Click to enlargeHarken 25mm Wire Block w/Shackle
Manufacturer: HarkenPart #: 300SKU: 79045
- 1000 lb
Add $51.05 more to qualify for free shipping.
Item #: 79045
Category: Blocks
● In stock — ships fast from US warehouses
- Ships from US warehouses
- Free shipping on orders over $99
- Secure checkout — your info is protected
- Genuine marine-brand parts, not knockoffs
- 30-day returns
- Marine parts support — we know boats
Description
25mm Wire Block with Shackle Lightweight, low-friction wire blocks carry wire halyards and high-strength control lines on boats of all sizes. Specifications: Sheave: 25mm / 1in.
Weight: 28g / 1oz. Shackle pin: 5mm / 3/16in, Maximum wire: 2mm / 3/32in.
Maximum line: 4mm / 5/32in. Maximum working load: 454kg / 1000lb Breaking load: 907kg/ 2000 lb
Specifications
| Brand | Harken |
|---|---|
| Part Number | 300 |
| EverTide SKU | 79045 |
| UPC | 097653010210 |
Specifications are provided by the manufacturer. Confirm fitment for your application before ordering, or contact us and we'll help.
Compare similar products
 |  |  |  | |
|---|---|---|---|---|
| Material | — | Stainless Steel | Stainless Steel | Stainless Steel |
Complete your setup
Returns & warranty
Returns are accepted within 30 dayson items that are unused and in their original packaging. Some items may be subject to a manufacturer restocking fee. Special-order items may not be eligible — if you're unsure, ask us before ordering.
Harken productscarry the manufacturer's standard warranty. For a warranty claim or a return authorization, see our full returns policy or contact us.
Sailing — frequently asked
- How do I size a block for my sailboat?
- Match the block to the line diameter it will carry and to the working and breaking loads of the system (sheet, halyard, control line). Makers publish load ratings and line-size ranges — choose a block whose working load comfortably exceeds the real-world load, without going so large it adds needless weight.
- What is running rigging?
- Running rigging is the moving lines that control the sails — sheets, halyards, and control lines — as opposed to standing rigging (the fixed wire that holds up the mast). Running rigging should be matched to the boat’s blocks, clutches, and winches for smooth, reliable sail handling.
- How do I maintain sailboat winches and hardware?
- Rinse with fresh water after sailing, keep sheaves and bearings clean, and periodically service winches (disassemble, clean, and re-grease per the maker’s instructions). Marine-grade stainless and good maintenance keep hardware working smoothly when loads are high and timing matters.
Customer reviews
No reviews yet — this product.
Fast shipping
Ships from US warehouses — free over $99
The right part
Marine-grade parts matched to your boat
Real support
Questions? We know boats — call or email