Midland Industries 620390 Worm Gear Clamp 22-7/8 in

Product Description

The MIDLAND INDUSTRIES 620390 is a worm gear clamp from the 620 Series, engineered for secure, adjustable clamping in general-purpose piping and hose applications. The clamp features a 1/2 inch wide stainless steel band paired with a stainless steel housing and screw, delivering corrosion resistance across wet, chemical, and outdoor environments. It covers a minimum clamp diameter of 22-7/8 inches and a maximum clamp diameter of 24-7/8 inches, making it well suited for large-diameter hose and pipe assemblies. Actuation is handled by a single 5/16 inch bolt. Plumbers, HVAC technicians, and mechanical contractors use this clamp wherever a reliable, full-perimeter seal is required on oversized connections.

The 620390 is applied in residential and commercial installations where large-diameter flexible hose, ducting, or pipe connections must be clamped and held under sustained pressure or vibration. Typical use cases include large conduit connections, drainage hose assemblies, HVAC duct collars, and general industrial piping tie-ins. The SAE 390 designation confirms it meets standard sizing used across the trades. Its single-bolt worm-drive design allows field adjustment without special tooling, which is practical during installation or periodic maintenance inspections.

Key Features

• Stainless steel band, housing, and screw for full corrosion resistance
• 1/2 inch wide band distributes clamping load evenly around large-diameter connections
• Adjustable range from 22-7/8 inches to 24-7/8 inches clamp diameter
• Single 5/16 inch bolt worm-drive mechanism for simple tightening with a standard screwdriver or nut driver
• SAE 390 designation ensures compatibility with standardized hose and pipe sizing
• Lightweight at 0.3 pounds, minimizing added load on flexible connections

Compatibility

Designed as a general-purpose worm-drive clamp for large-diameter hose and pipe connections requiring a nominal diameter of 22-7/8 inches, consistent with SAE 390 sizing standards used across plumbing, HVAC, and mechanical trade applications.

Installation Notes

Installation is performed by plumbers, HVAC technicians, or mechanical contractors using a standard flat-blade screwdriver or 5/16 inch nut driver. Depressurize and drain any line before removing or replacing clamps. Position the clamp band evenly over the hose or pipe fitting before tightening, and verify the band seats flat without overlap or gap. Do not overtighten to the point of deforming the hose or fitting surface.