APPLICATION / 01
Build a reference length
Combine selected blocks to obtain the length needed for the setup.
A reference.
For the work
ahead.
81-piece steel
gage blocks
Inch sizes. Three grades.
Factory Certificate of Inspection included.
MEASURE
MACHINE
MAINTAIN
MACHINE
MAINTAIN
P900-S581 · Grade B (P900-S581)Bermuda · USD
CHOOSE YOUR GAGE BLOCK GRADE
81 PIECES PER SET · INCH SIZES · INSPECTION CERTIFICATE INCLUDEDSpecified size tolerance · 1 inch block
Limits vary by size · bars use the same scale
GradeSKUSize tolerance · 1 inch blockComparison · same scale
Select the grade based on the required dimensional tolerance, nominal block size and measurement method. Use the factory inspection record when setting up reference checks.
GRADE REFERENCE / SIZE LIMITS
Size tolerance
by block size.
Compare the specified size limits for AS-1, AS-2 and Grade B across the block sizes in this series.
1 millionth of an inch
= 0.000001 in
| Nominal size | AS-1 | AS-2 | Grade B |
|---|---|---|---|
| Thru 0.050" | ±12 | ±24 | ±50 |
| Thru 0.400" | ±8 | ±18 | ±50 |
| Thru 1" | ±12 | ±24 | ±50 |
| Thru 2" | ±16 | ±32 | ±50 |
| Thru 3" | ±20 | ±40 | ±50 |
| Thru 4" | ±24 | ±48 | ±50 |
AS-1 / AS-2: ASME B89.1.9-2002. Grade B: specified economy grade limits.
PRODUCT VIDEO
See the 81-piece gage block set
A closer look at the set, grades and what’s included.
01 / IN THE WORKSHOP
One set.
A range of reference checks.
Build a known length, establish a setup height, or provide a reference for a measuring instrument.
APPLICATION / 02
Check measuring instruments
Use gage blocks as references when checking micrometers and other precision measuring tools.
APPLICATION / 03
Set a reference height
Use a block stack with a sine tool to establish an angle from a known height.
Application illustrations. Measuring instruments and setup accessories are not included.
Example shown: P900-S581. Inspection results are specific to each set.
02 / THE INSPECTION RECORD
A record for
every set.
Each set comes with a Certificate of Inspection from the factory. Individual serial numbers connect the blocks to their recorded measured deviations.
INDIVIDUAL
Serial numbersFACTORY
Inspection record
Serial numbersFACTORY
Inspection record
03 / SET CONTENTS
81 blocks.
Inch dimensions.
The same nominal sizes are included in Grade B, AS-2 and AS-1 sets. Choose the grade for the tolerance required.
| Increment | Nominal dimensions | Blocks |
|---|---|---|
| 0.0001 in | 0.1001–0.1009 in | 9 |
| 0.001 in | 0.101–0.149 in | 49 |
| 0.050 in | 0.050–0.950 in | 19 |
| 1 in | 1–4 in | 4 |
| Total | 81 | |
04 / CARE & STORAGE
Ready for the next setup.
Handle with clean gloves, keep measuring faces clean, and return the blocks to their fitted solid wood case after use.
Return to the set →
05 / PRODUCT PHOTOGRAPHY
A closer look at the set.
34 product photos across Grade B, AS-2 and AS-1. Browse the complete series gallery.
Select an image, then choose 100% for original-size detail or use + / −.
06 / PRODUCT RESOURCES
More for your setup.
California Proposition 65 Warning
WARNING: This product may contain materials and/or chemicals such as arsenic, lead, and others that are known by the state of California to cause cancer and/or reproductive problems.For more information, visit www.P65Warnings.ca.gov
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