Description
Series 3 Flat Base/Alum Cheek/Delrin Sheave
Delrin™ plain bearing sheave ensures smooth operation and high safe working load. Stainless Steel base distributes loads to a larger surface area.
Specifications:
- Sheave Dia. 1-7/16″ (37 mm)
- Max Line 7/16″ (11 m)
- Length 2-7/8″ (73 mm)
- Width 1-3/4″ (44 mm)
- Height 3/4″ (19 mm)
- Fasteners (4) 10- RH (5 mm)
- C/C 2-3/8″ (60 mm)
- SWL 1000 lbs. (450 kg)
- Weight Alum. 2.5 oz. (71 g)

![Schaefer Series 3 Flat Base /Alum Cheek /Delrin Sheave [303-09]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/schaefer-series-3-flat-base-alum-cheek-delrin-sheave-303-09.webp)
![Harken 40mm Carbo Air Fiddle Block w/SwivelBecket [2656]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/harken-40mm-carbo-air-fiddle-block-w-swivelbecket-2656.webp)
![Harken 45mm Single Element Block w/SwivelBecket [6231]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/harken-45mm-single-element-block-w-swivelbecket-6231.webp)
![Harken 16mm Double Block [406]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/harken-16mm-double-block-406.webp)
![Harken 57mm Carbo Block Flip Flop w/Cam [2143]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/harken-57mm-carbo-block-flip-flop-w-cam-2143.webp)
![Harken 22mm Micro Block [224]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/harken-22mm-micro-block-224.webp)
![Harken 45mm Double Element Block w/Swivel [6238]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/harken-45mm-double-element-block-w-swivel-6238.webp)
![Harken 45mm Double Element Block w/SwivelBecket [6239]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/harken-45mm-double-element-block-w-swivelbecket-6239.webp)
![Harken 29mm Triple Carbo Air Block w/Swivel [344]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/harken-29mm-triple-carbo-air-block-w-swivel-344.webp)