Hardware is a system, and mixed, mismatched parts leak performance and create wear points. Deck fittings and complementary hardware are the cleats, fairleads, bollards, pad eyes, U-bolts, and track fittings that secure, guide, and terminate every line on your sailboat. MAURIPRO stocks sailing hardware accessories for vessels under 30 ft (below ~3,000 kg) generally need hardware rated for 800–1,200 kg working loads, suited to 8–10 mm lines. Boats over 45 ft need heavy-duty hardware rated 3,000 kg or more, handling lines up to 16 mm or larger.
Then adjust for your program: racing boats and offshore cruisers see higher peak and shock loads and often benefit from sizing up, while charter and training boats reward overbuilt hardware that tolerates occasional misuse. WLL equals breaking strength divided by a safety factor, usually 4:1 or 5:1 for marine hardware, to absorb dynamic loading, shock, and fatigue.
| Product | Brand | What it is for |
|---|---|---|
| Ubi Maior Spars, Fittings & Accessories - Mast Sheave 70 mm (Single) - Regatta Ultra S - Max Line: 35/64 in (14 mm) | Ubi Maior | Mast base blocks for running rigging on performance boats |
| Ubi Maior Spars, Fittings & Accessories - Mast Tulip Sheave 90 mm (Single) - Regatta Ultra S - Max Line: 1 7/64 in (28 mm) | Ubi Maior | Mast tulip sheaves for larger diameter lines on racing vessels |
| Hayn | Lifeline gate eyes with interlocking swivel for 3/16" wire rope |
Why does hardware need to match your boat and loads?
Vessels under 30 ft (below ~3,000 kg) generally need hardware rated for 800–1,200 kg working loads, suited to 8–10 mm lines. Boats over 45 ft need heavy-duty hardware rated 3,000 kg or more, handling lines up to 16 mm or larger.
What is WLL and how is it calculated for marine hardware?
WLL equals breaking strength divided by a safety factor, usually 4:1 or 5:1 for marine hardware, to absorb dynamic loading, shock, and fatigue.
Which metal should you choose for deck fittings?
Marine-grade 316 stainless steel is the default for most deck hardware; its molybdenum content resists chloride pitting and crevice corrosion far better than 304.
How do backing plates protect your deck core?
Backing plates distribute load across a larger deck area and prevent core crushing: quarter-inch aluminum suits light-duty fittings, while half-inch stainless steel backs bollards, large cleats, and jackline U-bolts, extending at least an inch beyond the hardware footprint.
What fasteners should you use with hardware?
Use marine-grade stainless fasteners matching the hardware to avoid galvanic corrosion, and prefer bolt-through installations with backing plates for critical fittings.
How do I bed deck hardware properly?
Bed hardware in polyurethane or polysulfide sealant (never silicone), tightening after a partial cure to avoid squeezing out the seal.
What are Ubi Maior Regatta Ultra S mast sheave blocks?
Destined to vessels more performing, the RT REGATA range, collects 30 years of evolution of this type of product. These products are able to withstand high loads while maintaining its low friction ability.
How do I choose between block types?
The RT ULTRA bloks are an evolution of the RT REGATA line,but its elements are lighter, smaller and can bear much higher loads thanks to textile attachments that are centralised in relation to the load.
What are EVE blocks for?
EVE blocks are the answer to the neverending quest for incredible resistance and lightness required by the most demanding professional racing boats and crews.
How does layout decide which hardware to choose?
Layout decides the path each line takes, and the path decides the hardware. Sailboat Hardware at a glance Section What you'll find Blocks & Attachments Blocks, ratchets and the shackles, loops and attachments that route running rigging and multiply purchase.
What is cruising hardware versus performance hardware?
Cruising hardware favours durability, easy service and value — plain-bearing blocks, robust clutches, self-tailing winches. Performance hardware favours low friction and low weight — ball-bearing blocks, lighter cars, faster winch actions — for crews that trim constantly.
When should I replace sailboat hardware?
Replace the highest-load, most-used gear first — it gives the biggest gain and it is where failure matters most — and phase the lighter control hardware over time.
Which should you choose?
Destined to vessels more performing, the RT REGATA range, collects 30 years of evolution of this type of product. These products are able to withstand high loads while maintaining its low friction ability.
Frequently asked questions
What is deck hardware?
Deck fittings and complementary hardware are the cleats, fairleads, bollards, pad eyes, U-bolts, and track fittings that secure, guide, and terminate every line on your sailboat.
How do I choose between blocks and attachments?
Sailboat Hardware at a glance Section What you'll find Blocks & Attachments Blocks, ratchets and the shackles, loops and attachments that route running rigging and multiply purchase.
What is cruising hardware versus performance hardware?
Cruising hardware favours durability, easy service and value — plain-bearing blocks, robust clutches, self-tailing winches. Performance hardware favours low friction and low weight — ball-bearing blocks, lighter cars, faster winch actions — for crews that trim constantly.
What is WLL?
WLL equals breaking strength divided by a safety factor, usually 4:1 or 5:1 for marine hardware, to absorb dynamic loading, shock, and fatigue.
Why should I use backing plates?
Backing plates distribute load across a larger deck area and prevent core crushing: quarter-inch aluminum suits light-duty fittings, while half-inch stainless steel backs bollards, large cleats, and jackline U-bolts, extending at least an inch beyond the hardware footprint.
Can I use 304 stainless steel for marine hardware?
Marine-grade 316 stainless steel is the default for most deck hardware; its molybdenum content resists chloride pitting and crevice corrosion far better than 304.
What sealant should I use when installing hardware?
Bed hardware in polyurethane or polysulfide sealant (never silicone), tightening after a partial cure to avoid squeezing out the seal.
Shop all sailboat blocks & mast base blocks →
Last updated: September 26, 2026.