Single Stainless Steel Block with UC Sheave 120-05-UC


Single 12 Series Block with UC Ball bearing sheave. Powerful 4" (102mm) sheave diameter runs on Nomex(tm)/Teflon(tm) composite bearing and twin ball bearing races for maximum thrust load capacity. Stainless Steel cheeks are reinforced for high loads. Swivel head "D" Shackle may be locked in place. Bolted construction allows for disassembly and proper maintainence. Length 8-9/32" (210mm), Width 4" (102mm), Thickness 1-1/2" (38mm), Weight 2lbs 13 oz (1.28kg), Maximum line diameter 3/4" (19mm), Pin diameter 7/16" (12mm), Safe Working load 5000 lbs (2270kg).

Schaefer Marine, Inc. warrants its standard catalog products to be free from factory defects in material and workmanship for a period of ten (10) years from the date of purchase, unless otherwise stated in this catalog or any other Schaefer Marine catalog. * Furling, Tuff Luff, and Windlass products have shorter warranties and are shown per product.

We offer free shipping on orders over $100. All other orders are shipped via UPS. For orders outside of the U.S., contact our sales team for custom quote:

Fitting products to your boat is not one size fits all, feel free to reach out to our team for assistance at 508-995-9511 or