Finger Shims | McMaster-Carr

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42 Products

Multislotted Shims

Streamline the leveling of machines and positioning arms with multiple, evenly spaced mounting fasteners by using a single shim. Slip these shims around existing fasteners without unfastening them, simultaneously leveling each point. They're also known as finger shims.

You can stack multiple shims to achieve your exact thickness, but stacking more than four may cause them to shift. Remember, fewer shims are better, so a couple of thicker shims are more stable than a bunch of thin shims.

Carbon Steel—Best for dry environments since moisture will cause these shims to rust.

				Slot
	Thk.	Thk. Tolerance	For Max. Screw Size	Wd.	Dp.	Lg.	Wd.	Shim Trade Size	Min. Hardness	Pkg. Qty.		Pkg.
Carbon Steel







				2 Slots

				0.015"	-0.002" to 0.002"	3/8"	13/32"	11/16"	1"	1 3/8"	—	Rockwell B90	1	3310N201	00000


				0.032"	-0.002" to 0.002"	3/8"	13/32"	11/16"	1"	1 3/8"	—	Rockwell B90	1	3310N202	0000
				0.062"	-0.002" to 0.002"	3/8"	13/32"	11/16"	1"	1 3/8"	—	Rockwell B70	1	3310N203	0000
				0.25 mm	-0.03 mm to 0.03 mm	M10	10.5 mm	17.8 mm	25 mm	34 mm	ASH202	Not Rated	10	3310N21	00000
				0.5 mm	-0.03 mm to 0.03 mm	M10	10.5 mm	17.8 mm	25 mm	34 mm	ASH205	Not Rated	10	3310N22	00000
				1 mm	-0.03 mm to 0.03 mm	M10	10.5 mm	17.8 mm	25 mm	34 mm	ASH210	Not Rated	10	3310N23	00000
				2 mm	-0.03 mm to 0.03 mm	M10	10.5 mm	17.8 mm	25 mm	34 mm	ASH220	Not Rated	10	3310N24	00000




						3 Slots

						0.015"	-0.002" to 0.002"	5/16"	11/32"	9/16"	13/16"	1 13/16"	—	Rockwell B90	1	3310N361	0000


						0.015"	-0.002" to 0.002"	3/8"	13/32"	11/16"	1"	1 7/8"	—	Rockwell B90	1	3310N301	0000
						0.032"	-0.002" to 0.002"	5/16"	11/32"	9/16"	13/16"	1 13/16"	—	Rockwell B90	1	3310N362	0000
						0.032"	-0.002" to 0.002"	3/8"	13/32"	11/16"	1"	1 7/8"	—	Rockwell B90	1	3310N302	0000
						0.062"	-0.002" to 0.002"	5/16"	11/32"	9/16"	13/16"	1 13/16"	—	Rockwell B70	1	3310N363	0000
						0.062"	-0.002" to 0.002"	3/8"	13/32"	11/16"	1"	1 7/8"	—	Rockwell B70	1	3310N303	0000
						0.25 mm	-0.03 mm to 0.03 mm	M8	9 mm	14.5 mm	20 mm	46 mm	ASH302N	Rockwell B90	10	3310N351	0000
						0.25 mm	-0.03 mm to 0.03 mm	M10	10.5 mm	17.8 mm	25 mm	48 mm	ASH302	Not Rated	10	3310N31	0000
						0.5 mm	-0.03 mm to 0.03 mm	M8	9 mm	14.5 mm	20 mm	46 mm	ASH305N	Rockwell B90	10	3310N352	0000
						0.5 mm	-0.03 mm to 0.03 mm	M10	10.5 mm	17.8 mm	25 mm	48 mm	ASH305	Not Rated	10	3310N32	0000
						1 mm	-0.03 mm to 0.03 mm	M8	9 mm	14.5 mm	20 mm	46 mm	ASH310N	Rockwell B90	10	3310N353	0000


