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Part# 12-00519
MFR Model# 14
DescriptionPart No.
No. 14 - Fractional Drill Gage12-00519


General’s Drill Gages help you to quickly and accurately identify the sizes of stray drill bits in your workshop. These gages can be extremely useful with older, unmarked bits or ones that are too small for markings. Each heat treated, heavy steel gage is machined to close tolerance for spot-on accuracy. The bit sizes and decimal equivalents are permanently etched to the face to provide years of dependable use.

No. 14 Drill Gage
• For identifying fractional size drill bits
from 1/16” to 1/2” x 64ths.
• Drill Gage measures 6-1/2” x 2-1/2”.
• Conforms to governments
specifications GG-G-86b.

No. 15 Drill Gage
• For identifying number size drill bits
from 1 to 60.
• Drill Gage measures 6-1/2” x 2-1/2”.
• Conforms to governments
specifications GG-G-86b.

California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.


  • Great for use with older or smaller unmarked bits.
  • Made of heat-treated, heavy gage steel.
  • Holes are machined and ground to close tolerances.
  • Hole sizes and decimal equivalents are permanently marked on face.


Natron A Verified Purchase


October 3, 2023

Robert C Verified Purchase


April 27, 2023

Don R Verified Purchase


April 12, 2022

I can’t imagine working with drills and bolts without the guidance of this well made and easily read tool

Michael H
April 5, 2021

This product is very precise, very high quality drilled holes, however the printing of the numbers and labels were a bit blurred which I didnt like. It would be nicer if they were laser etched or printed finer. The tool is overall great quality, very strong steel, and will last a life time and more if its taken care of. This will be the only 1 I ever need to buy.

Bill A
February 5, 2020


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

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