Hobson Metric Socket Head Shoulder Screw, M5 / 10mm

The Hobson metric socket head shoulder screw has a metric thread and is alloy steel, plain finish, grade 12.9. There are 43 items: M5 to M20, in lengths from 10mm to 100mm. A shoulder screw has an unthreaded shoulder under the head, then a smaller threaded section.

Shoulder length is the length of the shoulder, not the length of the thread. These screws are Grade 12.9. It changes with the size and length.

Where this product is used

• Guides and sliding parts that need a precise diameter to run on
• Bearing shafts and small axles, where the shoulder gives a true diameter for the bearing
• Replacing shoulder screws where both the shoulder length and the thread size have to match
• Assemblies that will be painted, oiled or enclosed after fitting
• Heavy-duty, high-load assemblies in machinery and equipment
• The 43 items cover diameters from M5 to M20 and lengths from 10mm to 100mm, confirm the size against your drawing before ordering

Features

• 43 items: M5 to M20
• Metric thread, socket head shoulder screw
• Alloy steel
• Plain finish
• Pack quantity shown for each item
• Plain finish: suited to dry indoor, oiled, painted or enclosed use
• Class 12.9 alloy steel for heavy-duty, high-load work

Key specifications

Choosing the right option

Choose the thread form first: the screw must match its nut or tapped hole in thread form, diameter and pitch.

A plain finish means bare steel with only a light oil film on it. It will rust quickly in damp conditions. 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. Plain alloy steel socket screws are the normal choice for tooling and machine building, where the parts are usually oiled or enclosed.

Property class 12.9 is an alloy steel class for heavy-duty, high-load fixing. For load-critical, structural or lifting joints, confirm the fastener against the engineer's specification. Fasteners are not lifting rated unless marked.

Related socket screws: Hobson UNC Socket Head Shoulder Screw, Alloy Steel, Plain, #10-24 to 1/2" and Hobson BSW Socket Head Shoulder Screw, Plain, 3/8 x 1/2 x 1, Box of 25.