						1 mm	-0.03 mm to 0.03 mm	M10	10.5 mm	17.8 mm	25 mm	48 mm	ASH310	Not Rated	10	3310N33	0000
						2 mm	-0.03 mm to 0.03 mm	M8	9 mm	14.5 mm	20 mm	46 mm	ASH320N	Rockwell B90	10	3310N354	0000
						2 mm	-0.03 mm to 0.03 mm	M10	10.5 mm	17.8 mm	25 mm	48 mm	ASH320	Not Rated	10	3310N34	0000




								4 Slots

								0.015"	-0.002" to 0.002"	5/16"	11/32"	9/16"	13/16"	2 7/16"	—	Rockwell B90	1	3310N461	0000


								0.015"	-0.002" to 0.002"	3/8"	13/32"	11/16"	1"	2 1/2"	—	Rockwell B90	1	3310N401	0000
								0.032"	-0.002" to 0.002"	5/16"	11/32"	9/16"	13/16"	2 7/16"	—	Rockwell B90	1	3310N462	0000
								0.032"	-0.002" to 0.002"	3/8"	13/32"	11/16"	1"	2 1/2"	—	Rockwell B90	1	3310N402	0000
								0.062"	-0.002" to 0.002"	5/16"	11/32"	9/16"	13/16"	2 7/16"	—	Rockwell B70	1	3310N463	0000
								0.062"	-0.002" to 0.002"	3/8"	13/32"	11/16"	1"	2 1/2"	—	Rockwell B70	1	3310N403	0000
								0.25 mm	-0.03 mm to 0.03 mm	M8	9 mm	14.5 mm	20 mm	61 mm	ASH402N	Rockwell B90	10	3310N451	0000
								0.25 mm	-0.03 mm to 0.03 mm	M10	10.5 mm	17.8 mm	25 mm	63 mm	ASH402	Not Rated	10	3310N41	0000
								0.5 mm	-0.03 mm to 0.03 mm	M8	9 mm	14.5 mm	20 mm	61 mm	ASH405N	Rockwell B90	10	3310N452	0000
								0.5 mm	-0.03 mm to 0.03 mm	M10	10.5 mm	17.8 mm	25 mm	63 mm	ASH405	Not Rated	10	3310N42	0000
								1 mm	-0.03 mm to 0.03 mm	M8	9 mm	14.5 mm	20 mm	61 mm	ASH410N	Rockwell B90	10	3310N453	0000


								1 mm	-0.03 mm to 0.03 mm	M10	10.5 mm	17.8 mm	25 mm	63 mm	ASH410	Not Rated	10	3310N43	0000
2 mm								-0.03 mm to 0.03 mm	M8	9 mm	14.5 mm	20 mm	61 mm	ASH420N	Rockwell B90	10	3310N454	0000
2 mm	-0.03 mm to 0.03 mm							M10	10.5 mm	17.8 mm	25 mm	63 mm	ASH420	Not Rated	10	3310N44	0000




		5 Slots

		0.015"	-0.002" to 0.002"					3/8"	13/32"	11/16"	1"	3 1/16"	—	Rockwell B90	1	3310N501	0000


		0.032"	-0.002" to 0.002"					3/8"	13/32"	11/16"	1"	3 1/16"	—	Rockwell B90	1	3310N502	0000
		0.062"	-0.002" to 0.002"					3/8"	13/32"	11/16"	1"	3 1/16"	—	Rockwell B70	1	3310N503	0000
		0.25 mm	-0.03 mm to 0.03 mm					M10	10.5 mm	17.8 mm	25 mm	78 mm	ASH502	Not Rated	10	3310N51	0000
		0.5 mm	-0.03 mm to 0.03 mm					M10	10.5 mm	17.8 mm	25 mm	78 mm	ASH505	Not Rated	10	3310N52	0000
		1 mm	-0.03 mm to 0.03 mm					M10	10.5 mm	17.8 mm	25 mm	78 mm	ASH510	Not Rated	10	3310N53	0000
		2 mm	-0.03 mm to 0.03 mm					M10	10.5 mm	17.8 mm	25 mm	78 mm	ASH520	Not Rated	10	3310N54	0000