
Ronstan
Ronstan Series 40 AP Block Single
- Full name
- RONSTAN SERIES 40 AP BLOCK SINGLE
- Mfg part #
- RF41100
- UPC
- 9316800242870
- SKU
- 55201
$26.61 $29.94
● In stock — 4 available · FL
🚚 Free shipping over $100
30-day returns. Details
✓ In stock, ready to ship from our FL warehouse
Secure checkout · prices verified at checkout
Genuine parts from authorized distributors. Questions? getboatparts@gmail.com
- 30-day returns
About this part
The Ronstan Series 40 AP Block Single is a genuine Ronstan part (manufacturer part # RF41100, UPC 9316800242870) in our Blocks range under Sailing. 4 are in stock, shipping from our Florida warehouse. Shipping weight is about 0.17 lb.
Manufacturer description
Series 40 All Purpose Block - Single - Universal Head
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.
Features:
Applications:
Materials:
Specifications:
Sheave Ø: 40mm(1-9/16")
Max. Rope Ø: 10mm(7/16")
Pin Ø: 5mm(3/16")
M.W.L.: 400kg(880lbs)
B. L.: 1,000kg(2,200lbs)
Weight: 71g(2.5oz)
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.
Features:
- Exceptionally high working loads
- Low maintenance, long service life
- Self-lubricating sheave
- Captive Lock™ universal head
- Slotted pin shackle eliminates fouled lines
Applications:
- Mainsheet
- Halyard
- Vang
- Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8M(26')
Materials:
- U.V. stabilized Acetal sheaves
- Impact and U.V. resistant, fiber reinforced Nylon cheeks
- Grade 316 stainless steel bearing race
- Grade 316 stainless steel load strap and head fitting
Specifications:
Sheave Ø: 40mm(1-9/16")
Max. Rope Ø: 10mm(7/16")
Pin Ø: 5mm(3/16")
M.W.L.: 400kg(880lbs)
B. L.: 1,000kg(2,200lbs)
Weight: 71g(2.5oz)
Related parts

Ronstan
Ronstan Series 55 Ratchet Mount Orbit Block- Fiddle
Part # RF56510
$99.90In stock

Harken
Harken 16mm Double Block
Part # 406
$36.95In stock

Barton Marine
Barton Plain Bearing Pulley Block Single w/ Swivel & Becke
Part # N01131
$27.92In stock

Schaefer Marine
Schaefer Spring Loaded Genoa Lead Block on Lined Slide for
Part # 504-82
$217.51In stock