White Nylon

Bolt Size: 3/16" x 5"

This product is constructed from durable black nylon, chosen for its strength, lightweight properties, UV resistance, and excellent corrosion resistance in harsh saltwater and outdoor marine environments (unlike metal alternatives that might rust). It features a base that mounts onto a standard deck track (specifically designed for 0.850-inch / .850 track width), allowing it to slide along the track for adjustable positioning.

The hinge portion consists of a pivoting arm or yoke (U-shaped or similar) that accepts a bolt or pin from the bimini frame tubing (commonly 3/4-inch or similar diameter). The hinge allows the attached structure (like a bimini bow or support leg) to pivot or fold up/down for deployment, stowage, or adjustment.

Integrated into the design is a slide lock feature: a large knurled thumbscrew (often with a knob for easy hand-tightening) that threads through the hinge body. When tightened, it presses against the track or clamps the hinge securely in place, preventing unwanted sliding along the track during use or in rough conditions. This eliminates the need for a separate lock component.

Key specifications (based on the provided details and manufacturer listings):

• Material: Black nylon (UV-stabilized and marine-grade).
• Bolt size: 3/16" diameter x 5" length (the mounting bolt/pin that secures the hinge to the bimini frame or support).
• Track compatibility: 0.850-inch (designed to fit standard marine sliding tracks of this width).
• Color: Black (the 3445B variant; a white version 3445W is also available for matching boat aesthetics).
• Mounting: Deck-mounted via the sliding base on track; the hinge pivots at the top.

It is part of a broader family of Whitecap sliding deck hinges (e.g., side-mount versions like 3430B/3430W or 3424 series), with the combo variant specifically bundling the lock function for added security and convenience.

Primary Functions

• Sliding adjustment: The base glides smoothly along a mounted deck track, enabling fore/aft or side-to-side positioning of the bimini or cover supports without removing hardware.
• Pivoting/hinging: Allows the attached bimini bow, leg, or frame to rotate (typically 90° or more) for easy raising, lowering, folding, or stowing the top.
• Locking/securing: The integrated slide lock (thumbscrew) clamps the unit firmly to the track once positioned, resisting movement from wind, waves, boat motion, or vibration.
• Quick release/adjustment: The lock can be loosened by hand for fast repositioning or removal—no tools required in most cases.

Common Uses

This hardware is primarily used in marine canvas and top systems, especially on:

• Bimini tops — To attach and adjust the forward/aft bows or support legs, allowing the top to be slid back for shade variation, folded down for trailering/low bridges, or secured firmly underway.
• Convertible tops or mooring covers — For adjustable attachment points on deck tracks.
• T-tops, radar arches, or canvas enclosures — Where sliding and pivoting mounts provide flexibility in positioning and quick setup/teardown.
• Boat awnings or dodgers — To create customizable shade or wind protection with easy adjustability.

It's ideal for boats with extruded aluminum or plastic deck tracks (common on powerboats, sailboats, pontoons, and center consoles) where users need reliable, corrosion-free hardware that withstands exposure to sun, salt, and water while offering tool-free operation for frequent adjustments. The combo design simplifies installation and reduces parts count compared to using a separate hinge and lock. It's a cost-effective, durable solution favored by boat builders and owners for its reliability in demanding marine conditions.

Proposition 65 Warnings Website - Your right to know (ca.gov)