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All-Purpose Block, Single, 1,650lb. SWL, 4.1oz.

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Manufacturer: Ronstan
Manufacturer Part No: RF51100


All purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required

  • Exceptionally high working loads
  • Low maintenance, long service life
  • Self-lubricating sheave
  • Captive Lock™ universal head
  • Slotted pin shackle eliminates fouled lines


  • U.V. stabilized Acetal sheaves
  • Impact and U.V. resistant, fibre reinforced Nylon cheeks
  • Grade 316 stainless steel bearing race
  • Grade 316 stainless steel load strap and head fitting
  • Impact and UV resistant, fibre reinforced Nylon cheeks


  • Mainsheet and halyard applications, vang and spinnaker control lines on boats to 10m (33ft)


Sheave Ø 2 in.

Max. Rope Ø 1/2 in.

Max. Cable Ø - in

Pin Ø 3/16 in.

M.W.L. 1650 lb.

B. L. 3310 lb.

Weight 4.2 oz.

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