8mm thread length metric thumb screws (M4 Narrow Head is 7mm), for replacing eyepiece retaining thumb screws etc.
Price is per screw and includes Canada Post Letter Mail postage.
M3 is often used as eyepiece and diagonal thumbscrews
M4 is commonly used for accessories such as in accessory vixen brackets.
M3, M4, M5, M6 : 8mm
M4 Narrow Head : 7mm