You can check and adjust your clickers with a good old beam style torque wrench in a pinch. They are still the most accurate and durable. There is a service in Beckley WVA that I have used to have them recalibrated. I have checked before and after with a beam style to confirm that it works. If...
Do not use grade 8 bolts unless you intend to increase the torque to the proper spec for a grade 8 bolt. Torque specs are specific to a fastener not application. The torque on the fastener will cause it to "stretch" to create the maximum clamping pressure that the fastener is capable of without...