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Technical Data Sheet
PartsTable / COMPONENT / 1146-M
1146-M ✓ 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: NICKEL ALLOY 400 STEM, stem_type: NONRISING, valve_size: 0.500 INCHES IN, bonnet_type: INSIDE SCREW, connection_type: SOLDER, TUBE, special_features: THE"M" IN THE PART NO. INDICATES NO O-RING REQUIRED.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-184-9108, 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
1146-M
NSN: 4820-00-184-9108
FSC: 4820
CAGE: 76364 — MILWAUKEE VALVE CO, INC DIV MILWAUKEE VALVE COMPANY, LLC (USA)
SPECIFICATIONS
materialNICKEL ALLOY 400 STEM
stem_typeNONRISING
valve_size0.500 INCHES IN
bonnet_typeINSIDE SCREW
connection_typeSOLDER, TUBE
special_featuresTHE"M" IN THE PART NO. INDICATES NO O-RING REQUIRED
valve_operation_methodMANUAL
end_item_identificationWEAPON CODE TH; STRATEGIC SEALIFT CONVERSION SHIPS CLASS
operating_pressure_and_type200.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 400.0 POUNDS PER SQUARE INCH (PSI) AIR MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
inlet_relationship_with_outletIDENTICAL
nominal_outside_diameter_tube_accommodated0.500 INCHES IN
maximum_operating_temp_and_media_for_which_designed425.0 FAHRENHEIT STEAM DEGF
NSN4820-00-184-9108
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1146-M · 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
•
THREAD QUANTITY PER INCH: 20
•
BONNET ATTACHMENT METHOD: THREADED
•
FEATURES PROVIDED: BONNET PACKING
•
TEST DATA DOCUMENT: 03950-882047488 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
•
MATERIAL: NICKEL ALLOY SEAT
•
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED: 425.0 FAHRENHEIT STEAM AND 150.0 FAHRENHEIT WATER-OIL-GAS DEGF
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH20
BONNET ATTACHMENT METHODTHREADED
THREAD QUANTITY PER INCH20
SPECIAL FEATURESEACH VALVE SHALL HAVE THREE BUNA-N O RINGS PACKED IN A BAG AND SECURELY ATTACHED W/INSTRUCTIONS,O RINGS FOR OIL SERVICE ONLY
FEATURES PROVIDEDBONNET PACKING
TEST DATA DOCUMENT03950-882047488 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
MATERIALNICKEL ALLOY SEAT
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED425.0 FAHRENHEIT STEAM AND 150.0 FAHRENHEIT WATER-OIL-GAS DEGF
INLET RELATIONSHIP WITH OUTLETIDENTICAL
NOMINAL THREAD SIZE1.438 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
1146-M PC6 PART 4335-FInterchangeable
interchangeable cross-reference
interchangeable
4337-F-183Interchangeable
interchangeable cross-reference
interchangeable
1146-MInterchangeable
interchangeable cross-reference
interchangeable
86161-J2-940Interchangeable
interchangeable cross-reference
interchangeable
4335-JP-180Interchangeable
interchangeable cross-reference
interchangeable
1146M1 1-4INInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1146-M?
1146-M is a VALVE,GATE.
What parts can replace 1146-M?
There are 17 known substitutes for 1146-M: 1146-M PC6 PART 4335-F, 4337-F-183, 1146-M and 14 more. Substitute compatibility should be verified for your specific system.
Is 1146-M still available?
1146-M is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026