Question for you original guys

[grannyknot]

Now I have no crushing need for an answer, just thought this was kinda puzzling.

As I have been cleaning up the original bolts and screws I noticed

that all of the M6 x 1.0 bolts have the number 4 stamped on the top.

Just trying to figure out what it signifies, strength perhaps?

[Jarvo2]

I ran across this document during my travels...it will answer your question & more. Enjoy!

Datsun Torque Specifications.pdf

[ksbeta]

Now that's a cool .pdf. Thanks Jarvo!

[jfa.series1]

Excellent contribution! Interesting to read the cautions regarding bolts going into aluminum or plastics, and others about compensating for friction due to rust or other issues. Finally the best comment - rely on the FSM.

[grannyknot]

Now I know, thank you.

[ZohanIsBack]

This is great information. I've downloaded it for my records. Thank you so much!

[EuroDat]

Thats a great document explaining bolt torque specs. Added it to my collection. Thanks a lot:classic:

Ive always used an old workshop manual by Tom Monroe for bolts where I couldnt find the tension in the FSM. It has a table in the back with most of the figures. Although not as comprehensive.