U.S. Customers: Orders shipped from Canada may be subject to U.S. import duties, taxes, and/or tariffs as assessed by U.S. Customs and your carrier. These charges are not included in our product prices or shipping rates. You are responsible for any duties/tariffs/fees due on delivery or prior to delivery.
Canadian Based. Customer Focused.

Premium Marine Quality Parts

Harken
3405

Harken 1 Ton Twing Block

LSN 103567 MPN 3405 UPC 097653296706 MFR Harken
Special Order
BC, Warehouse

"Special Order" items will take longer to process and ship then "Express" items.
Typically takes no more then 14 days for delivery.

For next day parts. Visit our express parts catalog Here.
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$350.21
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1 Ton Twing Block

The Twing block features a spring-loaded side opening mechanism for true one-handed rigging, even while wearing sailing gloves. Black anodized aluminum sideplates are edged with robust bumpers to protect the block, topsides, and deck. The sheave is aluminum rolling on a bearing system shared with Harken's existing 2.3T high-load snatch block. 

Features:

  • Side opening side plate - Easy to rig and remove from sheet
  • Spring loaded button release - Quick one-handed rigging
  • Anti-capsize bar - Keeps sheave aligned on sheet
  • ULC main bearing - Sheave turns smoothly under extreme loading
  • Sideload balls - Carry loads especially when the block is not aligned in light air
  • Thimble at pivot base - Use 1:1 or 2:1 up-down control
  • Machined aluminum inner sideplates - High strength, low weight
  • Soft polyurethane outer side plate bumpers - Protects block and deck

Uses:

  • Twing, tweaker control for code zero sheets
  • Can be used as a snatch block when combined with a soft shackle
  • Spinnaker sheet and guy control

Specifications:

  • Sheave Ø (mm): 38.5 mm
  • Sheave Ø (in): 1-1/2 in
  • Maximum line Ø (mm): 11 mm
  • Maximum line Ø (in): .43 in
  • Maximum working load (kg): 1000 kg
  • Maximum working load (lb): 2205 lb
  • Breaking load (kg): 2000 kg
  • Breaking load (lb): 4409 lb

Documentation

Owner's ManualDownload PDF
Northern Marine Canada
Proudly Canadian Owned & Operated!
Serving customers across Canada & the USA with marine parts and accessories.
Canadian Head Office:
Kingston, Ontario, Canada
Warehouse Locations:
Toronto, Ontario, Canada
New Jersey, USA
Florida, USA

About Us

Northern Marine is a Canadian supplier of premium marine and RV parts and accessories from top industry brands. We focus on quality, accurate listings, and dependable fulfillment so you can maintain, repair, and outfit your boat or RV with confidence.

Our goal is simple: get you the right parts, shipped fast, with straightforward service you can count on.