Brand: Ronstan
Ronstan Series 40 All Purpose Double Block with Full Swivel Head
Ronstan Series 40 All Purpose Double Block with Full Swivel Head
5 available
About this product
The Ronstan Series 40 All Purpose Double Block is a durable, versatile solution for sheets, halyards, and control line applications on cruising and racing sailboats up to 8 meters (26 ft). Featuring a free-swiveling head, this block utilizes self-lubricating Acetal polymer sheaves on polished stainless steel races to ensure consistent performance under both dynamic and static loads.
Key Features:
- Exceptionally high working loads for reliable performance
- Low-maintenance design with self-lubricating sheaves
- Slotted pin shackle to prevent fouled lines
- Two-way head post with full swivel rotation
- Suitable for mainsheet, halyard, vang, and spinnaker control line applications
Technical Specifications:
- Sheave diameter: 40 mm (1-9/16 in.)
- Maximum rope diameter: 10 mm (7/16 in.)
- Pin diameter: 5 mm (3/16 in.)
- Maximum Working Load (M.W.L.): 600 kg (1,320 lbs)
- Breaking Load (B.L.): 1,200 kg (2,650 lbs)
- Weight: 135 g (4.8 oz)
- Materials: UV-stabilized Acetal sheaves; impact and UV-resistant fiber-reinforced Nylon cheeks; grade 316 stainless steel bearing race, load strap, and head fitting
- Manufacturer Part Number: RF41200
- Secure checkout
- 21-day return requests
- Free standard shipping $100+
Product facts
- CT SKU
- CT-105573
- Model / MPN
- RF41200
- UPC / GTIN
- 9316800557400
- Package dimensions (H × W × L)
- 2" X 3" X 4"
- Package weight
- 0.31 lb
- Country of origin
- INDONESIA
Shipping & returns
Shipping & returns
Request an eligible return within 21 calendar days after delivery. Every physical return requires written approval and an RMA number and must be shipped within five business days after the RMA is issued. The customer pays return shipping for an ordinary return. Tug & Tow provides prepaid return shipping for a verified damaged, defective, short, or incorrect shipment. We do not charge a restocking fee. See Shipping & Returns for eligibility, exclusions, and details.
Fit & compatibility
Fit & compatibility
Review the product title, description, images, dimensions, part numbers, and manufacturer details before purchase. For fit-sensitive items, confirm compatibility with your boat, RV, trailer, vehicle, or equipment.
Need help choosing?
Need help choosing?
Send us the product link or SKU, plus details about your boat, RV, trailer, vehicle, or project. We will help you narrow down the right option when product fit is not obvious.
