Hobson did you know flyer
Nyloc Thin Hex Nut ISO 10511 Class 04: Sizes and Prevailing Torque (Did You Know)
Hobson's one-page "Did You Know" flyer for its Nyloc thin hex nut (part NN05ZTCM), zinc plated and RoHS compliant, to ISO 10511 class 04. It gives the sizes from M10 to M36 and explains prevailing torque and how to install a nylon insert nut.
What this covers
- Sizes
- Prevailing torque
- Installation
- Features
For Nyloc Nut.
Key things to remember
The essentials from this document in plain words. Check the full document before you rely on a figure.
- Thin nylon insert lock nut, zinc plated (RoHS compliant), ISO 10511, class 04. Use with class 4.6 bolts.
- Seven sizes, M10 to M36: M10 1.50mm pitch, 8.5mm high, 16mm spanner; M20 2.50mm pitch, 15.0mm high, 30mm spanner; M36 4.00mm pitch, 26.0mm high, 55mm spanner.
- The nylon ring inside the top of the nut adds friction that stops the bolt loosening. The torque needed just to turn the nut is called prevailing torque.
- Rule of thumb: add the prevailing torque to your tightening torque, because it is only friction and does none of the bolt tightening.
- Prevailing torque varies with the bolt, the lubricant or plating and the temperature, so published charts are only a guide.
- Do not use impact tools. Install slowly so the nylon ring is not displaced.
Who it helps: Anyone fitting thin Nyloc nuts to class 4.6 bolts who wants the sizes and the right way to tighten them.
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This document is published by Hobson Engineering, who supply this range to us. We show it here in full so you can read it next to the product; the summary above is ours. Read it on this page or download the PDF. For the most current version, ask us.