• Ronstan Series 25 Single Utility Block with Swivel Shackle Head (RF573)
1 1

Brand: Ronstan

Ronstan Series 25 Single Utility Block with Swivel Shackle Head (RF573)

Ronstan Series 25 Single Utility Block with Swivel Shackle Head (RF573)

$21.69
$21.69
Sale Sold out
Shipping calculated at checkout.

4 available

The Ronstan Series 25 Single Utility Block features a swivel shackle head and is engineered for lightweight, durable performance on a variety of watercraft. This block is constructed with 316-grade stainless steel cheeks and UV-stabilized acetal sheaves, providing a maintenance-free solution for your rigging needs. The hollow rivet in the block head accommodates shackles and allows for the addition of a becket for increased purchase.

Key Features and Applications:

  • Ideal for vang, cunningham, and trapeze retriever systems on dinghies
  • Suitable for leech line tackles and bunk adjusters on larger vessels
  • Maintenance-free, lightweight design

Specifications:

  • Sheave diameter: 25mm (1 in.)
  • Maximum rope diameter: 6mm (1/4 in.)
  • Pin diameter: 4mm (5/32 in.)
  • Maximum working load (M.W.L.): 150kg (330 lbs)
  • Breaking load (B.L.): 300kg (660 lbs)
  • Weight: 20g (0.7 oz)
  • Manufacturer Part Number: RF573

Product facts

CT SKU
CT-114623
Model / MPN
RF573
UPC / GTIN
9316800003877
Package dimensions
1" X 2" X 4"
Package weight
0.05 lb

Fit-sensitive item: confirm measurements, model numbers, and manufacturer details before ordering. Tug & Tow does not guarantee universal compatibility from a product page alone.

Shipping & returns

Shipping methods, delivery estimates, and final costs appear at checkout before payment. Some bulky, supplier-shipped, or special-handling items may ship separately. See Shipping & Returns for return windows and eligibility.

Fit & compatibility

Review the product title, description, images, dimensions, part numbers, and manufacturer details before purchase. For fit-sensitive items, confirm compatibility with your boat, RV, trailer, vehicle, or equipment.

Need help choosing?

Send us the product link or SKU, plus details about your boat, RV, trailer, vehicle, or project. We will help you narrow down the right option when product fit is not obvious.