Help pics-lock,special and toothed washer differences.

[Fernando Mendes]

Need help to see pics about differences,what for,etc from lock,special and external toothed washers.

[JBNeal]

Helical spring lockwashers are used to keep theaded fasteners (bolts, screws, nuts) from loosening after they are torqued into position. Once the threaded fastener is hand-tight, it takes 4-5 more turns with a tool to flatten the helical spring lockwasher, then further torque can be applied for a final torque setting.

External or internal toothed lockwashers are used to keep fasteners in place when an electrical terminal is present. Once the fastener is hand tight, it takes less than 1/2 turn with a tool to flatten the toothed or "star" washer, which is usually the maximum torque value for the fastener.

Special washers can be fender washers, which are similar to flat washers except fender washers have 3-4 times the area of a similarly bolt-sized flat washer.

McMaster-Carr.com and Grainger.com have good websites to browse for different style washers available.

Edited September 8, 2011 by JBNeal

[Fernando Mendes]

Ok,thanks.

[Mark D]

LOCK WASHER: A ring-shaped device used to improve the tightness of a screw type fastener. Three types of washer are in common use: plain, spring-lock, and anti-turn (tooth-lock washers). Standard plain washers are used to protect a part from damage or to provide for a wider distribution of the load. Because a plain washer will not prevent a nut from turning, a locking-type washer should be used to prevent a bolt or nut from loosening under vibration. Lock washers create a continuous pressure between the parts and the fastener. The anti-turn type washers may be externally serrated, internally serrated, or both. The bent teeth bite into the bearing surface to prevent the nut from turning and the fastener from loosening under vibration.

[Fernando Mendes]

Which is the sequence when we have the three types of washers together?

[ggdad1951]

generally you'd only use one of the types at a time.

[Fernando Mendes]

Ok.Days ago I put a driving light fender on my WWII GMC 1944 with three type of washers.After I went look for in its maintenance manual and saw only one type(lock washer type).

[ggdad1951]

yah, basiaclly they all are trying to do the same thing but in different ways. You'd hardly, if ever, combine them in my opinion (which is not fool proof).

[Fernando Mendes]

WWII GMC 2 1/2 ton 6x6 1944 Miscellaneous Eletrical with all types of lock washers.