Cylinder measuring pins?

[tedog]

Found 7 pins in a yards sale. They are about 2" long and are numbered from .451 to .457 diameter. I assume they are for cyl. throat measurments. Anyone know who makes or sells them. Thanks

 

[glenwolde]

I got my inside (minus) pin gauges from MSC. They come in sets or individually.

https://www.mscdirect.com/browse/tn/?searchterm=minus+pin+gauges&hdrsrh=true&rd=k

Added: ZZ's are fine for measuring throats. Normally a .452 gauge won't fit in a .452 hole. The "minus" or "inside" means they are made to fit the hole so the gauge is a tad undersized. The letter designations refer to how undersized they are and the precision to which they are made. ZZ's are +-.0002, Z's are +-.0001. X and XX are even tighter tolerance.

 

[Protocall_Design]

Those are called gage pins, pin gages, or plug gages. I would look at Home page for them.

 

[BLUEDOT37]

Pin gage sets

They're made by many different companies. Some more economical than others.

I initially was only going to buy them oneses-twoses but I'm glad I bought the whole set.

I've found more uses for them than just checking throats so I ended up getting more.

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