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Technical Data Sheet
PartsTable / COMPONENT / 255757ASSYBT
255757ASSYBT ✓ 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 VALVE,BALL is a the manufacturer industrial component. Key specifications include material: PLASTIC ACETAL SEAT, flange_shape: ROUND WITH HOLES ALL ENDS, connection_type: FLANGE ALL ENDS, style_designator: STRAIGHT THRU, nominal_thickness: 0.812 INCHES ALL ENDS IN, bolt_hole_quantity: 6 ALL 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 4820-01-145-1862, 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
255757ASSYBT
NSN: 4820-01-145-1862
FSC: 4820
CAGE: 53154 — PORTLAND VALVE LLC (USA)
SPECIFICATIONS
materialPLASTIC ACETAL SEAT
flange_shapeROUND WITH HOLES ALL ENDS
connection_typeFLANGE ALL ENDS
style_designatorSTRAIGHT THRU
nominal_thickness0.812 INCHES ALL ENDS IN
bolt_hole_quantity6 ALL ENDS
flange_face_designPLAIN ALL ENDS
valve_operation_methodMANUAL
nominal_outside_diameter5.062 INCHES ALL ENDS IN
bolt_hole_nominal_diameter0.562 INCHES ALL ENDS IN
bolt_circle_nominal_diameter3.938 INCHES ALL ENDS IN
material_document_and_classificationMIL-C-20159 MIL SPEC SINGLE MATERIAL RESPONSE BODY
NSN4820-01-145-1862
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 255757ASSYBT · 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
•
FLANGE FACE DESIGN: PLAIN ALL ENDS
•
MATERIAL: TITANIUM FLOW CONTROL DEVICE
•
VALVE OPERATION METHOD: MANUAL
•
NOMINAL OUTSIDE DIAMETER: 5.062 INCHES ALL ENDS IN
•
CONNECTION TYPE: FLANGE ALL ENDS
•
BOLT HOLE QUANTITY: 6 ALL ENDS
•
FLANGE SHAPE: ROUND WITH HOLES ALL ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-C-20159 MIL SPEC SINGLE MATERIAL RESPONSE BODY
TECHNICAL CHARACTERISTICS (FLIS)
FLANGE FACE DESIGNPLAIN ALL ENDS
MATERIALTITANIUM FLOW CONTROL DEVICE
VALVE OPERATION METHODMANUAL
NOMINAL OUTSIDE DIAMETER5.062 INCHES ALL ENDS IN
CONNECTION TYPEFLANGE ALL ENDS
BOLT HOLE QUANTITY6 ALL ENDS
FLANGE SHAPEROUND WITH HOLES ALL ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-20159 MIL SPEC SINGLE MATERIAL RESPONSE BODY
BOLT CIRCLE NOMINAL DIAMETER3.938 INCHES ALL ENDS IN
BOLT HOLE NOMINAL DIAMETER0.562 INCHES ALL ENDS IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
255757Interchangeable
interchangeable cross-reference
interchangeable
W0367-006CADPInterchangeable
interchangeable cross-reference
interchangeable
W0367-006Interchangeable
interchangeable cross-reference
interchangeable
255757PIECE8Interchangeable
interchangeable cross-reference
interchangeable
255757ASSYCT PIECE9Interchangeable
interchangeable cross-reference
interchangeable
255757 ASSEMBLY ATInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 255757ASSYBT?
255757ASSYBT is a VALVE,BALL.
What parts can replace 255757ASSYBT?
There are 7 known substitutes for 255757ASSYBT: 255757, W0367-006CADP, W0367-006 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 255757ASSYBT?
255757ASSYBT is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-145-1862. 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