Surface Finish Scales | McMaster-Carr

	For Surface Type For Surface Type

	Scale Scale

	Number of Swatches Number of Swatches

	Material Material

Nickel

Plastic

	Length Length

	Width Width

3 1/2"

5 3/8"

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

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Surface-Finish Scales

22-Swatch Scale

30-Swatch Scale

Compare your surface finish to one of the swatches on these scales. The finishes are expressed in microinches (µ").

30-swatch scale comes with a chart to correlate the finishes with CLA and ISO N scales.

No. of Swatches	Scale	For Surface Type	Surface Finish Range, microinch	Lg.	Wd.	Material	Specifications Met		Each
22	Ra	Ground, Lapped, Milled, Profiled, Turned	2-500	2"	5 3/8"	Nickel Alloy	__	0000000	0000000
30	AA, Ra	Ground, Lapped, Milled, Reamed, Turned	2-500	3"	6"	Nickel Alloy	ASME B46.1	0000000	000000

Surface-Finish Scales with Certificate of Calibration

This scale comes with a calibration certificate traceable to NIST that states it has passed a test for accuracy. Compare your surface finish to one of the swatches on the scale. The finishes are expressed in microinches (µ").

No. of Swatches	Scale	For Surface Type	Surface Finish Range, microinch	Lg.	Wd.	Material		Each
22	Ra	Ground, Lapped, Milled, Profiled, Turned	2-500	2"	5 3/8"	Nickel Alloy	0000000	0000000

Economy Surface-Finish Scales

Compare your surface finish to one of the swatches on this scale. The finishes are expressed in microinches (µ").

No. of Swatches	Scale	For Surface Type	Surface Finish Range, microinch	Lg.	Wd.	Material		Each
18	AA, Ra	Flame Cut, Ground, Milled, Turned	16-500	5"	3 1/2"	Plastic	000000	000000