38MM BEARING SHEET BLOCK, WITH BECKET

The Allen A.378 Single Plain Bearing 38mm Block with Becket is a durable 38 mm single-sheave plain bearing block with integrated becket, designed specifically for Laser®, ILCA®, and Pico mainsheet systems. Commonly used as the rear boom mainsheet block, the A.378 provides dependable performance, smooth rope handling, and excellent durability in demanding dinghy sailing conditions.

Constructed from tough marine-grade nylon with a corrosion-resistant stainless-steel frame, the A.378 is engineered to withstand the repeated loads generated by mainsheet trimming. The integrated becket provides a secure dead-end attachment point for the mainsheet, making it an essential component of the standard Laser® / ILCA® boom mainsheet system. Its lightweight, low-maintenance design has made it a popular choice for racing, training fleets, and recreational sailors alike.

Technical Specifications

• Model: Allen A.378
• Product Type: Single plain bearing block with becket
• Application: Laser® / ILCA® / Pico rear boom mainsheet block
• Sheave Diameter: 38 mm
• Maximum Line Diameter: 10 mm
• Bearing Type: Plain bearing
• Number of Sheaves: Single
• Becket: Integrated
• Safe Working Load (SWL): 155 kg
• Breaking Load: 300 kg
• Length: 85 mm
• Weight: 38 g
• Construction: Marine-grade nylon body with stainless-steel fittings
• Corrosion Resistance: Marine-grade materials throughout

Features

• Integrated becket for dead-ending the mainsheet
• Large 38 mm sheave for smooth rope handling
• Durable plain bearing construction
• Lightweight, corrosion-resistant design
• Low-maintenance operation
• Proven performance in Laser® / ILCA® and Pico dinghies
• Excellent strength-to-weight ratio
• Designed for demanding racing and recreational use

Typical Applications

• Laser® rear boom mainsheet systems
• ILCA® rear boom mainsheet systems
• Pico mainsheet systems
• Dinghy mainsheet purchases
• General small boat control systems