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Stepless Spring Clamp For Thermal Cycle Applications, 2.9375 - 3.3125 Inch Clamping Range, 0.35 Inch Width

Description & Features

Constructed entirely from 300 AISI series stainless steel, this clamp is engineered for demanding thermal cycle environments where hoses are subject to repeated expansion, contraction, and vibration. The tongue-in-groove design ensures a complete 360° seal around the hose, while the integrated spring automatically compensates for dimensional changes without manual adjustment. Its low installation torque requirement helps protect delicate silicone hoses from stress or damage during fitting.

The Stepless Spring Clamp For Thermal Cycle Applications, 2.9375 - 3.3125 Inch Clamping Range, 0.35 Inch Width is suited for use on radiators, thermostat-to-water-pump connections, water pump-to-oil cooler lines, and heater hose assemblies. The clamp is self-tightening, lightweight, adjustable, and fully reusable. Installation involves compressing the spring fully, then advancing three additional full revolutions to achieve the recommended torque range of 12–18 lb-in, confirmed by a visible gap of at least 1/8 inch between the two D-Nuts. The catalog number for this clamp is C1EW20, supplied by Oetiker Inc.

SKU: 17800185

Supplier Part Number (MPN): 17800185

Alternate Part Numbers: C1EW20, MI-03215065, MINO-00691X50025

Specifications

Clamping Range (in) 2.9375 - 3.3125	Brand Oetiker Inc.	Brand Oetiker	Pack Size 1.00	UOM EA	Supplier Part Number 17800185	Torque Rating 12-18 lb-in	Torque Rating 12-18 lb-in	Product Weight 0.06 lbs	Alternate Part Numbers Alternate Part Number C1EW20, Alternate Part Number MI-03215065, Alternate Part Number MINO-00691X50025

Similar Products

Model Number	Clamping Range (in)	Torque Rating	Width (in)
17800178 Stepless Spring Clamp	1.6875 - 1.9375	12-18 lb-in	0.35
17800182 Stepless Spring Clamp	2.375 - 2.75	12-18 lb-in	0.35
17800184 Stepless Spring Clamp	2.75 - 3.125	12-18 lb-in	0.35
17800185 Stepless Spring Clamp	2.9375 - 3.3125	12-18 lb-in	0.35
17800186 Stepless Spring Clamp	3.125 - 3.50	12-18 lb-in	0.35

Product Questions & Answers (3)

Question by: Steve C on Jun 21, 2025, 7:39 AM

Will this spring clamp work on a radiator hose where it connects to the engine block?

Answer by: Customer Support on Jun 22, 2025, 9:20 AM

These stepless spring clamps are indeed used for radiator hoses connecting to engine blocks, as well as thermostat housings to water pumps, and water pumps to oil coolers.

Question by: Brett M on Dec 22, 2025, 12:16 PM

got a radiator hose that measures right around 3 inches, is this clamp gonna cover that or am i too close to the edge

Answer by: Customer Support on Dec 23, 2025, 7:18 PM

Fit comes down to the clamping range, and this one spans 2.9375 to 3.3125 inches. If your hose outside diameter at the clamp point is around 3 inches, that falls inside the range.

Question by: Curt W on Oct 28, 2025, 8:45 AM

does this clamp work on silicone hoses or is it gonna crack em down if you overtighten?

Answer by: Customer Support on Oct 29, 2025, 5:50 PM

Silicone hoses are actually where this clamp shines. The torque requirement runs between 12 and 18 lb-in, which is on the lower end compared to a lot of band clamps. That low installation torque is specifically what keeps silicone from getting stressed or distorted during tightening. The spring also keeps constant pressure against the hose as it expands and contracts with heat cycles, so you're not dealing with a clamp that goes slack and lets coolant weep out.