Gage Block Selections

Suffix Number for Selecting Standard and Certificate Provided

ASME
Grade	Steel, CERA
K	-516**
00	-521*
0	-531*
AS- 1	-541*
AS- 2	-551*
* provided with Inspection Certificate
** provided with Calibration Certificate and Inspection Certificate

Grade and Application
Refer to the following table to select the gage block grade according to usage

	Applications	Grade
Workshop use	Mounting tools and cutters	AS-1 or AS-2
Workshop use	Manufacturing gages Calibrating instruments	0 or AS-1
Inspection use	Inspecting mechanical parts, tools, etc	0 or AS-1
Inspection use	Checking the accuracy of gages Calibrating instruments	00 or 0
Calibration use	Checking the accuracy of gage blocks for workshop Checking the accuracy of gage blocks for inspection Checking the accuracy instruments	K or 00
Reference use	Checking the accuracy of gage blocks for calibration For academic research	K

Grade AS-1:
These gage blocks are intended for shop floor use to set and calibrate fixtures as well as precision instruments

Grade 0:
This grade is used within an inspection area to verify the accuracy of plug and snap gages as well as for setting electronic measuring devices

Grade 00:
These higher accuracy gages are intended for use within a controlled environment by skilled inspection staff. Mainly used as reference standards for setting high precision measuring equipment and for the calibration of lower grade gage blocks

Grade K:
Gage blocks of this accuracy are intended for use within a temperature controlled inspection room or calibration laboratory. They should be used as masters with certificates against other gage blocks which are calibrated by comparison