SOKO SCSOZCM030030 M3 x 30mm Socket Countersunk Screw, Class 12.9, Zinc Plated

The SOKO socket countersunk screw on this page is a metric screw in class 12.9 with a zinc plated finish. This page lists 24 items from M3 to M20, in lengths from 8mm to 120mm.

The fastener acronym list names this head style: FHCS, Flat Head (Countersunk) Cap Screw, and CSK, Countersunk Head (manufacturer-stated). The head is tapered so that it sits flush in a countersunk hole.

The head carries a socket, so the screw is driven with a key or bit instead of a spanner.

The class table lists class 12.9 as alloy steel, quenched and tempered, for metric sizes M6 to M48 (manufacturer-stated). The item description names alloy.

Strength figures are shown for sizes M6 and above only; the class table does not cover the smaller sizes, so none is published for them. The figures are class minimums, not test results for the screw.

The pitch shown for each size is the coarse pitch given in the thread table (manufacturer-stated).

Pack quantity is shown for each item. It changes with the size and length.

The item descriptions do not give the socket (key) size, head dimensions or thread length for these screws, so none are published.

Where this product is used

• Fastening where the head is to sit flush in a countersunk hole
• Driven from the socket in the head with a matching key or bit
• Replacing a socket countersunk screw of the same thread form, size and length

Features

• 24 items covering M3 to M20, in lengths from 8mm to 120mm
• Metric thread
• Class 12.9, zinc plated finish
• Alloy steel, as named in the item description
• Minimum tensile strength per size from the class table, shown in the tables (manufacturer-stated)
• Pack quantity shown for each item

Common specifications

Key specifications

Selecting the right option

Choose the thread first: the screw must match its nut or tapped hole in diameter and pitch. Metric sizes are the nominal diameter in millimetres; compare the pitch in the tables with your thread. By convention the length of a countersunk screw is the overall length including the head; the item description does not state the measuring point. Check the key size against the screw in hand, as the item description does not state it. For a different class or finish see the related pages.

Related products

Related SOKO socket screws: SOKO Socket Countersunk Screw, Class 12.9, Alloy Steel, Black, M8 to M20, 25 to 240mm and SOKO Socket Head Cap Screw, Class 12.9, Zinc Plated, M3 to M30, 12 to 300mm.