Stainless Steel Lock Nuts are also known as nylon lock nuts, self-locking nuts, nylon insert lock nuts and Nyloc nuts. Nylon lock nuts are designed to increase the locking force and prevent the nut from working loose. The internal nylon ring has no threads cut into it; it is forced to deform around the threads as the nut is twisted on, ensuring a tight grip on the thread.
For sizes 1/4-20 and larger, anti-seize thread lubricant is needed to prevent galling and breaking fastener.
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MET / STD:
Are these 316 Stainless?
Jamestown in the past had both 304 and 316 stainless. We use 304 (18-8 ss) above the water line.
The lock nuts are labeled 316 if they are. If not you can assume they are 18-8
Yes they are
No, 18-8 stainless. 316 is a different product. Try this link: < a href="http://www.jamestowndistributors.com/userportal/show_product.do?pid=1899&familyName=316+S%2FS+Lock+Nuts" target="_blank">http://www.jamestowndistributors.com/userportal/show_product.do?pid=1899&familyName=316+S%2FS+Lock+Nuts< /a>
Hex size for the 4-40?
I don't know. We bought and use 10-24 and the hex wrench size is 3/8. You would have to measure a 4-40 to see what size it
7/16" box wrench is the best to use. You have to make sure you tether the wrench to your wrist when working over water.
Since we do not use that size I can't measure one for you. Jamestown should be able to do it. Normally the lock nuts are the same size as a flat nut.
Standard #4-40 machine screws have a 3/16" hex size. If they are of the Large Head type, they will have a 1/4" hex size.
is there any of these for the 10-32x1 flat head machine screws?
Here you go...< a href="http://www.jamestowndistributors.com/userportal/show_product.do?pid=1897&familyName=S%2FS+Lock+Nuts+%28fine%29" target="_blank">http://www.jamestowndistributors.com/userportal/show_product.do?pid=1897&familyName=S%2FS+Lock+Nuts+%28fine%29< /a>
Save time / locks tight
I use these with s/s bolts on my boats. They work great with not having bolts loosening up.
new London NC
Mike- Something wrong here - can't finis
Mike-This product was fine but I was disappointed not to be given a back order date for the balance of my order, extra shipping charges on some of the back ordered parts and finally the inability to fill the last item of my order. These were small items but still they were important to my production.
Tiny Lock Nuts Hold Tight
Needed to secure a bolt in a fan used for dance. The hinge got heavy use and the regular nut would come loose and fall off. Using two nuts together wouldn't do the trick so I went looking for a lock nut. Finding the size I needed was a challenge. Not everyone stocks a #4-40. Found this site and waited for a backorder to come in and couldn't be happier with what I received. I'll use this little gem in my woodworking projects, too.