All Purpose


Series 50 All Purpose Block, Fiddle with Becket

All purpose fiddle block with becket and universal head


Exceptionally high working loads

Low maintenance, long service life

Self-lubricating Acetal polymer sheave ensures low friction and extreme durability

Captive Lock™ universal head

Slotted pin shackle eliminates fouled lines

Snap fit removable becket pin

Spare Parts - RF51010 Replacement Becket Pin, RF150 Shackle.


Product Specifications
Pin Ø (in)3/16
Max. Rope diameter (in)3/8
M.W.L. (lb)1650
Sheave diameter (in)2 1/8 + 1 5/16
B.L. (lb)3310
Weight (oz)6.2

Product Information

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.

Becket pin is removeable so line can be spliced prior to fitting and is ingeniously locked into position without the use of a clevis pin, split ring or tools.

Technical Information


  • Mainsheet and halyard applications, vang and spinnaker control lines on boats to 10m (33ft).
  • Ideal for fine-tune mainsheet tackles, cunninghams, backstays and other control line purchase systems.



  • Grade 316 stainless steel load strap
  • Impact and UV resistant, fibre reinforced Nylon cheeks


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