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HARKEN
25mm, 38mm & 51mm Line/Wire High-Strength Blocks

Lightweight, low-friction blocks with hi-load composite bearings carry wire halyards and control line cascades. Side load balls minimize friction from twisting or unfair leads on 304. 300s have thrust washers. Blocks open to allow passage of swaged wire. Cheek blocks come with fasteners.

  • Sheave: Teflon impregnated Hardkote anodized aluminum
  • Ball Bearings: Side-load carbon-black Delrin or thrust washers
  • Sheave Size: 1" (25mm), 1-1/2" (38mm), 2" (51mm)
  • Line Diameter: 1" sheave = 3/32"; 1-1/2" sheave = 1/8"; 2" sheave = 3/16"
  • Shackle/Strap Type: Fixed shackle
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
25mm Single, 1,000lb. SWL, 1.0oz. 359679 300
In stock online.

$33.35

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25mm Cheek, 1,000lb. SWL, 1.25oz. 359703 301
In stock online.

$35.11

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25mm Thru-Deck (13/32" x 1-17/32" cutout), 1,000lb. SWL, 1.0oz. 359737 302
In stock online.

$42.24

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25mm Sheave Only, 1,000lb. SWL, 0.25oz. 383802 303
In stock online.

$21.12

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38mm Single, 1,500lb. SWL, 2.8oz. 359687 304
In stock online.

$54.82

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38mm Cheek, 1,500lb. SWL, 1.3oz. 359711 305
In stock online.

$55.97

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38mm Thru-Deck (17/32" x 2-5/16" cutout), 1,500lb. SWL, 3.3oz. 359745 306
In stock online.

$59.84

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38mm Sheave Only, 1,500lb. SWL, 1.0oz. 383810 307
In stock online.

$33.04

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51mm Single, 2,000lb. SWL, 5.3oz. 359695 308
In stock online.

$80.04

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51mm Cheek, 2,000lb. SWL, 6.0oz. 359729 309
In stock online.

$80.04

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51mm Thru-Deck (9/16" x 2-23/32" cutout), 2,000lb. SWL, 5.8oz. 359752 310
In stock online.

$88.92

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51mm Sheave Only, 2,000lb. SWL, 1.5oz. 383828 311
In stock online.

$52.49

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25mm Single with Becket, 1,000lb. SWL, 1.25oz. 2316511 312
Delivery within 2 - 3 weeks.

$38.72

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38mm Single with Becket, 1,500lb. SWL, 3.0oz. 188701 313
In stock online.

$58.70

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25mm Wire Forkhead Block with Becket, 1,000lb. SWL, 1.0oz. 9485707 466
In stock online.

$34.85

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Product Description

Lightweight, low-friction blocks with hi-load composite bearings carry wire halyards and control line cascades. Side load balls minimize friction from twisting or unfair leads on 304. 300s have thrust washers. Blocks open to allow passage of swaged wire. Cheek blocks come with fasteners.

  • Sheave: Teflon impregnated Hardkote anodized aluminum
  • Ball Bearings: Side-load carbon-black Delrin or thrust washers
  • Sheave Size: 1" (25mm), 1-1/2" (38mm), 2" (51mm)
  • Line Diameter: 1" sheave = 3/32"; 1-1/2" sheave = 1/8"; 2" sheave = 3/16"
  • Shackle/Strap Type: Fixed shackle

Specs

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REVIEW SNAPSHOT®

by PowerReviews
Harken25mm, 38mm & 51mm Line/Wire High-Strength Blocks
 
5.0

(based on 2 reviews)

Ratings Distribution

  • 5 Stars

     

    (2)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

Reviewed by 2 customers

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5.0

I liked the expert help with this quality sheave

By Captain Steve

from Baltimore, MD

Verified Buyer

Comments about 25mm, 38mm & 51mm Line/Wire High-Strength Blocks:

We will trust it to hold our sails securely on our mast.

Service and delivery comments:

Quick delivery just like they said .

  • Was this a gift?:
  • No
 
5.0

Replaces my Split backstay traveler

By YETI

from Texas

Verified Buyer

Pros

  • Becket
  • Smooth

Cons

    Best Uses

    • Backstay Catalina 25

    Comments about 25mm, 38mm & 51mm Line/Wire High-Strength Blocks:

    Using this to replace my split backstay traveler on a Catalina 25. I've got this attached to my backstay turnbuckle. Vectran line run through this to anchor port side. Fiddle block for adjustment and more vectran on the starboard. Gives me 6:1 advantage and handles big winds [25 mph] on the lake like a pro.

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