A male rod end has a solid shank with external threads. You thread it directly into a female-threaded component — a clevis, a rod body, an actuator end cap. The shank is solid, which gives it higher resistance to bending at the thread root. Male rod ends are the standard choice for push-pull rods, control linkages, and cylinder attachments where the rod takes the full axial load.
A female rod end has a hollow shank with internal threads. A male-threaded rod, bolt, or stud threads into it. The hollow shank makes it structurally weaker in bending than a comparable male end at the same thread size. However, female rod ends are the correct choice when you need to thread onto a fixed stud, a hydraulic piston rod, or any externally threaded shaft you cannot modify.
The structural implication that most guides miss: under bending or transverse loading, female rod ends are more vulnerable at the thread region because the wall thickness is reduced by the internal bore. In applications with significant side loading on the shank — not just axial — male rod ends maintain better structural margins. If you are designing from scratch and the application involves any transverse shank load, default to male.
Left-hand vs. right-hand thread is a separate decision that sits on top of the male/female choice. Rod assemblies with one right-hand and one left-hand rod end allow length adjustment by rotating the central rod without disconnecting either end. This is standard practice in adjustable control linkages and steering tie rods. If length adjustment in service is required, you need one of each.
For stainless steel assemblies specifically: apply anti-seize to all stainless-to-stainless threads regardless of male or female configuration. Austenitic stainless grades gall against themselves under thread torque. This is not covered in most product data sheets, but it is a real assembly risk.