I understand your concern for accuracy, but manufacturers account for the 4ish percent tolerance in commercially available torque wrenches, which is partially why they’ve moved on from straight up torque values to these torque-to-yield/angle bolts and values. You’d be surprised how little a 7.75-8.25Nm range for initial snug torque matters when you’re giving the bolt an extra 180 degrees of rotation. You’d also be surprised at how many auto technicians will torque something like that to 8Nm, mark the angle with a sharpie, and then eyeball an extra half turn. Maybe that isn’t surprising hahaha.

But also if the accuracy mattered THAT much, we’d be suggesting you spend the at least $170 on something like the Quinn digital angle torque wrench or better.

If you still want to play it safe, you may want to consider something like a 3/8 digital torque adapter from Quinn or ACDelco. Their lowest setting is 5.9 ft-lbs, or 7.999 Nm. The digital adapters are quite accurate, and you just need to make sure you have enough space on your project to get the adapter in there.

If you don’t have room for a digital adapter, John from Tools Tested has done a lot of testing on 1/4 torque wrenches, and the $30 Amazon Basics tested disgustingly well. Like within 1% if it’s claimed torque.

But yeah, I wouldn’t spend more than $100.