Bohning A Nock .204 - Per 6

Fits small diameter shafts with an ID of .204" (commonly known as 5mm or X Nock). The A Nock features a double-lock throat and raised index. Its throat size is .120" (3.05mm), and each A Nock weighs an average of 7.0 grains (453.6 mg). 

NOT ALL BRANDS OF NOCKS ARE CREATED EQUAL At Bohning, every nock style must pass the following steps before introduction to the market: 1. Computer simulations identify potential weak points. 2. Destructive testing methods expose possible design flaws or material defects. 3. Accelerated life cycle testing using a custom-built bow is performed at kinetic energy levels exceeding 110 ft-lbs (nearly twice that of most hunting bows). A single nock must withstand over 1000 shots or it goes back to step 1. Proudly manufactured at the Bohning Factory in Lake City, Michigan, United States.

Tech tip: for easier insertion and indexing, apply a small amount of Bohning's Tex-Tite or Seal-Tite Wax to the nock shank.