316 Stainless Steel
7/8" 90° Outside Ball End
| For Use In | Freshwater and Saltwater |
|---|---|
| Tube |
7/8" |
| Ball |
1/2" |
| Material | 316 Stainless Steel |
| Quantity Included |
Individual |
Made from marine-grade 316 stainless steel with a polished finish. It offers excellent corrosion resistance for both freshwater and saltwater environments.
This precision-machined fitting is designed for 7/8" tubing and features a smooth 90° outside ball end that provides a clean, elegant termination for railings, bimini tops, canvas frames, dodgers, and custom tubular assemblies. The outside ball design allows for smooth movement and secure connections while giving a factory-finished look.
It includes a side set-screw hole for secure, vibration-resistant attachment to the tubing.
Suitable for bimini frames, handrails, canvas structures, and other tubular projects on boats where strength, style, and durability are required. For use with product 6805.
o The stainless steel outside ball end fitting, as shown in your reference image (adapted for a 3/4" tube size), is a specialized marine hardware component commonly used in boat canopy and frame systems. It is typically manufactured from 316-grade stainless steel, which offers excellent corrosion resistance, making it suitable for both freshwater and saltwater environments. This grade of steel contains molybdenum for enhanced durability against pitting and rust, especially in harsh marine conditions like exposure to salt spray, UV rays, and moisture.
o Physical Description
o Overall Design: The fitting consists of a cylindrical shaft or stem that inserts directly into the end of a 3/4" outside diameter (OD) tube, such as those used in aluminum or stainless steel framing. The stem is precision-machined for a snug fit and may include a threaded hole for a set screw (e.g., 1/4"-20 size) to secure it in place, preventing slippage during use. Extending from the stem is a curved or angled neck leading to a spherical ball head, typically 1/2" in diameter. In the 90-degree variant (as depicted in your image), the ball protrudes at a right angle from the tube's axis, allowing for offset mounting. The surface is polished for a smooth, reflective finish that resists fouling and eases cleaning.
o Dimensions (for 3/4" Version):
o Tube compatibility: 3/4" OD.
o Ball diameter: 1/2".
o Approximate overall length: 2-3 inches (varies slightly by manufacturer, but compact for easy integration into frames).
o Weight: Around 0.1-0.2 lbs per unit, contributing minimal added mass to lightweight structures.
o Variations: Available in straight (inline) or 90-degree configurations. Your reference appears to be the 90-degree style, which is ideal for corner or angled connections. Some models are cast for strength, while others are machined for precision.
o Uses
o This fitting is predominantly employed in marine applications, particularly for constructing or repairing boat tops and enclosures. Key uses include:
o Bimini Tops and Canopies: It serves as an end termination for the support bows or poles in bimini frames, connecting to deck-mounted hinges or slides. This allows the top to provide shade, weather protection, and UV shielding for passengers while boating.
o Dodgers and Enclosures: In dodger frames (forward-facing windshields or spray shields), it facilitates adjustable connections for folding or stowing the structure.
o Railings and Other Structures: Occasionally used in custom boat railings, awnings, or lightweight marine frameworks where pivoting joints are needed, such as on pontoons, sailboats, or fishing vessels.
o Replacement and Upgrades: Ideal for replacing worn or corroded fittings on existing setups, extending the life of older bimini systems without full replacement.
o It is not typically used in non-marine contexts due to its specialized design, but could theoretically apply to outdoor furniture or tent frames requiring weather-resistant, pivoting ends.
o Functions
o The fitting's primary role is to create a secure, flexible joint in tubular frames, leveraging its ball-and-socket compatibility for enhanced performance:
o Pivoting and Articulation: The ball head mates with a corresponding socket (e.g., in a deck hinge, jaw slide, or eye end fitting), enabling multi-directional movement—up to 360 degrees of rotation in some pairings, plus angular tilt (e.g., 80-90 degrees off-center). This allows the bimini top to fold flat for storage, adjust for different boat angles, or adapt to wind and wave motion without stressing the frame.
o Secure Attachment: Once inserted into the tube and the ball engaged in a socket, it can be locked with a quick-release pin, lanyard, or bolt for tool-free assembly/disassembly. This ensures stability during use while allowing easy breakdown for trailering or off-season storage.
o Protection and Durability: The rounded ball prevents sharp edges from damaging boat upholstery, canvas, or gelcoat surfaces when collapsing the top. Its stainless steel construction provides long-term resistance to environmental wear, with some models offering lifetime warranties against defects.
o Rattle-Free Operation: When paired with inserts (e.g., Delrin in sockets), it minimizes noise and vibration from boat movement or wind.
o Adjustability: The 90-degree design (as in your reference) is particularly useful for creating offset or corner connections in non-linear frames, improving fit on curved decks or irregular boat layouts.
o In summary, this fitting is a robust, low-maintenance component that enhances the functionality and longevity of boat shading systems by providing reliable, adjustable connections in demanding conditions. If you're sourcing one for a 3/4" tube, confirm compatibility with your existing sockets or hinges for optimal performance.
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