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.
- 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