What O-ring size will fit this?

[sujitroy]

This is a torsion bar for a Stag's steering rack. Based on the measurements below, what size O-ring or quad ring size should I look for? The O-ring which came off it was square in profile, but the guy at the O-ring shop handed me a regular O-ring, but didn't give me a size.
A = 13/32" = 0.40625"
B= 39/128" = 0.304"
C = 3/32" = 0.093"

[richardthestag]

Surely if it was square in profile originally it would need to replaced by one square in profile for maximum efficiency.

If your chap doesn't stock square profile o rings then you may need to just hit up the rebuild kit

https://rimmerbros.com/Item--i-518986

[trunt]

The rebuild kit does not include those O rings, at least the two I purchased didn’t. Also the kits seem to have been out of stock for quite a long time.

I used #10 o-rings 1/4x1/16 - bit of a tight fit but they worked.



here are the standard sizes.

size	CS(IN)	ID(IN)	OD(IN)	CS(MM)	D(MM)	OD (MM)
#9	0.070	0.208	0.348	1.78	5.28	8.84
#10	0.070	0.239	0.379	1.78	6.07	9.63
#11	0.070	0.301	0.441	1.78	7.65	11.21