Pocster Posted October 10, 2021 Posted October 10, 2021 Sounds stupid; and google seemed vague. If you have a nut and bolt and 1 washer - which side does it go on? ( yes you could buy more washers to solve the conundrum ). I would assume nut side - as that has more chance of moving? WTF don't they supply 2 washers!
Pocster Posted October 10, 2021 Author Posted October 10, 2021 If these type of things get you in the mood. Then split washers will really excite you https://engineerdog.com/2015/01/11/10-tricks-engineers-need-to-know-about-fasteners/
ProDave Posted October 10, 2021 Posted October 10, 2021 In my book the washer goes under whichever one you intend to turn with the spanner to tighten it. Or whichever side has an oversized hole that the bolt or nut might pull through without. 1
TonyT Posted October 10, 2021 Posted October 10, 2021 Remember the split washer after the normal washer ?
Onoff Posted October 10, 2021 Posted October 10, 2021 You could dispense with the full nut and split washer and use a nyloc nut instead. Always, always, always lube the nut / bolt interface with copper or aluminium based anti seize compound when using nyloc nuts.
Roundtuit Posted October 10, 2021 Posted October 10, 2021 1 hour ago, Onoff said: Always, always, always lube the nut / bolt interface with copper or aluminium based anti seize compound when using nyloc nuts. Every day's a school day, and I sense a gap in my education.... why lube something that you want to stay done up tight? 1
markc Posted October 10, 2021 Posted October 10, 2021 From many years of building steel structures, marine and railway engineering, the washer always goes under the part you will turn (additional washer if other side is covering a slot. bolts always go upwards - if a nut should happen to come off the bolt will drop out and be noticeable. never heard of lubricating nylocs as they are made to be used once.
Onoff Posted October 10, 2021 Posted October 10, 2021 (edited) 23 minutes ago, markc said: From many years of building steel structures, marine and railway engineering, the washer always goes under the part you will turn (additional washer if other side is covering a slot. bolts always go upwards - if a nut should happen to come off the bolt will drop out and be noticeable. never heard of lubricating nylocs as they are made to be used once. Best get the grinder ready if you're fitting lots of M16 A2 stainless. Edited October 10, 2021 by Onoff 1
ProDave Posted October 10, 2021 Posted October 10, 2021 5 minutes ago, markc said: bolts always go upwards - if a nut should happen to come off the bolt will drop out and be noticeable. There are places where you would really really really rather the bolt stayed in thanks to gravity and at least the 2 parts were still held together in some form. 1
SteamyTea Posted October 10, 2021 Posted October 10, 2021 4 hours ago, pocster said: bolt 3 hours ago, ProDave said: bolt 2 hours ago, Onoff said: bolt 29 minutes ago, markc said: bolts At least no one has mentioned using screws. I had never heard of lubricating nylocs, but seems it is recommended. And it seems they can be reused. I think the important bit is, if the joint is safety critical, is to use the correct washer/s and torque it up correctly.
Onoff Posted October 10, 2021 Posted October 10, 2021 9 minutes ago, TonyT said: Forget nylocks double nut all the way! I'll raise you full nut and a half nut! ?
Onoff Posted October 10, 2021 Posted October 10, 2021 How about some reassuringly expensive Aerotight nuts,? 1
epsilonGreedy Posted October 10, 2021 Posted October 10, 2021 1 hour ago, markc said: bolts always go upwards - if a nut should happen to come off the bolt will drop out and be noticeable. I just realised how many hours of my life have been wasted screwing all those bolts into each car wheel. In future I am adopting marine engineering standards on the basis that when the single wheel bolt falls out of a wheel I will be alerted. 2
JFDIY Posted October 10, 2021 Posted October 10, 2021 51 minutes ago, Onoff said: I'll raise you full nut and a half nut! ? But which one goes on first?
Onoff Posted October 11, 2021 Posted October 11, 2021 6 hours ago, JFDIY said: But which one goes on first? Obviously the full nut goes on first. The half nut is there just so the subsequent decorative nut caps don't sit properly! ?
JFDIY Posted October 11, 2021 Posted October 11, 2021 2 hours ago, Onoff said: Obviously the full nut goes on first I can't tell how much of the above was tongue in cheek? I've read a few articles over the years and although counter intuitive, they all suggest the full nut on top. This makes a bit of interesting (though some might say boring) reading https://www.boltscience.com/pages/twonuts.htm
Onoff Posted October 11, 2021 Posted October 11, 2021 Been bolting steel up for 40 years. Only ever use a nyloc or full nut & spring washer on assemblies. Usually specified by someone a lot cleverer than me anyway. Very occasionally a castle nut and split pin and even rarer a tri pointed washer on HSFG (high strength friction grip) stuff. I'd have to go way back to think of the last time I used Aerotight or Binx nuts.
markc Posted October 11, 2021 Posted October 11, 2021 16 minutes ago, Onoff said: Been bolting steel up for 40 years. Only ever use a nyloc or full nut & spring washer on assemblies. Usually specified by someone a lot cleverer than me anyway. Very occasionally a castle nut and split pin and even rarer a tri pointed washer on HSFG (high strength friction grip) stuff. I'd have to go way back to think of the last time I used Aerotight or Binx nuts. You missed Tension Control Bolts (TCB’s) and oh the pain of HSFG’s with indicating washers ?
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