Ronstan Lightweight Blocks

Ronstan Lightweight Blocks

These lightweight all-purpose blocks from Ronstan are simple, economical, and reliable. Use these for all kinds of general purpose applications. They have grade 316 stainless steel cheeks and Acetal sheaves that are virtually maintenance free ensuring long service life.  Three sheave sizes to choose from -- 3/4, 1, and 1-1/8 inch. (RF2335 has 15/16 inch sheave). Loop head blocks can be attached directly to rope, while the other blocks can be attached with shackles.  

Part # Description Sheave Dia. Max Rope Dia. Max Working Load Breaking Load Weight
mm in mm in kg lb kg lb g oz
RF81 Double, Loop Top 29 1 1/8 8 5/16 450 990 1100 2420 40 1.4
RF82 Triple, Loop Top 29 1 1/8 8 5/16 550 1210 1100 2420 60 2.1
RF83 Double, Loop Top, Becket 29 1 1/8 8 5/16 450 990 1100 2420 50 1.8
RF185 Single, Tube Rivet 29 1 1/8 8 5/16 300 660 900 1980 20 0.7
RF280 Single, Loop Top 29 1 1/8 8 5/16 300 660 600 1320 20 0.7
RF417 Double, Tube Rivet 29 1 1/8 8 5/16 450 990 1300 2860 40 1.4
RF443 Single, Swivel Ring Head 29 1 1/8 10 3/8 250 550 500 1000 44 1.5
RF467 Single, Swivel Shackle Head 29 1 1/8 10 3/8 250 550 500 1100 50 1.8
RF469 Single, Ferrule Eye Head 29 1 1/8 10 3/8 350 770 500 1100 40 1.4
RF470 Single, Becket, Ferrule Eye Head 29 1 1/8 10 3/8 350 770 500 1100 45 1.6
RF471 Single, Becket, Loop Top 29 1 1/8 10 3/8 350 770 700 1980 28 1.0
RF567 Single, Becket, Swivel Shackle Head 29 1 1/8 10 3/8 250 550 500 1100 55 1.9
RF571 Single, Loop Top 25 1 6 1/4 300 660 600 1320 15 0.5
RF572 Single, Becket, Loop Top 25 1 6 1/4 300 660 600 1320 20 0.7
RF573 Single Swivel Shackle Head 25 1 6 1/4 150 330 300 660 20 0.7
RF661 Single, Tube Rivet 19 3/4 5 3/16 150 330 450 990 10 0.4
RF662 Double, Tube Rivet 19 3/4 5 3/16 300 660 600 1320 20 0.7
RF663 Single, Ferrule Eye Head 19 3/4 5 3/16 150 330 450 990 10 0.4
RF666 Single, Loop Top 19 3/4 5 3/16 150 330 450 990 10 0.4
RF681 Single, Loop Top 29 1 1/8 58 5/16 300 660 600 1320 25 0.9
RF2332 Single, Swivel Ring Head 25 1 6 1/4 300 660 600 1320 20 0.7
RF2335 Single, Narrow, Tube Rivet 24 15/16 5 3/16 175 390 350 770 65 2.3


RF185 29mm Single, Tube Rivet Price: $15.26 RF2332 25mm Single, Swivel Ring Head Price: $20.36
RF2335 24mm Single Narrow Tube Rivet Price: $11.86 RF280 29mm Single, Loop Top Price: $9.31
RF417 29mm Double, Tube Rivet Price: $16.96 RF443 29mm Single, Swivel Ring Head Price: $25.46
RF467 29mm Single, Swivel Shackle Head Price: $22.91 RF469 29mm Single, Ferrule Eye Head Price: $14.41
RF470 29mm Single, Becket, Ferrule Eye Head Price: $19.51 RF471 29mm Single, Becket, Loop Top Price: $18.21
RF567 29mm Single, Becket, Swivel Shackle Head Price: $27.16 RF571 25mm Single, Loop Top Price: $10.16
RF572 25mm Single, Becket, Loop Top Price: $13.56 RF573 25mm Single, Swivel Shackle Head Price: $15.68
RF661 19mm Single, Tube Rivet Price: $10.58 RF662 19mm Double, Tube Rivet Price: $22.06
RF663 19mm Single, Ferrule Eye Head Price: $12.28 RF666 19mm Single, Loop Top Price: $10.16
RF681 29mm Single, Becket, Loop Top Price: $14.41 RF81 29mm Double, Loop Top Price: $24.61
RF82 29mm Triple, Loop Top Price: $30.56 RF83 29mm Double, Becket, Loop Top Price: $28.86
Ronstan Lightweight Purchase Blocks

Ronstan Lightweight Purchase Blocks

These lightweight all-purpose blocks from Ronstan are simple, economical, and reliable. Use these for all kinds of general purpose applications. These blocks are often used for light duty purchase systems such as dinghy boom vangs, cunninghams, leech line tackles, etc. Hollow rivets in the block heads can be fitted with shackles. They have grade 316 stainless steel cheeks and Acetal sheaves that are virtually maintenance free ensuring long service life.    

