Solid Aluminum vs Solid Copper Crush Washers

[Moparfiend]

Was looking for those hollow copper crush washers but they are getting harder and harder to find. I can lots of solid copper and aluminum. So I assume aluminum have a lower torque since its softer. Wondering if both are good for PS fluid environment. Both I assume for oil drain plugs.

Opinions?

 

[bm02tj]

Hit a hydraulic shop and ask for the gaskets for BSPP (British Standard Parallel Pipe)
The first time I ran into it I asked every where and the a hydraulic shop said we have and the bin had lots of dust in it

 

[dadsbee]

AN900's AN 900 - xx Size is 16ths of an inch, so a -10 = 5/8ths ID

https://www.aircraftspruce.com/catalog/eppages/an900.php

 

[Fran Blacker]

AN900's AN 900 - xx Size is 16ths of an inch, so a -10 = 5/8ths ID

https://www.aircraftspruce.com/catalog/eppages/an900.php

@dadsbee are those one use copper washers? Was thinking to use on intake manifold plugs. 8 Plugs come off several times a year.

 

[dadsbee]

Single use intended, in reality many use them a second time if need be.. but not recommended. Generally used for drain plugs and the likes.

 

[Moparfiend]

yup those are the type of crush washers I was looking for. For sure those are single use as the hollow section is what gets crushed.