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PartsTable / COMPONENT / 1146M1 1-4IN
1146M1 1-4IN ✓ 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,GATE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY BODY, stem_type: NONRISING, valve_size: 1.250 INCHES IN, bonnet_type: INSIDE SCREW, connection_type: BRAZING, PIPE, valve_operation_method: MANUAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-314-2170, 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
1146M1 1-4IN
NSN: 4820-01-314-2170
FSC: 4820
CAGE: 76364 — MILWAUKEE VALVE CO, INC DIV MILWAUKEE VALVE COMPANY, LLC (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
stem_typeNONRISING
valve_size1.250 INCHES IN
bonnet_typeINSIDE SCREW
connection_typeBRAZING, PIPE
valve_operation_methodMANUAL
bonnet_attachment_methodTHREADED
operating_pressure_and_type200.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 400.0 POUNDS PER SQUARE INCH (PSI) WATER AND OTHER LIQUIDS MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
inlet_relationship_with_outletIDENTICAL
nominal_pipe_size_accommodated1.250 INCHES IN
material_document_and_classificationASTM-B61 ASSN STD SINGLE MATERIAL RESPONSE BODY
maximum_operating_temp_and_media_for_which_designed425.0 FAHRENHEIT STEAM AND 150.0 FAHRENHEIT WATER-OIL-GAS DEGF
NSN4820-01-314-2170
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1146M1 1-4IN · 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 PIPE SIZE ACCOMMODATED: 1.250 INCHES IN
•
BONNET ATTACHMENT METHOD: THREADED
•
VALVE OPERATION METHOD: MANUAL
•
VALVE SIZE: 1.250 INCHES IN
•
OPERATING PRESSURE AND TYPE: 200.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 400.0 POUNDS PER SQUARE INCH (PSI) WATER AND OTHER LIQUIDS MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
•
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED: 425.0 FAHRENHEIT STEAM AND 150.0 FAHRENHEIT WATER-OIL-GAS DEGF
•
BONNET TYPE: INSIDE SCREW
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM-B164 ASSN STD SINGLE MATERIAL RESPONSE SEAT
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL PIPE SIZE ACCOMMODATED1.250 INCHES IN
BONNET ATTACHMENT METHODTHREADED
VALVE OPERATION METHODMANUAL
VALVE SIZE1.250 INCHES IN
OPERATING PRESSURE AND TYPE200.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 400.0 POUNDS PER SQUARE INCH (PSI) WATER AND OTHER LIQUIDS MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED425.0 FAHRENHEIT STEAM AND 150.0 FAHRENHEIT WATER-OIL-GAS DEGF
BONNET TYPEINSIDE SCREW
MATERIAL DOCUMENT AND CLASSIFICATIONASTM-B164 ASSN STD SINGLE MATERIAL RESPONSE SEAT
MATERIALNICKEL ALLOY DISK
MATERIALCOPPER ALLOY BODY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
803-1385714Interchangeable
interchangeable cross-reference
interchangeable
803-1385714-5XAFInterchangeable
interchangeable cross-reference
interchangeable
803-1385714-51Interchangeable
interchangeable cross-reference
interchangeable
1146-M PC6 PART 4335-FInterchangeable
interchangeable cross-reference
interchangeable
4337-F-183Interchangeable
interchangeable cross-reference
interchangeable
1146-MInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1146M1 1-4IN?
1146M1 1-4IN is a VALVE,GATE.
What parts can replace 1146M1 1-4IN?
There are 11 known substitutes for 1146M1 1-4IN: 803-1385714, 803-1385714-5XAF, 803-1385714-51 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1146M1 1-4IN?
1146M1 1-4IN is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-314-2170. 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