Description
40mm Pivoting Lead Block – Carbo-Cam® Cleat
High-strength pivoting lead blocks with cams are used for halyard controls on larger keelboats and as “headknockers” on dinghies and beachcats for sheeting directly from the boom. Hole spacing and rivet size are the same as Classic models, making upgrades easy. Cam reverses for either up or down cleating.
Can be used as becket block.
Specifications:
- Sheave Ø (mm)40 mm
- Sheave Ø (in)1 9/16 in
- Maximum line Ø (mm)10 mm
- Maximum line Ø (in)3/8 in
- Maximum working load (kg)91 kg
- Maximum working load (lb)200 lb

![Harken 40mm Pivoting Lead Block - Carbo-Cam Cleat [2157]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/harken-40mm-pivoting-lead-block-carbo-cam-cleat-2157.webp)
![Ronstan Series 20 Ball Bearing Block- Single, Stand-Up Loop Top [RF20141]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/ronstan-series-20-ball-bearing-block-single-stand-up-loop-top-rf20141.webp)
![Ronstan Wire Block - Tubular Rivet Head w/Removable Nylatron Sheave - 45mm (1-3/4") Sheave Diameter [RF103]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/ronstan-wire-block-tubular-rivet-head-w-removable-nylatron-sheave-45mm-1-3-4-she.webp)
![Ronstan Series 30 Ball Bearing Block - Single - Loop Top [RF30101]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/ronstan-series-30-ball-bearing-block-single-loop-top-rf30101.webp)
![Ronstan Series 40 All Purpose Block - Double Block - Full Swivel Head [RF41200]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/ronstan-series-40-all-purpose-block-double-block-full-swivel-head-rf41200.webp)
![Ronstan Series 40 Orbit BB Quin Block w/Swivel Shackle [RF48500]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/ronstan-series-40-orbit-bb-quin-block-w-swivel-shackle-rf48500.webp)

![Ronstan Series 50 All Purpose Block - Double [RF51200]](https://www.bestmarinebattery.com/wp-content/uploads/2026/08/ronstan-series-50-all-purpose-block-double-rf51200.webp)
