How to Measure Screws & Washers Fastener Length Typically, fastener length is measured from where the surface of the material wil be when the fastener is completely installed to the end af the fastener, For astatine, on fasteners hes he Aad sts dove the Santos {he pon od sve hex bode), it will bas stevedore tho sander the hed to che end thereafter. Whereas fasteners that st dash to the surface fe. fit head screw) ave measured from the tog of the head to the end of the fastener.
