-min.jpg?ts=1757453413 "Two Way Lock Nuts")
Stainless Steel Two Way Lock Nuts
What are two way lock nuts? Stainless steel two way lock nuts are all-metal lock nuts that can be threaded and locked from either side for reusable, vibration-resistant fastening. Made from 18-8 and 316 stainless, they resist rust and hold at temperatures that would soften a nylon insert nut.
When all-metal locking beats a nylon insert
Two way lock nuts use a distorted-thread section rather than nylon, so they keep their locking action at high temperatures and through more reuse cycles than a nyloc nut. The two-way design means they thread on and lock from either face, which speeds assembly. They are a strong pick for engines, exhaust-adjacent hardware, and equipment that is serviced repeatedly. Use anti-seize to prevent galling, and choose 18-8 for general use and 316 for coastal exposure.
Why choose stainless steel two way lock nuts
- All-metal locking: no nylon to soften in heat.
- Reusable: holds locking action over repeated use.
- Two-way: threads and locks from either side.
- Corrosion resistance: 18-8 and 316 hold up in wet and outdoor use.
Common applications for two way lock nuts
- High-temperature and engine-area hardware
- Equipment serviced and reassembled often
- Heavy vibration joints
- Marine and outdoor hardware (use 316)
For a nylon-based option, see stainless nylon insert lock nuts, and browse every lock nut style on the main lock nuts category.
Stainless Steel Two Way Lock Nuts FAQ
What grades do two way lock nuts come in?
18-8 and 316 stainless. Use 316 for coastal and saltwater exposure.
Can they handle high temperatures?
Yes. With no nylon insert, they keep locking in heat that would soften a nyloc nut, which suits engine and exhaust-adjacent hardware.
Why do all-metal lock nuts feel stiff to thread?
The distorted-thread locking section creates friction by design. Use anti-seize on stainless to prevent galling as you run the nut down.