD SIZE1.000 INCHES SINGLE THREADED PORTION IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
51109Interchangeable
interchangeable cross-reference
interchangeable
A1806Interchangeable
interchangeable cross-reference
interchangeable
21-100004Interchangeable
interchangeable cross-reference
interchangeable
T2761Interchangeable
interchangeable cross-reference
interchangeable
QQ-A-200/3Interchangeable
interchangeable cross-reference
interchangeable
121Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A1806-001-127?
A1806-001-127 is a SEAT,VALVE.
What parts can replace A1806-001-127?
There are 9 known substitutes for A1806-001-127: 51109, A1806, 21-100004 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A1806-001-127?
A1806-001-127 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-301-4947. 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