Bolt tail no go and field gauge.

[URGILOVERR]

Where can I find these .223/5.56 bolt tail no go and field gauges?

 

[papershredder]

Those are standard Ring Gages. You might find a better price elsewhere.

 

[msgriff]

Looks like SOTAR. It used to be if you went to his school, you were able to buy gauges that he has made or buys to his spec. Minimum TDP bolt tail dia. for new is 0.2501". Min. for used is 0.2498", discard at 0.2497". I have seen "No-Go" gauge marked as 0.2496", "Field" marked 0.248.

 

[URGILOVERR]

Looks like SOTAR. It used to be if you went to his school, you were able to buy gauges that he has made or buys to his spec. Minimum TDP bolt tail dia. for new is 0.2501". Min. for used is 0.2498", discard at 0.2497". I have seen "No-Go" gauge marked as 0.2496", "Field" marked 0.248.

Great information thank you sir

 

[URGILOVERR]

Looks like SOTAR. It used to be if you went to his school, you were able to buy gauges that he has made or buys to his spec. Minimum TDP bolt tail dia. for new is 0.2501". Min. for used is 0.2498", discard at 0.2497". I have seen "No-Go" gauge marked as 0.2496", "Field" marked 0.248.

Do you have these ring gauges? If so what are you using? Kinda only wanna get 2 those are super expensive

 

[iceng]

Micrometer. Cheaper, and lots more uses / flexability.

 

[RKBArmory]

Interesting. Does a bolt tail wear out, or is this checking for a manufacturing defect?

 

[URGILOVERR]

Interesting. Does a bolt tail wear out, or is this checking for a manufacturing defect?

Bolt tails can wear especially due to excessive improper scraping/cleaning