PartsTable
Technical Data Sheet
128SCH136-3 ✓ 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 RELAY,ELECTROMAGNETIC is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_class: 3B FIRST END, connection_type: THREADED INTERNAL BOSS FIRST END, connection_style: GASKET SEAL(BOSS) FIRST END, style_designator: STRAIGHT THRU, thread_direction: RIGHT-HAND FIRST END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-504-8590, 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
128SCH136-3
NSN: 4820-00-504-8590
FSC: 4820
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_class3B FIRST END
connection_typeTHREADED INTERNAL BOSS FIRST END
connection_styleGASKET SEAL(BOSS) FIRST END
style_designatorSTRAIGHT THRU
thread_directionRIGHT-HAND FIRST END
flow_control_devicePOPPET
nominal_thread_size0.562 INCHES FIRST END IN
valve_operation_methodAUTOMATIC
thread_quantity_per_inch18 FIRST END
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
nominal_outside_diameter_tube_accommodated0.375 INCHES FIRST END IN
NSN4820-00-504-8590
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 128SCH136-3 · 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
NOMINAL THREAD SIZE: 0.562 INCHES FIRST END IN
FLOW CONTROL DEVICE: POPPET
THREAD CLASS: 3B FIRST END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.375 INCHES FIRST END IN
VALVE OPERATION METHOD: AUTOMATIC
CONNECTION STYLE: GASKET SEAL(BOSS) FIRST END
CONNECTION TYPE: THREADED INTERNAL BOSS FIRST END
STYLE DESIGNATOR: STRAIGHT THRU
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE0.562 INCHES FIRST END IN
FLOW CONTROL DEVICEPOPPET
THREAD CLASS3B FIRST END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.375 INCHES FIRST END IN
VALVE OPERATION METHODAUTOMATIC
CONNECTION STYLEGASKET SEAL(BOSS) FIRST END
CONNECTION TYPETHREADED INTERNAL BOSS FIRST END
STYLE DESIGNATORSTRAIGHT THRU
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
THREAD QUANTITY PER INCH18 FIRST END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
0745231265Interchangeable
interchangeable cross-reference
interchangeable
BACS21X4Interchangeable
interchangeable cross-reference
interchangeable
A72498Interchangeable
interchangeable cross-reference
interchangeable
5431Interchangeable
interchangeable cross-reference
interchangeable
41DB30AGInterchangeable
interchangeable cross-reference
interchangeable
41NB30AGMInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 128SCH136-3?
128SCH136-3 is a RELAY,ELECTROMAGNETIC.
What parts can replace 128SCH136-3?
There are 7 known substitutes for 128SCH136-3: 0745231265, BACS21X4, A72498 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 128SCH136-3?
128SCH136-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-504-8590. This indicates validated use in U.S. government and defense supply chains.
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