Part # Description Sheave Dia. Max Rope Dia. Max Working Load Breaking Load Weight
mm in mm in kg lb kg lb g oz
RF186 Fiddle, Tube Rivet 29 1 1/8 8 5/16 300 660 600 1320 50 1.8
RF187 Fiddle, V-Jam Cleat, Tube Rivet 29 1 1/8 8 5/16 300 660 600 1320 60 2.1
RF188 Single, Becket, Tube Rivet 29 1 1/8 8 5/16 300 660 600 1320 35 1.2
RF285 Cheek, Curved Base 29 1 1/8 8 5/16 300 660 600 1320 42 1.4
RF341 Single, Becket, V-Jam Cleat, Removable Pin Head 25 1 5 3/16 225 500 450 990 30 1.1
RF342 Double, Becket, V-Jam Cleat, Removable Pin Head 25 1 5 3/16 375 830 750 1650 75 2.7
RF343 Triple, Becket, V-Jam Cleat, Loop Top 25 1 5 3/16 500 1100 1000 2200 75 2.7


RF186 29mm Fiddle, Tube Rivet Price: $25.46 RF187 29mm Fiddle, V-Jam Cleat, Tube Rivet Price: $28.86
RF188 29mm Single, Becket, Tube Rivet Price: $16.11 RF285 29mm Cheek, Curved Base Price: $21.21
RF341 25mm Single, Becket, V-Jam Cleat, Removable Pin Head Price: $26.31 RF342 25mm Double, Becket, V-Jam Cleat, Slot Eye Head Price: $42.23
RF343 25mm Triple, Becket, V-Jam Cleat, Loop Top Price: $50.11
Ronstan Lightweight Upright Leads

Ronstan Lightweight Upright Leads

Upright lead blocks are a low profile solution for leading lines to cleats or jammers. These feature 316 stainless cheeks.

Part # Sheave Material Sheave Dia. Max Rope Dia. Max Wire Dia. Max Working Load Breaking Load Weight
mm in mm in mm in kg lb kg lb g oz
RF453 Black Nylatron 22 7/8 3 1/8 3 1/8 160 350 320 700 30 1.1
RF568 White Acetal 19 3/4 5 3/16 - - 250 550 500 1100 20 0.7
RF569 White Acetal 19 3/4 8 5/16 - - 250 550 500 1100 20 0.7
RF917 White Acetal 19 3/4 8 5/16 - - 250 550 500 1100 20 0.7
RF919 White Acetal 29 1 3/32 6 1/4 - - 600 1320 1200 2640 50 1.8
RF2379 Black Acetal 13 19/32 5 3/16 - - 250 550 500 1100 20 0.7


RF2379 13mm Upright Lead Block Price: $12.28 RF453 Lead Block Flush nylatron sheave Price: $19.51
RF568 Single Standup Lead Block Price: $12.71 RF569 Lead Block Price: $11.86
RF917 19mm Upright Lead Block Price: $11.86 RF919 29mm Upright Lead Block Price: $15.26
Sailing Clothing: Foul Weather Gear | Sailing Footwear | Sailing Life Jackets & PFDs | Sailing Shorts and Pants | Sailing Shirts and Rash Guards | Dry Suits and Wet Suits

Sailing Equipment: Sailboat Blocks | Sailboat Cam Cleats | Shackles and Fids | Sailboat Tillers & Wheels | Mainsheet and Traveler Parts | Sailboat Winches and Winch Handles

Sailing Gear: Sailing Watches and Timers | Sailboat Maintenance | Boat Speed, Wind & Weather Instruments | Sailing Gear Bags & Backpacks | Tools, Knives & Tension Gauges | Sailboat Compasses

Sailing Line: Hi-Tech Single Braids | Dyneema Cored Lines | Dyneema Single Braids | Vectran Cored Lines | Polyester Cored Lines | Small Diameter Lines
Annapolis Performance Sailing Limited Copyright© 2013. All Rights Reserved.

Annapolis Performance Sailing
104 Severn Avenue
Annapolis, MD 21403
(410) 268-3676