Correct size screw tip

[Harv 24]

So I have the Brownell Magna tip screwdriver with the 4 bits
the two larger ones are marked
210-2
210-4
Both are slightly to wide for the yoke screw.
what is the correct size?

 

[Matt_X]

No idea what your yoke screw is but the first number is the width in thousandths of an inch. The second number represent the blade thickness and off the top of my head its not a fixed number. Maybe something posted in here will help.

T

Thread 'Help choosing proper screw drivers'

Jun 4, 2025

Hye
I have a 686-4, another 686-4, a 6i7-6 and a few older J frames. I only have the Wheeler large case 'bit kit' but they dont fit slotted screws that well and scar. I have one Brownells single screw driver #17 and it is the **** for what it fits. I would like to trash the Wheeler stuff and order the singular Brownells screw drivers I would need to take apart the above. Does anyone know of a resource where I could purchase the ones needed to do what i need to do? or is there a kit that covers all the sizes and a few i would never need? thanks for your help

• tesoro
• Replies: 10
• Forum: S&W-Smithing

 

[a5werkes]

After cleaning out the slots with a toothpick, I use magna-visors and evaluate the best fit for the screw in front of me.
My experience is that the yoke screws have been 180-2/ 3 / 4. 150-3, and some 150-1.

Your 210 options seem too wide and will ream the margin of the counter sink in the side plate.

 

[Harv 24]

After cleaning out the slots with a toothpick, I use magna-visors and evaluate the best fit for the screw in front of me.
My experience is that the yoke screws have been 180-2/ 3 / 4. 150-3, and some 150-1.

Your 210 options seem too wide and will ream the margin of the counter sink in the side plate.

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You Sir, are a Prince amoung men, that is what I was looking for, thank you!!

 

[Peak53]

They could be ground to the correct fit.

 

[chief38]

Brownell's 120-1 is what fits my S&W Yoke screws best.

 

[Harv 24]

They could be ground to the correct fit.

I thought about it… But the bits a cheap enough to buy a couple more that are closer to the size I need.