BLOCKM-Series Fixed-Lead Block


Fulfilled from vendor
Model # 11838968 | Mfg # M66-92 | UPC # 740507904387
BLOCKM-Series Fixed-Lead Block



Schaefer Aluminum lead block swivels 45° to each side of the track preventing the block from hitting the deck. 

Computer-machined aluminum construction maintains sideplate strength while minimizing weight, giving these blocks an incredible strength-to-weight ratio and a distinctive, clean look. Torlon™ rollers and Delrin® ball bearings in the sheave handle high loads with low friction. An excellent alternative for sailors interested in a lightweight choice.

Key Features 

  • CNC-machined aluminum with outstanding strength-to-weight ratio
  • T-Track runs on polyethylene liners 
  • Torlon™ rollers and Delrin™ ball bearings handle high loads with low friction
  • Finished in hardcoat anodized black for durability
  • Machined center of the block may be used as a "becket" 
  • Max. Working Load (MWL): 2800 lb. (1270 kg)  
  • Weight: 1 lb. (454 g) 
  • Length: 4" (102 mm)


BLOCKM-Series Fixed-Lead Block

Name Value
Becket No Becket
Diameter 1/2 Inch or 13 mm
Direction Any
Integral Cleat No Integral Cleat
Mount Type Mechanical Fasteners
Ratchet Non Ratcheting
Safe Working Load 2800 Pounds
Sheave Diameter 66 mm
Type Single Pivoting
Weight 16 Ounces


The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.

Related West Advisor Articles


Product Q & A