PartsTable
Technical Data Sheet
20263B51SS ✓ 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: STEEL COMP 303 STEM, valve_size: 0.500 INCHES IN, bonnet_type: INSIDE SPRING, flange_shape: ROUND WITH HOLES ALL ENDS, connection_type: FLANGE ALL ENDS, style_designator: ANGLE FLANGED ENDS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-050-9075, 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
20263B51SS
NSN: 4820-01-050-9075
FSC: 4820
CAGE: 01343 — ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY (USA)
SPECIFICATIONS
materialSTEEL COMP 303 STEM
valve_size0.500 INCHES IN
bonnet_typeINSIDE SPRING
flange_shapeROUND WITH HOLES ALL ENDS
connection_typeFLANGE ALL ENDS
style_designatorANGLE FLANGED ENDS
nominal_thickness0.440 INCHES ALL ENDS IN
bolt_hole_quantity4 ALL ENDS
flange_face_designRAISED STRAIGHT ALL ENDS
operating_pressure150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
disk_loading_methodSPRING
flow_control_deviceDISK
NSN4820-01-050-9075
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 20263B51SS · 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
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764,COMP 303-CANCELED FED SPEC SINGLE MATERIAL RESPONSE STEM
RAISED FACE NOMINAL DIAMETER: 1.375 INCHES ALL ENDS IN
BOLT HOLE QUANTITY: 4 ALL ENDS
VALVE SIZE: 0.500 INCHES IN
ADJUSTABLE PRESSURE RANGE: +15.0 TO 19.0 POUNDS PER SQUARE INCH LBS
MATERIAL: STEEL COMP 303 FLOW CONTROL DEVICE
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764,COMP 303-CANCELED FED SPEC SINGLE MATERIAL RESPONSE STEM
RAISED FACE NOMINAL DIAMETER1.375 INCHES ALL ENDS IN
BOLT HOLE QUANTITY4 ALL ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A216,GRADE WCB ASSN STD SINGLE MATERIAL RESPONSE BODY
VALVE SIZE0.500 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764,COMP 303-CANCELED FED SPEC SINGLE MATERIAL RESPONSE SEAT
ADJUSTABLE PRESSURE RANGE+15.0 TO 19.0 POUNDS PER SQUARE INCH LBS
MATERIALSTEEL COMP 303 FLOW CONTROL DEVICE
MATERIALSTEEL COMP 303 SEAT
MAXIMUM OPERATING TEMP450.0 FAHRENHEIT SINGLE RESPONSE DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
20263Interchangeable
interchangeable cross-reference
interchangeable
26-190-16SInterchangeable
interchangeable cross-reference
interchangeable
26-190-16Interchangeable
interchangeable cross-reference
interchangeable
1-910072-001Interchangeable
interchangeable cross-reference
interchangeable
HD-1-54C93Interchangeable
interchangeable cross-reference
interchangeable
MM54C93JInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20263B51SS?
20263B51SS is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace 20263B51SS?
There are 14 known substitutes for 20263B51SS: 20263, 26-190-16S, 26-190-16 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20263B51SS?
20263B51SS is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-050-9075. This indicates validated use in U.S. government and defense supply chains.
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