Amazon.com: uxcell M4 x 40mm Phillips Flat Head Countersunk Bolts Machine Screws 30pcs : Industrial & Scientific
Amazon.com: #4-40 Button Head Socket Cap Screws,Stainless Steel,Full Thread,Right Hand,100 Piece (#4-40 x 1") : Industrial & Scientific
M4-0.7 x 40 mm. Cheese Head Slotted Machine Screw, 100 pk.: Amazon.com: Industrial & Scientific
Amazon.com: uxcell M4 x 40mm Carbon Steel Phillips Pan Head Machine Screws Bolts Combine with Spring Washer and Plain Washers 10pcs : Industrial & Scientific
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Amazon.com: Bolt Base (4mm) M4 x 40 Black 12.9 Grade High Tensile Hex Socket Cap screws Self Colour Allen Bolts DIN 912 - 10 Pack : Industrial & Scientific
Amazon.com: Bolt Base (4mm) M4 x 40 Black 10.9 Grade High Tensile Hex Socket Button Head screws Self Colour Bolts - 10 Pack : Industrial & Scientific