FN 509 Tactical Counterbore Screw, .313" (513)

Description: FN 509 Tactical Counterbore Screw, .313" (513). This steel counterbore screw features a black finish and has a torx head. The screw measures 0.4375" overall, and the portion under the head measures 0.313". Sold individually, two of these screws are needed to mount the Vortex Viper MRD (miniature red dot) insert. This is a FN factory original screw for FN 509 tactical pistols chambered in 9mm. This OEM part is made to the highest factory standards in materials and workmanship. Feel secure in knowing the part you order will be the same as the worn or missing part from your FN America firearm.

To ensure that you receive the correct mounting hardware for your FN 509 Tactical, please review the chart below.

Manufacturer: FN America

Note: It is recommended that all FN parts be installed by a qualified and trained gunsmith.