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1146M — VALVE,GATE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

1146M: VALVE,GATE.

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 U.S. Government catalog 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
1146M
NSN: 4820-00-184-9108
NIINs: 001849108, 011186234, 011993147, 013142170, 014561151, 015390925
FSC: 4820 — Valves, Nonpowered
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: 1146M · 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
•
INLET RELATIONSHIP WITH OUTLET: IDENTICAL
•
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED: 425.0 FAHRENHEIT STEAM AND 150.0 FAHRENHEIT WATER-OIL-GAS DEGF
•
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
•
STEM TYPE: NONRISING
•
CONNECTION TYPE: THREADED EXTERNAL TUBE
•
VALVE SIZE: 1.000 INCHES IN
•
FEATURES PROVIDED: BONNET PACKING
•
BONNET TYPE: INSIDE SCREW
TECHNICAL CHARACTERISTICS
INLET RELATIONSHIP WITH OUTLETIDENTICAL
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED425.0 FAHRENHEIT STEAM AND 150.0 FAHRENHEIT WATER-OIL-GAS DEGF
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
STEM TYPENONRISING
CONNECTION TYPETHREADED EXTERNAL TUBE
VALVE SIZE1.000 INCHES IN
FEATURES PROVIDEDBONNET PACKING
BONNET TYPEINSIDE SCREW
NOMINAL THREAD SIZE1.438 INCHES IN
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
SUBSTITUTES & CROSS-REFERENCES 7
803-1385714Reference document
Same NSN cross-reference
Reference document — Secondary reference
803-1385714-51Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
376M0D1 INReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
803-1385714-52Reference document
Same NSN cross-reference
Reference document — Secondary reference
4820PL1341206Reference document
Same NSN cross-reference
Reference document — Informative reference only
803-1385714-11-51Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1146M?
1146M is a VALVE,GATE.
What parts can replace 1146M?
There are 7 known substitutes for 1146M: 803-1385714, 803-1385714-51, 376M0D1 IN and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1146M?
1146M is cataloged in the U.S. Government catalog under NSN 4820-00-184-9108. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.