Spinlock Jammer Block B63
Next-day UK delivery available
Order before 3pm — from £3.95
Same-day collection
Available from our North Shields store
Free returns within 30 days
Unused & original packaging

Spinlock

Spinlock Jammer Block B63

Professional-grade marine product — trusted by boaters across the UK.

SKU: B63 Out of stock
£69.95

Tax included. View shipping policy

Next-day UK delivery available — order before 3pm
Same-day collection from our North Shields store
Expert advice — call 0191 414 0065

Klarna & PayPal available at checkout

The Spinlock Jammer Block B63 features a robust design for reliable rope management, ideal for fast sail changes and ensuring optimal performance in the marine environment. Perfect for both cruising and racing sailors. Description The Spinlock Jammer Block B63 is a high-perfor...

The Spinlock Jammer Block B63 features a robust design for reliable rope management, ideal for fast sail changes and ensuring optimal performance in the marine environment. Perfect for both cruising and racing sailors.

Description

The Spinlock Jammer Block B63 is a high-performance marine hardware solution designed for efficient rope management and control. Engineered with precision for both leisure and professional sailing, this jam cleat features an innovative locking mechanism that securely holds ropes in place under varying tension and load conditions. Key features include a robust construction utilizing high-strength materials that ensure durability and resistance to the harsh marine environment. The B63 is compatible with a wide range of rope diameters (8-12mm), making it versatile for applications on dinghies, cruisers, and racing yachts. Its unique design allows for quick and easy operation, enabling sailors to engage and release the jam easily, even in high-stress situations. The Spinlock Jammer Block B63 is particularly beneficial for managing mainsheets, halyards, and control lines, providing sailors with precise control and adjustable tension on their rigging. The lightweight structure reduces overall weight on board, contributing to improved vessel performance without compromising on strength. This product is manufactured according to stringent marine standards, ensuring reliability and longevity. The Spinlock Jammer Block B63 is an essential addition for any sailor looking to enhance their rigging systems with a dependable and efficient solution for managing line tension on the water.

Specification
Product Name Spinlock Jammer Block B63
Weight 0.365 kg
Sheave Diameter 63 mm
Maximum Working Load 1500 kg
Breaking Load 3000 kg
Material Composite/Siliconised Acetal
Line Capacity 10 mm
Operating Temperature -20°C to +70°C
Certifications CE certified
Applications Racing, Cruising
Next-day UK delivery
Available on most items — order before 3pm. From £3.95.
Same-day collection — North Shields
Order online or call ahead — collect from our North Shields store today.
Free delivery over £100
Free standard delivery on all qualifying orders to UK mainland addresses.
Returns — 30 days
Unused, original packaging. Full returns policy →
Not sure which product you need? Call our team on 0191 414 0065
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Why buy from Marine Chandlery?

  • UK marine specialists, based in North Shields
  • Next-day UK delivery available
  • Same-day collection from our store
  • Expert advice before and after purchase
  • Carefully selected marine-grade products
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