The Barton Size 5 54mm plain-bearing double swivel block with becket provides high-strength, corrosion-resistant rope control for larger cruising and racing yachts. Its primary benefit is a 316 stainless steel load frame and interior that maintain structural integrity in marine environments while delivering a rated safe working load.

If your rigging needs durable, low-maintenance sheaves that tolerate grit and saltwater exposure, this plain-bearing block solves that problem by using a simple, robust bearing design and reinforced side plates to reduce service intervals and failure points.

• 54mm x 17mm sheave designed for rope up to 12mm (7/16")
• Marine-grade 316 stainless steel load-carrying components and interior frame
• High-strength moulded side plates through-bolted and riveted for added security
• SWL 750kg (1650lbs) and break load 1500kg (3300lbs) for defined safety margins
• Double sheave with swivel head and becket for multiple lead and attachment options

Compared to ball-bearing versions this plain-bearing block has a lower maximum rolling load but offers simpler maintenance and greater tolerance to debris and sustained load conditions. You can use it on mainsheets, halyards, control lines, or traveller systems where strength and corrosion resistance matter.

Made by Barton Marine part number N05231, weight 312 g and dimensions 155 × 59 × 58 mm. Compatible with Barton ball-bearing mainsheet traveller components and standard yacht fittings. Verify your rigging requirements before installation and consult product specs for safe use. Learn more today.