Thread Gauge Compatible External Thread Size #4-40 Compatible Insert Diameter Not Applicable Compatible Insert Length Not Applicable Compatible Insert Material Not Applicable Compatible Insert Style Tanged Tangless Compatible Insert Type Helical Inserts Compatible Internal Thread Size #4-40 Compatible Thread Direction Right Hand Compatible Thread Type Coarse Material Steel Overall Length 4 in System of Measurement Inch Tool Type Thread Gauge Includes - Series Heli-Coil