Harken 404 16mm Single Block with Ball Bearing

The Harken 404 is a compact, high-performance 16mm single block designed for small synthetic control lines on high-tech dinghies and sailboats. Despite its minimal size and weight, this block delivers exceptional strength-to-weight performance through Harken's innovative engineering.

Key Features:

• Patented ball bearing system with stainless steel balls in a captive, grooved race for smooth operation
• Polished 316 stainless steel top strap for superior corrosion resistance
• 5/8" (16mm) sheave diameter optimized for control line applications
• Accommodates lines up to 7/32" (5mm) diameter
• Maximum working load of 250 lbs (113 kg) with 1200 lb (544 kg) breaking strength
• Ultra-lightweight at just 0.38 oz (11 g)
• Compact 1 1/8" (29mm) length fits tight spaces

This micro block is ideal for applications where weight savings and minimal size are critical, including dinghy mainsheets, control lines, light-duty halyards, and fine-tuning systems. The ball bearing system ensures reliable performance even under load, while the lightweight composite construction keeps weight to an absolute minimum.