Ronstan Series 40 All Purpose Single Stand-Up Block, RF41140

The Ronstan Series 40 All Purpose Single Stand-Up Block is a versatile hardware solution for both cruising and racing sailboats. Designed for use with sheets, halyards, and control lines, this block features self-lubricating Acetal polymer sheaves that perform consistently under both dynamic and static loads. The integrated Captive Lock universal head can be fixed in one of two planes or left to swivel, providing flexibility for various rigging setups.

• Exceptionally high working loads for reliable performance
• Self-lubricating sheave for low maintenance and long service life
• Captive Lock universal head system
• Mounting requires 2 x 5mm (3/16 in.) fasteners (not supplied)
• Suitable for mainsheet, halyard, vang, and spinnaker control lines on boats up to 8m (26 ft.)

• Sheave Diameter: 40mm (1-9/16 in.)
• Maximum Rope Diameter: 10mm (7/16 in.)
• Maximum Working Load (M.W.L.): 400kg (880 lbs.)
• Breaking Load (B.L.): 800kg (1,760 lbs.)
• Weight: 72g (2.5 oz.)
• Materials: U.V. stabilized Acetal sheaves, impact and U.V. resistant fiber-reinforced Nylon cheeks, and Grade 316 stainless steel bearing race, load strap, and head fitting