M10 x 40 Flat Head Socket Screw Plain G10.9 Plain

Bremick is an Australian-owned fastener manufacturer and distributor supplying bolts, nuts, screws, washers, threaded rods, socket screws, and anchoring products to construction, engineering, fabrication, and industrial maintenance operations across Australia. This page covers the Metric Flat Head Socket Screw Plain G10.9 Plain, available in 10 fastener size options: M3, M4, M5, M6, M8, M10, M12, M16 and 2 more.

Where this product is used

• Fixing into countersunk holes so the head sits flush, as in jigs, fixtures and covers
• Machine covers and wear plates where a raised head would foul a moving part
• Sliding or rotating assemblies where nothing can stand proud of the surface
• Dry indoor machinery, tooling and equipment
• Heavy-duty assemblies and machine building where a high-strength alloy fastener is wanted
• Choosing between the 108 items here: they cover diameters from M3 to M24 and lengths from 6mm to 180mm.

Choosing the finish

Plain steel carries no protective coating apart from a light oil film, which is why it rusts quickly if it gets wet.

It suits dry indoor jobs, machinery, and assemblies that will be painted, oiled or enclosed. Where the job is outside or damp, move to hot dip galvanised or 316 stainless.

In tooling and machine building, plain alloy socket screws are the usual choice, where the assemblies are usually oiled or enclosed.

What the grade means

Class 10.9 means high-strength alloy steel, the choice for heavy-duty work such as tooling and machine building.

For load-critical, structural or lifting joints, confirm the fastener against the engineer's specification. Fasteners are not lifting rated unless marked.

Features

• Plain finish: suited to dry indoor, oiled, painted or enclosed use
• Class 10.9 alloy steel for high-load work

Key specifications

Selecting the right option

Select flat head (countersunk) socket screws by thread form, diameter and length. Length is measured overall, including the head, so allow for the countersink depth in the part being fixed.