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PartsTable / COMPONENT / 40103-50002-45
40103-50002-45 ✓ 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,REGULATING,TEMPERATURE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY STEM, body_style: STRAIGHT THRU, bulb_length: 12.500 INCHES NOMINAL IN, temp_rating: 65.0 FAHRENHEIT MINIMUM AND 95.0 FAHRENHEIT MAXIMUM DEGF, bulb_diameter: 1.125 INCHES NOMINAL IN, temp_adjustability: ADJUSTABLE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-166-5376, 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
40103-50002-45
NSN: 4820-01-166-5376
FSC: 4820
CAGE: 55378 — TRAC REGULATOR CO., INC. DBA TRAC REGULATOR CO INC (USA)
SPECIFICATIONS
materialNICKEL ALLOY STEM
body_styleSTRAIGHT THRU
bulb_length12.500 INCHES NOMINAL IN
temp_rating65.0 FAHRENHEIT MINIMUM AND 95.0 FAHRENHEIT MAXIMUM DEGF
bulb_diameter1.125 INCHES NOMINAL IN
temp_adjustabilityADJUSTABLE
flow_control_deviceSTEM AND INTEGRAL DISK
thermostatic_elementLIQUID IMMERSION TYPE
capillary_tube_length96.000 INCHES NOMINAL IN
end_connection_quantity2
first_end_connection_typeUNTHREADED INTERNAL PIPE
first_end_style_designatorSTREAMLINED WITH ONE BRAZING RING
NSN4820-01-166-5376
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 40103-50002-45 · 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
•
MATERIAL: NICKEL ALLOY BULB
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE
•
SUPPLEMENTARY FEATURES: THIS ITEM HAS BEEN REVIEWED FOR ASBESTOS MATERIAL. THE CURRENT APPROVED SOURCE, 55378, HAS INDICATED THEIR PART NUMBER CONTAINED ASBESTOS PRIOR TO 1984. THEY CONTINUE TO MANUFACTURE THE SAME PART NUMBER WITHOUT ASBESTOS MATERIAL AFTER 1984
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALNICKEL ALLOY BULB
MATERIALNICKEL ALLOY FLOW CONTROL DEVICE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE
MATERIALCOPPER ALLOY BODY
MATERIALNICKEL ALLOY SEAT
SUPPLEMENTARY FEATURESTHIS ITEM HAS BEEN REVIEWED FOR ASBESTOS MATERIAL. THE CURRENT APPROVED SOURCE, 55378, HAS INDICATED THEIR PART NUMBER CONTAINED ASBESTOS PRIOR TO 1984. THEY CONTINUE TO MANUFACTURE THE SAME PART NUMBER WITHOUT ASBESTOS MATERIAL AFTER 1984
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE SEAT
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE STEM
MATERIALNICKEL ALLOY STEM
FIRST END STYLE DESIGNATORSTREAMLINED WITH ONE BRAZING RING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
SMN100WAInterchangeable
interchangeable cross-reference
interchangeable
4010-3Interchangeable
interchangeable cross-reference
interchangeable
SMN100KAInterchangeable
interchangeable cross-reference
interchangeable
9430273Interchangeable
interchangeable cross-reference
interchangeable
PD1202Interchangeable
interchangeable cross-reference
interchangeable
R64000-24Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 40103-50002-45?
40103-50002-45 is a VALVE,REGULATING,TEMPERATURE.
What parts can replace 40103-50002-45?
There are 19 known substitutes for 40103-50002-45: SMN100WA, 4010-3, SMN100KA and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 40103-50002-45?
40103-50002-45 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-166-5376. 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