Ronstan RF41200 Series 40 Double All Purpose Block with Full Swivel Head

All purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing. Head swivels freely.

Features:

• Exceptionally high working loads
• Low maintenance, long service life
• Self-lubricating sheave
• Slotted pin shackle eliminates fouled lines
• Two way head post

Applications:

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

Materials:

• U.V. stabilized Acetal sheaves
• Impact and U.V. resistant, fiber reinforced Nylon cheeks
• Grade 316 stainless steel bearing race
• Grade 316 stainless steel load strap and head fitting

Specifications:

• Sheave : 40mm(1-9/16")
• Max. Rope : 10mm(7/16")
• Pin : 5mm(3/16")
• M.W.L.: 600kg(1,320lbs)
• B. L.: 1,200kg(2,650lbs)
• Weight: 135g(4.8oz)

Ronstan Series 40 All Purpose Double Block with Full Swivel Head is a versatile sailing hardware solution for cruising sailors, racers, and performance boats requiring dependable sheet, halyard, and control-line handling. The RF41200 combines a freely swiveling head with high working-load capability, low-maintenance construction, and durable materials for reliable service in a range of deck and rigging applications.

Self-lubricating Acetal polymer sheaves run on polished Grade 316 stainless steel bearing races to support both dynamic loads and high static loads. Impact- and UV-resistant, fiber-reinforced Nylon cheeks add durability, while the Grade 316 stainless steel load strap and head fitting provide a robust assembly. The slotted pin shackle helps reduce fouled lines, and the two-way head post allows the block to align effectively as loads change.

Key Features:

• Exceptionally high working loads for demanding sheet, halyard, and control-line applications
• Full swivel head for flexible alignment under changing loads
• Self-lubricating Acetal sheave for low-maintenance operation
• Slotted pin shackle helps eliminate fouled lines
• Durable UV-stabilized, impact-resistant materials for cruising and racing use
• Two-way head post supports versatile rigging configurations

Product Details:

• Brand: Ronstan
• Model: RF41200
• Series: 40
• Block type: Double all purpose block with full swivel head
• Sheave: 1-9/16 inches
• Maximum rope size: 7/16 inch
• Pin size: 3/16 inch
• Maximum working load: 1,320 pounds
• Breaking load: 2,650 pounds
• Weight: 4.8 ounces
• Applications: Mainsheets, halyards, vangs, and spinnaker control lines on off-the-beach catamarans, one-design classes, and sportsboats up to 26 feet
• Materials: UV-stabilized Acetal sheaves, impact- and UV-resistant fiber-reinforced Nylon cheeks, and Grade 316 stainless steel bearing race, load strap, and head fitting

Choose the Ronstan RF41200 Series 40 Double All Purpose Block for durable, adaptable performance in sailing systems where smooth operation and dependable load handling matter.

SEO Meta Description: Shop the Ronstan RF41200 Series 40 double block with full swivel head, self-lubricating sheave, and durable construction for sailing control lines.

Features:

• Double all purpose block with full swivel head for flexible sailing-system alignment

• Self-lubricating Acetal sheave runs on a polished Grade 316 stainless steel bearing race

• Supports a maximum working load of 1,320 pounds and a breaking load of 2,650 pounds

• Slotted pin shackle helps prevent fouled lines

• UV-stabilized and impact-resistant materials support long service life

• Designed for mainsheets, halyards, vangs, and spinnaker control lines