These ridged or patterned screws remain on the access panel when it is removed. This makes them handy for securing doors and covers that are frequently removed to check an access port or control panel on machinery, electronics or computers. They are also used on assembly lines, where dropped or loose fasteners could cause damage.

Unridged or smooth captive panel screws install into a retainer on electronic panels or boards. No special tools are required to keep these screws secure.

Hygienic truss-head panel screws have an oversized flange with a low head height that provides uniform force distribution. These stainless steel screws have polished surfaces that prevent dirt and dust accumulation and are appropriate for hygienic applications. They are installed using open-end spanner wrenches and are commonly used to fasten cladding panels and plexiglass sheets and covers.

Retainers are adapters that hold captive panel screws in place and help tightly fasten panels or boards in a semi-rigid manner. Retainers are rigid in nature and once installed, usually are not removed.

Combination spanner wrenches are paired with protective caps for installing, adjusting, and removing hygienic fasteners without risk of damage. Caps are secured in the ends of the wrenches and can be manually replaced as needed.

Protective caps for spanner wrenches prevent damage to hygienic fasteners while installing, adjusting, or removing them. These aluminum caps also minimize the risk of contact corrosion and accumulation of dirt and dust on the fasteners. Separate caps are available for open ends and ring ends of the spanner wrenches.