Sierra 18-720-4000 Marine Exhaust Hose T-Bolt Band Clamp 4 Inch

The Sierra 18-720-4000 is a marine-grade T-bolt band clamp engineered for secure, corrosion-resistant clamping of 4-inch ID exhaust hose. Designed specifically for use with Shields Series 200 and 250 marine exhaust hose, this clamp is built for demanding below-waterline applications where a reliable, watertight seal is critical.

The band is constructed from 316 stainless steel (.025 in. thick × .75 in. wide), offering superior resistance to rust and saltwater corrosion. The T-bolt hardware—including the extra-long 1/4 in. bolt, nylon insert locknut, and trunnion—is fabricated from 18-8 (304) stainless steel for added strength and durability.

Key Features:

• Fits 4 in. ID hose — clamping diameter range: 4.18 in. to 4.84 in. (106.2 mm to 122.9 mm)
• 316 stainless steel band — .025 in. thick × .75 in. wide
• Hardware (bolt, nut, trunnion) in 18-8 (304) stainless steel
• Includes extra-long 1/4 in. bolt and nylon insert locknut
• Maximum torque: 75 inch-pounds
• Designed for Shields Series 200 & 250 marine exhaust hose
• Rated for below-waterline applications
• Sold individually

The Sierra 18-720-4000 T-bolt band clamp delivers the clamping force and corrosion resistance required for professional-grade marine exhaust installations. UPC: 030999572554.