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Technical Data Sheet
PartsTable / COMPONENT / 6266N
6266N ✓ 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 6266N is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-288-9207, 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
6266N
NSN: 4820-00-288-9207
FSC: 4820
CAGE: K3070 — HENRY TECHNOLOGIES LIMITED (GBR)
SPECIFICATIONS
Part Number6266N
NSN4820-00-288-9207
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 6266N · 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
•
VALVE OPERATION METHOD: MANUAL
•
MATERIAL: COPPER ALLOY 377 SEAT
•
CONNECTION TYPE: UNTHREADED INTERNAL TUBE ALL ENDS
•
MEDIA FOR WHICH DESIGNED: REFRIGERANT 12 FIRST RESPONSE
•
MOUNTING FACILITY: LUG(S)
•
MAXIMUM OPERATING TEMP: 275.0 FAHRENHEIT SINGLE RESPONSE DEGF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-626,ALLOY 377 FED SPEC SINGLE MATERIAL RESPONSE BODY
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.750 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS (FLIS)
VALVE OPERATION METHODMANUAL
MATERIALCOPPER ALLOY 377 SEAT
CONNECTION TYPEUNTHREADED INTERNAL TUBE ALL ENDS
MEDIA FOR WHICH DESIGNEDREFRIGERANT 12 FIRST RESPONSE
MOUNTING FACILITYLUG(S)
MAXIMUM OPERATING TEMP275.0 FAHRENHEIT SINGLE RESPONSE DEGF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626,ALLOY 377 FED SPEC SINGLE MATERIAL RESPONSE BODY
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.750 INCHES ALL ENDS IN
MATERIALCOPPER ALLOY STEM
OPERATING PRESSURE150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
6266Interchangeable
interchangeable cross-reference
interchangeable
20C00001Interchangeable
interchangeable cross-reference
interchangeable
CM2749Interchangeable
interchangeable cross-reference
interchangeable
QQ-A-200/3Interchangeable
interchangeable cross-reference
interchangeable
F591-76Interchangeable
interchangeable cross-reference
interchangeable
F591-73-81PC76Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6266N?
6266N is a 6266N.
What parts can replace 6266N?
There are 18 known substitutes for 6266N: 6266, 20C00001, CM2749 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6266N?
6266N is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-288-9207. 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