Seldén BBB 40 Double Block through-deck mounted

The Seldén BBB 40 through-deck double block is a powerful ball bearing double block designed for medium working loads on mid-sized sailing boats. This double block mounts directly through the deck or mast using two M5 screws, resulting in a clean and professional installation without separate brackets or shackles. The two sheaves provide mechanical advantage for operating sheets, trim lines and other line routing where power is required.

The stainless steel ball bearings in this Seldén BBB 40 double block ensure exceptionally smooth and reliable operation under dynamic loads. This is particularly important in medium-duty applications where lines are regularly loaded and eased. The glass fibre reinforced polyamide construction combines a remarkably low weight with the strength needed for demanding sailing applications. At just 97 grams, this double block offers an excellent performance-to-weight ratio.

The through-deck mounting of the Seldén BBB 40 double block is ideal for modern sailing boats where a tidy deck and low profiles are desired. By integrating the block directly into the deck, protruding parts are eliminated, reducing the chance of line snagging and chafe. With a safe working load of 250 kg and a breaking strength of 500 kg, this double block is robust enough for use as a sheet tackle, cunningham system or vang block on mid-sized cruisers and daysailers. Suitable for lines from Ø6 to 10 mm, making it applicable with common line diameters on boats in the 30 to 40 foot range.

Features

• Double block with two sheaves for purchase systems
• Stainless steel ball bearings for smooth operation under dynamic loads
• Glass fibre reinforced polyamide sides – light and strong
• Through-deck mounting with 2x M5 screws
• Suitable for mounting through deck or mast
• Ideal for mid-sized boats, sheets and trim lines
• Clean and tidy design without separate brackets

Technical specifications

• Model: Seldén BBB 40
• Type: Double block
• Bearing type: Ball bearing (stainless steel)
• Attachment point: Through-deck mounted
• Mounting: 2x M5 screws
• Suitable for lines: Ø6–10 mm
• Safe Working Load (SWL): 250 kg
• Breaking strength: 500 kg
• Weight: 97 g
• D-shackles included: No
• EAN: 7350044272561
• Article number: 404-101-24