Ronstan Series 40 All Purpose Block - Single - Universal Head

The Series 40 All Purpose Block with a Single Universal Head is the ideal solution for a wide range of marine and boating applications. Engineered for durability and performance, this block ensures smooth and reliable operation whether you're cruising or racing. Its robust construction and innovative design make it perfect for handling sheets, halyards, and control lines with ease.

Key Features

• High Load Capacity: Capable of handling exceptionally high working loads, ensuring safety and reliability under demanding conditions.
• Low Maintenance: Designed for minimal upkeep, providing a long service life even in harsh marine environments.
• Self-Lubricating Sheave: Reduces friction and wear, enhancing performance and longevity.
• Captive Lock™ Universal Head: Allows fixing in two different planes or swiveling freely, offering versatile installation options.
• Slotted Pin Shackle: Prevents fouling of lines, ensuring smooth operation and ease of use.

Applications

Perfect for a variety of sailing and boating needs, the Series 40 All Purpose Block is versatile enough to handle:

• Mainsheet operations
• Halyard adjustments
• Vang controls
• Spinnaker control lines, especially on off-the-beach catamarans, one-design classes, and sportsboats up to 8 meters (26 feet)

Premium Materials

Constructed from high-quality materials to withstand the rigors of marine use:

• U.V. Stabilized Acetal Sheaves: Resistant to ultraviolet rays, ensuring longevity and consistent performance.
• Impact and U.V. Resistant Nylon Cheeks: Reinforced with fibers for added strength and durability.
• Grade 316 Stainless Steel Bearing Race: Offers excellent corrosion resistance, ideal for saltwater environments.
• Grade 316 Stainless Steel Load Strap and Head Fitting: Ensures reliable strength and resistance to marine conditions.

Specifications

Specification	Details
Sheave Diameter:	40mm (1-9/16")
Maximum Rope Diameter:	10mm (7/16")
Pin Diameter:	5mm (3/16")
Minimum Working Load (M.W.L.):	400kg (880lbs)
Breaking Load (B.L.):	1,000kg (2,200lbs)
Weight:	71g (2.5oz)

Why Choose the Series 40 All Purpose Block?

When it comes to marine rigging, reliability and performance are paramount. The Series 40 All Purpose Block offers both, with its superior materials and thoughtful design tailored for the demands of sailing and boating. Whether you're a competitive racer or a weekend cruiser, this block provides the strength and versatility you need to ensure your vessel operates smoothly and safely.

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.