Stainless Steel Nylon Insert Nylock Nuts

A Nylock (Nylon Insert) Nut is a torque prevailing nut which uses a plastic/nylon insert located towards the top of the nut, reducing its inner diameter, which then deforms over the mating thread. This captures the bolt or screw, providing a locking feature causing resistance or prevailing torque – keeping the nut locked in position and resistant to vibration.

This design feature means that the screw threads do not cause damage to the plastic/nylon section allowing the nut to be re-used – although the locking feature will deteriorate after persistent re-use.

The Nylock Nut is an economic locking nut and ideal in applications where vibration or motion could loosen or undo the nut.

The nut can also be used to assist sealing the bolt thread against seepage of oil, water, petrol, paraffin and other liquids. They can be used in environments with relatively high temperatures where they can retain their locking ability up to 121°C.

Available in a range of thread sizes, materials and finishes, with specials available to order.

DIN 985 Type T Nylock (Nylon Insert) Nuts are available in Grade 8, 10 & 12:

Metric Thread – M2 – M56

BA Thread 6BA – 2B

BSW Thread 3/16″ – 2 ½”

BSF ¼” – 3″

UNC 4-10 – 1 ½”

UNF 10-32 – 1 ½”

DIN 982 Type P Nylock (Nylon Insert) Nuts are available in Grade 8, 10 & 12

Metric Thread M5 – M30

BA Thread 6BA – 2B

BSW Thread 3/16″ – 2 ½”

BSF ¼” – 2 3/8″

UNC 6-32 – 1″

UNF 10-32 – 1 ½”

Non-standard sizes, materials and finishes are available to order as specials, including small volume manufacture, modifications and custom parts made to drawings

Finish

Made from 18-8 stainless steel, these locknuts have good chemical resistance and may be mildly magnetic. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use. Metric 18-8 stainless steel is also known as A2 stainless steel. These locknuts meet either DIN 982 or DIN 985, which are no longer active standards, but are still a common reference point for designers.

Black-oxide stainless steel nuts have a dark surface color.