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Technical Data Sheet
PartsTable / COMPONENT / 20266FN5
20266FN5 ✓ 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: 1.000 INCHES NOMINAL SINGLE THREADED PORTION IN, overall_height: 1.250 INCHES NOMINAL IN, special_features: END FROM SEATING SURFACE BROACHED TO 0.562 IN. HEX BY 0.250 IN DEEP FOR SEAT REMOVAL IN, style_designator: PLAIN THREADED.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-168-5684, 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
20266FN5
NSN: 4820-01-168-5684
FSC: 4820
CAGE: 01343 — ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class2A SINGLE THREADED PORTION A
thread_length1.000 INCHES NOMINAL SINGLE THREADED PORTION IN
overall_height1.250 INCHES NOMINAL IN
special_featuresEND FROM SEATING SURFACE BROACHED TO 0.562 IN. HEX BY 0.250 IN DEEP FOR SEAT REMOVAL IN
style_designatorPLAIN THREADED
seat_angle_in_deg45.000 MINIMUM AND 60.000 MAXIMUM
nominal_thread_size1.125 INCHES SINGLE THREADED PORTION IN
body_inside_diameter0.750 INCHES NOMINAL IN
seating_surface_shapeANGULAR
thread_quantity_per_inch18 SINGLE THREADED PORTION
thread_series_designatorUNEF SINGLE THREADED PORTION
NSN4820-01-168-5684
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 20266FN5 · 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: 1.000 INCHES NOMINAL SINGLE THREADED PORTION IN
•
THREAD CLASS: 2A SINGLE THREADED PORTION A
•
STYLE DESIGNATOR: PLAIN THREADED
•
MATERIAL: NICKEL ALLOY OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
•
THREAD SERIES DESIGNATOR: UNEF SINGLE THREADED PORTION
•
BODY INSIDE DIAMETER: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH1.000 INCHES NOMINAL SINGLE THREADED PORTION IN
THREAD CLASS2A SINGLE THREADED PORTION A
STYLE DESIGNATORPLAIN THREADED
MATERIALNICKEL ALLOY OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
THREAD SERIES DESIGNATORUNEF SINGLE THREADED PORTION
BODY INSIDE DIAMETER0.750 INCHES NOMINAL IN
SPECIAL FEATURESEND FROM SEATING SURFACE BROACHED TO 0.562 IN. HEX BY 0.250 IN DEEP FOR SEAT REMOVAL IN
SEATING SURFACE SHAPEANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
DKA7410.002.127Interchangeable
interchangeable cross-reference
interchangeable
D-K-A7410-002-127Interchangeable
interchangeable cross-reference
interchangeable
B7410.002.127Interchangeable
interchangeable cross-reference
interchangeable
8551PC2Interchangeable
interchangeable cross-reference
interchangeable
8585PC20Interchangeable
interchangeable cross-reference
interchangeable
A7410.001.127SPCLNInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20266FN5?
20266FN5 is a SEAT,VALVE.
What parts can replace 20266FN5?
There are 24 known substitutes for 20266FN5: DKA7410.002.127, D-K-A7410-002-127, B7410.002.127 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20266FN5?
20266FN5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-168-5684. 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