- Joined
- Dec 25, 2011
- Messages
- 10,506
ahh so your saying the nylon inserts don't last too long? I totally agree that slotted heads are the most irritating...they're basically technology that is long gone in my books... I would probably prefer allen or torx.. don't know what Bristol is? and a jam nut...
RA,
Nylok nuts can usually be reused two or three times unless they are being subjected to unusual environments, like inside a high pressure pipeline. Nylok and nylon patch screws are basically good for one installation. They only have at most around 20 to 40% of the amount of nylon in contact that a nut has. Jam nuts are less convenient but if you don't lose them or throw them away, should last the life of the machine.
Bristol is similar to Allen but with splines similar to torx. The difference is that the splines on Bristol sockets and drivers have parallel sides whereas on Torx they are narrow "V" shaped. They date back at least to before WW-II and were commonly used in place of Slot or Allen on most US military radios. Like Torx, they are much less susceptable to rounding out the socket and rounding off the driver than are Allen. But not too easy to find today.
A jam nut is a nut whose most common purpose is to lock a screw in place rather than to carry a load. They are typically about 1/3 to 1/2 of the height of a standard hex nut.