Metric Thumb Screws

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8mm thread length metric thumb screws (M4 Narrow Head is 7mm), for replacing eyepiece retaining thumb screws etc. Product qualifies for low cost 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. Lengths M3, M4, M5, M6 : 8mm M4 Narrow Head : 7mm Show more