The primary duty of Fine-Thread Hex Flange Nuts is a hex flange nut on a fine-pitch thread that spreads load without a washer. Below: the sectors that specify them in volume, the checklist used to select the right size and material for the application, installation notes, and the known limits of the type. Stocked across roughly M8 to M20, they cover general to heavy-duty work.
Typical Applications for Fine-Thread Hex Flange Nuts
The most common settings where these are specified:
- Automotive: fine-thread studs on housings and brackets.
- Machine building: flange nuts on precision studs.
- Motorcycles: engine and frame fixings.
- Compressors: covers and heads.
How to Specify Fine-Thread Hex Flange Nuts for Your Application
- Size: Match the nominal size to the mating thread or hole. This product spans M8–M20; check the full table below for the exact dimensions of each size.
- Locking & grade: Match the strength grade to the bolt, and choose a locking style (nyloc, all-metal, serrated flange) if the joint sees vibration.
- Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
- Standard: This product is supplied to ISO 10663. Quoting the standard on your order guarantees interchangeable dimensions between suppliers.
Installation & Assembly Practice
- Run the nut down by hand before applying the wrench to catch cross-threading early.
- Tighten the nut rather than the bolt head where access allows — the torque-to-preload relation is more consistent.
- For locking styles, note that nyloc inserts are single-use in critical joints and lose grip above roughly 120 °C.
Common Selection Mistakes with Fine-Thread Hex Flange Nuts
- Pairing a high-class bolt with a lower-class nut — the nut strips before the bolt reaches proof load; the nut class must meet or exceed the bolt class.
- Using a plain nut with a spring washer in severe vibration instead of a prevailing-torque locking nut.
- Re-using nyloc nuts in critical joints.
Where Fine-Thread Hex Flange Nuts Are Not the Right Choice
Not on their own — they need a matching bolt or stud — and a plain nut is not a substitute for a locking type under heavy vibration.
Custom manufacturing · Made to drawing
Need a fine-thread hex flange nuts outside the standard range?
Locking method is specifiable independently of the rest: nylon insert, all-metal deformed thread, serrated flange, or none. Made by cold heading or tapping.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
