These unique Retaining Spacers and Washers feature specially configured inside diameters to grip the screw shank.  This enables the spacers or washers to easily slide onto screws while assuring secured retention via the screw threads. 

Final assembly costs are reduced because of the simplified assembly process.  The spacers accommodate #4, #6, #8 and #10 size screws in body lengths from .125" to 1" in increments of .125", while the washers accommodate #2, #4, #6, #8, #10, .250" and .375" size screws, with thickness of .032" or .062".  

Learn more about these Self Retaining Spacers by clicking here