Sea Sure 00.31CRD 25mm Treble Block with Shackle

The Sea Sure 00.31CRD is a 25mm plain bearing treble block with an integrated clevis pin shackle head, ideal for creating mechanical advantage systems on sailboats and other marine applications. Part of Sea Sure's proven "00" series, this treble block features marine-grade 316 stainless steel construction with electro-polished side plates and hollow rivets for exceptional strength-to-weight ratio.

Key Features:

• Marine-grade 316 stainless steel side plates with hollow rivets for reduced weight
• Durable Arnite plastic sheave that is hard-wearing, lightweight, and resistant to abrasion
• Plain bearing design provides years of trouble-free service
• Maximum rope diameter: 8mm
• Breaking load: 1,250 kg (2,756 lbs)
• Can be configured to create 6:1 purchase systems for lifting heavy loads
• Integrated shackle head for easy attachment

This versatile block is commonly used for control lines, halyards, outhauls, kicking straps, furling lines, and can also be adapted for non-marine applications such as garage door mechanisms, lifting systems, and storage solutions. The simple construction and high-quality materials ensure reliable performance in demanding marine environments.