Hose Clamps
T-H Marine 15500009 Oetiker Hose Clamps 11/16 Inch Single Ear Stainless Steel (100 Pack)
T-H Marine 18500000 Oetiker Stainless Steel Stepless Ear Clamp Kit with Crimping Tool 150-Piece
T-H Marine 15500008 Oetiker Hose Clamps 5/8 Inch Single Ear Stainless Steel (100 Pack)
What Are Hose Clamps and Why Do They Matter?
Hose clamps are one of the most fundamental—and most overlooked—fastening components in any fluid system. Whether you're securing a coolant hose on a heavy-duty truck, clamping a fuel line under the hood, or making a watertight connection in a plumbing assembly, a quality hose clamp is the last line of defense against leaks, pressure loss, and system failure. Get the clamp wrong, and a small drip can quickly become a costly repair.
These compact devices work by applying radial compression force around the outside of a hose where it meets a barb, fitting, or nipple. The goal is a uniform, airtight or watertight seal that holds firm under vibration, heat cycling, and pressure fluctuation—conditions that are standard in automotive cooling systems, marine plumbing, hydraulic lines, and industrial applications alike.
Types of Hose Clamps to Know
- Worm-drive (screw) clamps – The most common type, featuring a slotted stainless steel band tightened with a hex or slotted screw. Ideal for service and repair because they're infinitely adjustable.
- Spring/constant-tension clamps – Designed to automatically compensate for hose expansion and contraction due to heat cycles, making them popular in OEM cooling system applications.
- Ear (pinch) clamps – Single-use crimped clamps that provide a clean, tamper-evident seal. Widely used in factory assembly and precision fluid connections.
- T-bolt clamps – Heavy-duty option for high-vibration and large-diameter applications such as turbocharger and intercooler hose connections.
How to Choose the Right Hose Clamp
Selecting the correct clamp involves more than just matching the diameter. You'll need to consider the hose material (rubber, silicone, or thermoplastic all behave differently under clamping force), the operating pressure, temperature range, and the environment — a marine or underhood application demands corrosion-resistant stainless steel, while a low-pressure plumbing line may accept carbon steel. When in doubt, always err toward a wider band and a higher-grade material; the marginal cost difference is negligible compared to the cost of a failed seal.
Top Hose Clamp Brands
Gates is a globally recognized name in fluid power and hose management. Gates hose clamps are engineered to meet or exceed SAE requirements and are designed for optimal compatibility with Gates hose assemblies. Their lineup spans everything from the Green Stripe™ Silicone Hose Clamp—which features a special inner liner to prevent hose cover extrusion on soft silicone hoses—to constant-tension spring clamps and the innovative PowerGrip™ SB heat-shrinkable clamp that self-tightens with a standard heat gun.
Oetiker is the originator of the StepLess® ear clamp, a design first introduced in 1979 that remains the benchmark for precision crimped connections. Oetiker hose clamps use a patented tongue-in-groove construction that eliminates any steps or overlaps on the inner circumference of the clamp, delivering a continuous 360° radial clamping force with no leak paths. Their clamps are the go-to choice in automotive, industrial, and marine applications where a factory-tight, tamper-evident seal is required.