20mm Shoulder (M16 x 2.00p Metric Coarse Thread) Plain Black Uncoated Grade 12.9 Socket Head (10mm Key) Screws ISO 7379

Socket Shoulder Screws are also known as stripper bolts, are essentially a socket cap screw that is only partially threaded with a shoulder. Shoulder bolts are measured by their diameter of shoulder x length of shoulder x thread diameter. These bolts are often used on machinery to provide a smooth surface for bearings to ride on
Also known as: Shoulder Screws, Stripper Bolts, Socket Head Shoulder Screws, Socket Head Stripper Bolt
Material / Coating: Black or plain finish is unfinished (bare steel) has no actual protective coating. You will not have any corrosion resistance and the product will rust over time. The term “black” is an old industry term for plain finish. Depending on the material grade and heat treatment process the colour can vary from a shiny oily finish to a dull black
Galling: can occur when excessive pressure is used to tighten a nut onto a thread, common with stainless fasteners but can also be an issue with other materials. Fasteners with damaged or fine threads are particularly prone to galling.
Some suggestions to help prevent thread galling:
Tightening the nut more slowly without excessive pressure, will frequently reduce or sometimes solve completely, the problem. As the installation RPM speed increases, the heat generated with friction during tightening escalates the chances of thread galling.
Reduce the friction by applying a suitable lubricant to the thread frequently eliminates thread galling. Typical lubricants are chloride-paraffine, molykoat lacquer, molybdenum disulphide, high pressure oil, graphite, mica, or talc, some assemblies where there is extreme pressure, corrosion resistant grease or waxes may also be effective
Thread Pitch (Metric): is the distance between the peaks of two threads along a screw, bolt, nut or fastener expressed in millimetres (mm). Used when referring to Metric parts. For example, a thread pitch of 1.50mm means that the distance between one thread and the next is 1.50mm
How to understand shoulder bolt measurements: Shoulder bolts are measured by their diameter of the shoulder x length of shoulder x thread diameter
Measurements: Thread Lengths have been included as a guide only. Due to stock being sourced from multiple suppliers variations do exist. We will always ship the same brand and thread length but subsequent orders may be another brand and the thread length may be slightly different. If thread length is critical, please message us, we are happy to physically check our stock and advise prior to shipping
Measurements: Every effort has been made to ensure all measurements on our site are accurate and to the relevant standard, they should only be used as a guide. If you see a problem with our specifications please contact us
Dimensions: Our stock is sourced from various suppliers, therefore differences may exist between batches such as head dimensions, thread lengths visible stamped head markings, appearance or actual finish
Driver bits to suit:A large range of suitable driver bits are in the "Drilling, Driving and Tools" section of our website
Photos: are of the product but may not be the actual diameter, height, width, length you may require, always refer to the size in the description and additional specifications data provided prior to ordering
Updating our site: If you see any problems with any of our specifications or you require additional information please contact us
Disclaimer: Technical data and specifications were researched and compiled from numerous industry sources for the sole purpose of providing basic information. All material is advisory only and its use by anyone is entirely voluntary. Reliance on it for any purpose by anyone is at the sole risk of that person, and Bolt and Nut Australia is not responsible for any loss, claim or damages arising therefrom. In developing this information, Bolt and Nut Australia has made a determined effort to present it accurately
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More Information
System of Measurement	Metric
Product	Socket Shoulder Screw
Head Type	Cap Head
Size & Thread Pitch	M16 x 2.00p Coarse
Thread Pitch	2.00mm
Thread Direction	Right Hand
Thread Type	Metric - Coarse
Corrosion Protection Level	Poor
Class / Grade	High Tensile Grade 12.9
Material	Alloy Steel Heat Treated
Finish	Plain Black Uncoated
Length (l)	Select from the dropdown
Shoulder Diameter (ds)	19.92 - 19.98mm
Head Diameter (a)	29.67 - 30.00mm
Thread Length Max (t)	22.40mm
Head Height (h)	13.73 - 14.00mm
Drive Size	10mm
Drive Type	Internal Hex
Closest size in mm	M20 (20mm)
Standard Made To	ISO 7379
Brand	Hobson Engineering
Alternative Brands	Brighton Best