Machine srews M4 Art.No. M4 x 12 mm Ovalhead 100400 M4 x 20 mm Ovalhead 100401 M4 x 16 mm Trusshead 100420 M4 x 30 mm Trusshead 100421 Other dimensions can be delivered on request. All screws in stainless steel, grade A2. The based is a screw head with an inner conic left-hand thread. The screws can only be mounted and dismounted by using a special belonging tool, and can be used in all fields where a safe sealing is needed.
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