Propeller bolt safetying

My aircraft/propellor with a 912 uses the nord-lock washers along with nyloc nuts for securing the propellor bolts.

 https://www.nord-lock.com/nord-lock/products/washers/?campaign=328043079&content=&keyword=lockwashers&placement=&utm_source=bing&utm_medium=cpc&utm_campaign=Bing_Nordlock&utm_term=lockwashers&utm_content=Bing_Nordlock%20Washer

Hi Murray

The correct way is to use drilled prop bolts and follow AC 43 procedure to lock the bolts with lockwire.  This is common practice.  

https://www.youtube.com/watch?v=7Xck44xYeaE

The video is the typical way to safety prop bolts. 

Cheers

For me this question and answer kind of depends on your Mfg's requirements. Many Mfg's are using the Nord lock washers and have gotten away from the safety wire. If your Mfg uses safety wire then use it. Sensenich uses Nord lock washers. Mfg's like Flight Design use the Nord washers. They do work very well. Matco brake company uses Nord too. They are becoming more and more common. They are a step above the old style split ring lock washers.

I’ve only seen propeller bolts with drilled heads that are easily safety wired. They make a jig for drilling bolts for a reasonable cost if you don’t want to buy them already drilled.

Thanks for the responses. Safety wire isn't possible with the manufacturers (Sonex) spinner that is also the cruch plate. The bolt heads are resessed into the spinner. Attached is a picture. Saber recommended to use Loctite 242 however I feel that would make it difficult to retorque the bolts each time. Sensenich instructions didn't mention a prefered method of securing the bolts. I am thinking of using Nordloc washers but not certain if they require adjustment to torque values based on any friction they may have while tightening. I couldn't find any methods specific to propeller bolts in AC 43