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TC109 — SWITCH,THERMOSTATIC

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

TC109: SWITCH,THERMOSTATIC.

The SWITCH,THERMOSTATIC is a the manufacturer industrial component. Key specifications include body_length: 5.875 INCHES NOMINAL IN, overall_width: 3.500 INCHES NOMINAL IN, terminal_type: WIRE LEAD, overall_height: 2.875 INCHES NOMINAL IN, overall_length: 7.000 INCHES NOMINAL IN, first_leg_angle: 90.0 DEGREES NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-925-9779, 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
TC109
NSN: 5340-00-925-9779
NIINs: 009259779, 013546684
FSC: 5340 — Hardware, Commercial
CAGE: 56501 — ABB INSTALLATION PRODUCTS INC (USA)
SPECIFICATIONS
body_length5.875 INCHES NOMINAL IN
overall_width3.500 INCHES NOMINAL IN
terminal_typeWIRE LEAD
overall_height2.875 INCHES NOMINAL IN
overall_length7.000 INCHES NOMINAL IN
first_leg_angle90.0 DEGREES NOMINAL
first_leg_width0.438 INCHES NOMINAL IN
mounting_methodBRACKET(S) AND UNTHREADED HOLE(S)
first_leg_length0.438 INCHES NOMINAL IN
second_leg_styleEND RADIUS
second_leg_width0.438 INCHES NOMINAL IN
special_featuresWEAPON SYSTEM ESSENTIAL
NSN5340-00-925-9779
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: TC109 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SECOND LEG DISTANCE FROM EDGE TO HOLE CENTER ALONG LENGTH: 0.281 INCHES NOMINAL IN
•
FIRST LEG DISTANCE FROM EDGE TO HOLE CENTER ALONG LENGTH: 0.281 INCHES NOMINAL IN
•
FIRST LEG HOLE DIAMETER: 0.090 INCHES NOMINAL IN
•
FIRST LEG ANGLE: 90.0 DEGREES NOMINAL
•
FIRST LEG DISTANCE BETWEEN HOLE CENTERS ALONG WIDTH: 0.281 INCHES NOMINAL IN
•
SECOND LEG HOLE DIAMETER: 0.090 INCHES NOMINAL IN
•
SECOND LEG WIDTH: 0.438 INCHES NOMINAL IN
•
SECOND LEG LENGTH: 0.547 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SECOND LEG DISTANCE FROM EDGE TO HOLE CENTER ALONG LENGTH0.281 INCHES NOMINAL IN
FIRST LEG DISTANCE FROM EDGE TO HOLE CENTER ALONG LENGTH0.281 INCHES NOMINAL IN
FIRST LEG HOLE DIAMETER0.090 INCHES NOMINAL IN
FIRST LEG ANGLE90.0 DEGREES NOMINAL
FIRST LEG DISTANCE BETWEEN HOLE CENTERS ALONG WIDTH0.281 INCHES NOMINAL IN
SECOND LEG HOLE DIAMETER0.090 INCHES NOMINAL IN
SECOND LEG WIDTH0.438 INCHES NOMINAL IN
SECOND LEG LENGTH0.547 INCHES NOMINAL IN
SECOND LEG DISTANCE FROM EDGE TO HOLE CENTER ALONG WIDTH0.141 INCHES NOMINAL IN
SECOND LEG THICKNESS0.062 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
GB850C1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is TC109?
TC109 is a SWITCH,THERMOSTATIC.
What parts can replace TC109?
There is 1 known substitute for TC109: GB850C1. Substitute compatibility should be verified for your specific system.
What is the NSN for TC109?
TC109 is cataloged in the U.S. Government catalog under NSN 5340-00-925-9779. 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.