Ronstan Series 40 All Purpose Block - Double Block - Full Swivel Head

The Series 40 All Purpose Block - Double Block - Full Swivel Head is engineered for optimal performance on your vessel, providing reliable strength and smooth operation for a variety of marine applications. Whether you're cruising or racing, this block ensures durability and efficiency in managing dynamic and static loads.

Features

• Exceptional load-bearing capacity for demanding marine tasks
• Low maintenance design ensures a long service life
• Self-lubricating Acetal sheaves for smooth rope movement
• Slotted pin shackle prevents fouling of lines
• Dual-direction swivel head for versatile handling

Applications

• Mainsheet management
• Halyard control
• Vang adjustments
• Spinnaker control lines on off-the-beach catamarans, one design classes, and sportsboats up to 8M (26')

Materials

• UV-stabilized Acetal sheaves ensure resistance to sun exposure and wear
• Impact and UV-resistant, fiber-reinforced Nylon cheeks for enhanced durability
• Grade 316 stainless steel bearing race to prevent corrosion in marine environments
• Grade 316 stainless steel load strap and head fitting for maximum strength and longevity

Specifications

Specification	Details
Sheave Diameter	40mm (1-9/16")
Maximum Rope Diameter	10mm (7/16")
Pin Diameter	5mm (3/16")
Maximum Working Load (MWL)	600kg (1,320lbs)
Breaking Load (B.L.)	1,200kg (2,650lbs)
Weight	135g (4.8oz)

Why Choose Series 40 All Purpose Block?

Designed specifically for the marine environment, the Series 40 All Purpose Block offers unparalleled reliability and performance. Its robust construction with Grade 316 stainless steel components ensures resistance against corrosion, while the self-lubricating Acetal sheaves provide smooth and efficient operation under heavy loads. Whether you're managing sails, adjusting lines, or handling spinnakers, this double block with a full swivel head is the perfect addition to your boating gear.

Installation and Maintenance

Installing the Series 40 All Purpose Block is straightforward, thanks to its user-friendly design. The slotted pin shackle allows for easy attachment and detachment of lines without the risk of fouling. Minimal maintenance is required to keep the block performing at its best—regularly inspect the sheaves and metal components for any signs of wear and clean as necessary to extend the block's longevity.

Customer Reviews

Our customers praise the Series 40 All Purpose Block for its durability and ease of use. Many have highlighted its smooth swivel action and high load capacity as key factors that enhance their boating experience. Join the community of satisfied sailors who trust Series 40 for their marine hardware needs.

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.