Stand-up bases allow a wide variety of blocks to be held upright, swivel freely, or pivot so lines have a fairlead under load.

Use the 1634 stand-up base with Midrange blocks and 57 mm or 75 mm Cruising ESP blocks.

Block headpost fits into socket without shackle.

Specifications

• Height (mm): 49 mm
• Height (in): 1 15/16 in
• Weight (g): 255 g
• Weight (oz): 9 oz
• Base Ø (mm): 73 mm
• Base Ø (in): 2 7/8 in
• Inside socket Ø (in): 9/16 in
• Inside socket Ø (mm): 15 mm
• Pin Ø (mm): 8 mm
• Pin Ø (in): 5/16 in
• Fasteners (mm): 6 RH mm
• Fasteners (in): 1/4 RH in
• Maximum working load (kg): 1588 kg
• Maximum working load (lb): 3500 lb
• Breaking load (kg): 3175 kg
• Breaking load (lb): 7000 lb
• Use with blocks: Midrange/Cruising ESP