Suspension Tube 21in x 3/4-16 THD

The Suspension Tube 21in x 3/4-16 THD from WEHRS MACHINE is a precision-engineered component designed for custom suspension fabrication and high-performance vehicle modification. Built for serious fabricators, race teams, and aftermarket suspension builders, this tube serves as a critical structural element in custom A-arm assemblies, control arms, and frame-mounted suspension linkages. Whether you're designing a full independent suspension system, upgrading a vintage hot rod, or building competition race geometry, this suspension tube provides the dimensionally consistent foundation required for proper suspension geometry, load distribution, and handling predictability.

Constructed from hardened steel with a protective black oxide finish, the Suspension Tube 21in x 3/4-16 THD features a 1-inch outer diameter and female 3/4-16 thread specification, allowing seamless integration with standard rod ends, spherical bearings, and suspension fasteners. The black oxide coating resists corrosion and surface oxidation while maintaining dimensional accuracy critical to suspension alignment and travel consistency. At 21 inches in length with female threading on the end, this tube accommodates adjustable rod ends and pillow blocks without requiring additional machining, reducing fabrication time and ensuring repeatable geometry across multiple suspension builds. The compact 1.5 x 1.35 x 22.3 inch footprint and 2.48-pound weight make it manageable for one-person assembly while remaining rigid enough to handle multi-g lateral loads during cornering and acceleration.

This component is ideal for fabricators working on independent suspension conversions, custom drag race cars, off-road vehicle builds, and street rod restorations where factory control arms are incompatible with modern geometry or aftermarket chassis. Installation requires standard suspension assembly techniques: threading adjustable rod ends or spherical bearing fasteners into the 3/4-16 female end, positioning the tube at the correct angles to achieve desired roll center and instant center characteristics, then welding or bolting the opposite end to mounting points. Proper measurement and alignment during installation are essential—use this tube as part of a complete suspension geometry package, verifying camber, caster, and toe settings after installation to ensure handling integrity and tire wear consistency.