Precise fit for 4" - 20 threading applications Designed to match 4" - 20 thread standards. The overall length includes a 3 mm thick gasket so you get the correct installed height and sealing/padding without guesswork. Universal and versatile track compatibility Fits into standard 1/4" T-tracks and any larger T-track. Not compatible with Mini T-tracks smaller than 1/4"—confirm track size before purchase to ensure proper fit. Built for kayak track systems Engineered to work with common kayak track mounts, providing a secure interface for accessories designed for kayak rails. Robust, torque-resistant construction Built to withstand high torque from heavy use without peeling or loosening. Provides a reliable, long-lasting connection for frequent installation and removal. How this helps you Secure mounting: The gasket and correct threaded length reduce movement, vibration, and play, so accessories stay tight under load. Easy compatibility checks: Clear size limits (fits 1/4" T-track or larger; not for mini tracks under 1/4") prevent mismatched purchases. Durable performance: Designed to handle heavy use and torque, minimizing maintenance and replacement. Typical use scenarios Kayak setup: Mount rod holders, camera arms, or small electronics to kayak track systems with a secure, gasketed fit. T-track accessories: Use with 1/4" T-track fixtures on workbenches or portable rigs where a reliable threaded connection is required. Outdoor gear mounting: Install accessories on boats or modular rails where resistance to torque and repeated use matters. Specifications (as supplied) Threading: Optimized for 4" - 20 threading Length: Inclusive of a 3 mm thick gasket Track compatibility: Fits 1/4" T-tracks and larger; not compatible with Mini T-tracks smaller than 1/4" Application: Compatible with kayak track systems Performance: Built to resist high torque and long-term wear Check your thread and track sizes before ordering to ensure compatibility.