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Technical Data Sheet

A-3257-1/2X1IN — Technical Data Sheet

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— · 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

DRIVE,ENGINE,ELECTRICAL STARTER. Key specifications include special_features: THIS IS 9/16-18, SELF LOCKING HEXNUT.THIS IS 9/16-18, SELF LOCKING HEXNUT., thread_direction: RIGHT-HANDRIGHT-HAND, surface_treatment: CADMIUM OVERALL, part_name_assigned_by_controlling_agency: PROPELLER, SELF LOCKING HEX NUTPROPELLER, SELF LOCKING HEX NUT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4820-01-244-7637, 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
A-3257-1/2X1IN
NSN: 4820-01-244-7637
FSC: 4820
CAGE: 75954 — KUNKLE INDUSTRIES INC LONERGAN VALVE DIV (USA)
SPECIFICATIONS
special_featuresTHIS IS 9/16-18, SELF LOCKING HEXNUT.THIS IS 9/16-18, SELF LOCKING HEXNUT.
thread_directionRIGHT-HANDRIGHT-HAND
surface_treatmentCADMIUM OVERALL
part_name_assigned_by_controlling_agencyPROPELLER, SELF LOCKING HEX NUTPROPELLER, SELF LOCKING HEX NUT
NSN4820-01-244-7637
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: A-3257-1/2X1IN · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
C1AZ-11350-AInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
ICM113400InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2043-2017InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
A-3257PC4-1/2X1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
A-3257 PIECE 4InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
A-3257InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A-3257-1/2X1IN?
A-3257-1/2X1IN is a DRIVE,ENGINE,ELECTRICAL STARTER.
What parts can replace A-3257-1/2X1IN?
There are 14 known substitutes for A-3257-1/2X1IN: C1AZ-11350-A, ICM113400, 2043-2017 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A-3257-1/2X1IN?
A-3257-1/2X1IN is cataloged in the Federal Logistics Information System under NSN 4820-01-244-7637. This indicates validated use in U.S. government and defense supply chains.
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