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M1.6 knurled Thumb Screws Black Hand-tightened High Head Step Screw Twist Cylindrical Head Hand Bolts For Computer Case Screw - AliExpress
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Defective Thumb Screw, one of the few parts they do not include a spare for in the MK4 kits. : r/prusa3d
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M3 M4 Knurled-Head Thumb Screws Aluminum Alloy Anodized Manual Adjustment Bolts DIY Parts for PC Computer Case Multicolor Select
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