Barton Size 4 58mm Plain Bearing Pulley Upright Block

Barton Size 4 58mm Plain Bearing Pulley Upright Block is engineered for serious sailors who demand rugged reliability and smooth performance from their rigging. Featuring a generous 58mm (2 5/16") sheave, this Size 4 block handles larger lines with ease, delivering precise control and reduced wear on sheets during cruising or racing adventures.

Key features

• 58mm (2 5/16") sheave for efficient line handling and reduced friction
• Rugged construction with high-grade molded side plates that are through-bolted and riveted for enhanced strength and security
• Marine-grade 316 stainless steel load-bearing components and interior frame for superior corrosion resistance
• Plain bearing or ball-bearing sheave options available to suit your sailing demands
• Compatible with Barton ball-bearing mainsheet traveler system for smooth operation on larger rigs
• Suitable for up to 12mm (7/16") rope

Designed for durability and versatility

This upright block is specifically engineered for larger cruising and racing yachts, delivering reliable performance in demanding conditions. The robust construction and marine-grade materials ensure longevity under heavy use, while the sleek design complements a wide range of deck layouts.

Specifications

• Sheave diameter: 58mm (2 5/16")
• Rope size compatibility: Up to 12mm (7/16")
• Material: Marine-grade 316 stainless steel (load-bearing components and interior frame)
• Side plates: High-grade molded, through-bolted and riveted
• Sheave options: Plain bearing or ball-bearing
• Manufacturer: Barton Marine
• Manufacturer Part No: N04150
• UPC: 5035088081172