Topic: Help identify?

[birddog]

I cleaned my striker plates and noticed what appeared to be the letter B scribed in each plate. They are original to the car and have the correct 10/64 stamping. Curious if it's factory marks, or customized by one of the previous owners? I also found two of this bolt and nut in my door hardware bag. Can't remember what it was from. Does it look familiar to anyone. Thank you.

[jwc66k]

It's the supplier's logo on the door striker. All (except a few, ain't that the way) bolt and screw lengths are measured by the grip, under the head to the tip. A diameter, thread per inch and head marking (grade) would help as well on the bolt.
Jim

[C5ZZ]

The bolt and nut look like they are for the strut rod to the lower control arm hardware.