Oetiker 16705989-100 Ear Clamp 1-5/8 in Stainless

Product Description

The OETIKER 16705989-100 is a single-ear stepless clamp designed for secure, permanent hose and tubing connections in fluid and air handling systems. The ear clamp works by deforming a single ear section when crimped, applying uniform 360-degree compression around the hose. With a 1-5/8-inch nominal size, 7 mm band width, and 0.6 mm band thickness, this clamp provides a low-profile, vibration-resistant seal. Constructed from stainless steel, it resists corrosion in wet, chemical-exposed, and outdoor environments. HVAC technicians, plumbers, and refrigeration mechanics install these clamps where worm-gear or spring clamps are not acceptable and a tamper-evident, leak-free connection is required.

Ear clamps in this size range are commonly used on heater hose connections, coolant bypass lines, PEX tubing fittings, low-pressure pneumatic lines, and flexible duct collars. The 1-5/8-inch nominal diameter suits a wide range of standard hose and tubing found in residential and light commercial HVAC systems, plumbing rough-in work, and hydronic heating installations. These clamps are installed using a dedicated ear clamp pincer tool or compatible crimping pliers and are not intended for repositioning after crimping.

Key Features

• 1-5/8-inch nominal clamp size for precise fitment on standard hose and tubing
• Single-ear design provides uniform 360-degree compression when crimped
• Stainless steel construction resists corrosion in wet and chemically exposed environments
• 7 mm band width and 0.6 mm band thickness for a low-profile installation footprint
• 10 mm inner ear width supports consistent crimp engagement with standard pincer tooling
• Permanent, tamper-evident seal once installed — not reusable after crimping

Compatibility

Designed as an OEM-style replacement or new-installation ear clamp for standard 1-5/8-inch hose and tubing connections in HVAC, plumbing, and hydronic systems.

Installation Notes

Installation requires a dedicated ear clamp pincer tool or calibrated crimping pliers rated for the clamp ear width — do not use slip-joint or tongue-and-groove pliers as a substitute. Shut off fluid flow and depressurize the line before installing or inspecting clamps on pressurized systems. Once crimped, the clamp is permanently deformed and must be cut off for removal — plan for single-use application. Follow applicable plumbing and mechanical codes, including IPC and IMC guidelines, for hose connection requirements in the system being serviced.