Titanium MJ Self-Locking Nuts (All-Metal Prevailing Torque)
Auto-Lok supplies titanium MJ-thread prevailing-torque nuts for weight-critical aerospace assemblies. Titanium offers an excellent strength-to-weight ratio and corrosion resistance, while the MJ thread form supports fatigue-aware joint design when specified by the drawing.
- Material: aerospace-grade titanium (lightweight, corrosion-resistant)
- Thread form: MJ (typical internal classes 4H6H / 4H5H)
- Locking: reusable all-metal prevailing torque (no nylon insert)
When titanium makes sense
Choose titanium when every gram matters (airframe, interiors, UAV, motorsport) and the drawing specifies MJ threads. Titanium can also be valuable where corrosion resistance is needed without heavier alloys.
Thread & installation notes
MJ is not the same as standard metric M. Always match MJ internal threads with MJ external threads.
Installation torque is defined by the joint. Prevailing torque is the resistance from the locking feature—verify both.
Titanium MJ nut range
| MJ thread | Auto-Lok MJ Titanium |
|---|---|
| MJ1,6 × 0,35 | ALNhsrfMJ1,6x035TI |
| MJ2 × 0,4 | ALNhsrfMJ2x040TI |
| MJ2,5 × 0,45 | ALNhsrfMJ2,5x045TI |
| MJ3 × 0,5 | ALNhsrfMJ3x050TI |
| MJ3,5 × 0,6 | ALNhsrfMJ3,5x060TI |
| MJ4 × 0,7 | ALNhsrfMJ4x070TI |
| MJ5 × 0,8 | ALNhsrfMJ5x080TI |
| MJ6 × 1 | ALNhsrfMJ6x100TI |
| MJ7 × 1 | ALNhsrfMJ7x100TI |
| MJ8 × 1 | ALNhsrfMJ8x100TI |
| MJ10 × 1,25 | ALNhsrfMJ10x125TI |
| MJ12 × 1,25 | ALNhsrfMJ12x125TI |
| MJ14 × 1,5 | ALNhsrfMJ14x150TI |
| MJ16 × 1,5 | ALNhsrfMJ16x150TI |
| MJ18 × 1,5 | ALNhsrfMJ18x150TI |
| MJ20 × 1,5 | ALNhsrfMJ20x150TI |
| MJ22 × 1,5 | ALNhsrfMJ22x150TI |
| MJ24 × 2 | ALNhsrfMJ24x200TI |
| MJ27 × 2 | ALNhsrfMJ27x200TI |
| MJ30 × 2 | ALNhsrfMJ30x200TI |
| MJ33 × 2 | ALNhsrfMJ33x200TI |
| MJ36 × 2 | ALNhsrfMJ36x200TI |
| MJ39 × 2 | ALNhsrfMJ39x200TI |
FAQ
Why choose titanium nuts instead of steel?
Titanium is often selected for weight reduction while maintaining strong mechanical performance and corrosion resistance. It’s a common choice where mass savings and environmental durability matter.
Do titanium MJ nuts use a nylon insert?
These are designed as all-metal prevailing-torque self-locking nuts—no nylon element—supporting reuse and temperature exposure.
How do I torque a prevailing-torque nut?
Apply the tightening torque defined for the joint (size/grade/lubrication). Prevailing torque is separate and should be verified against your specification.
Request a titanium MJ quote
Tell us the MJ size, tolerance class, finish preference, and quantity. We’ll confirm options and lead time.