Optical Levels | McMaster-Carr

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92 Products

Horizontal-Surface-Mount Tubular Levels

Mount these levels to a table or other horizontal surface and they will indicate when you're level on the horizontal plane.

For technical drawings and 3-D models, click on a part number.

Style A

			Housing					Mounting Holes
Lg.	Dia.	Sensitivity	Material	Color	Vial Material	Mount Type	Mounting Fasteners Included	No. of	Dia.	Ctr.-to-Ctr.		Each
3 3/4"	5/8"	0.001 in./ft., 20 sec./2 mm	Painted Brass	Black	Glass	Screw On	No	2	0.22"	3 1/4"	000000	000000
3 3/4"	5/8"	0.003 in./ft., 1 min./2 mm	Painted Brass	Black	Glass	Screw On	No	2	0.22"	3 1/4"	000000	00000
4 13/16"	5/8"	0.007 in./ft., 2 min./0.1"	Chrome-Plated Brass	Black	Glass	Screw On	No	2	0.19"	4.312"	000000	000000

Style B

			Housing					Mounting Holes
Lg.	Dia.	Sensitivity	Material	Color	Vial Material	Mount Type	Mounting Fasteners Included	No. of	Dia.	Ctr.-to-Ctr.		Each
6 3/8"	13/16"	0 in./ft., 6 sec./2 mm	Painted Brass	Black	Glass	Screw On	No	2	3/8"	5.812"	000000	0000000

Style C

				Housing					Mounting Holes
Lg.	Wd.	Ht.	Sensitivity	Material	Color	Vial Material	Mount Type	Mounting Fasteners Included	No. of	Dia.	Ctr.-to-Ctr.		Each
2 15/16"	9/16"	9/16"	0.033 in./ft., 10 min./0.05"	Anodized Aluminum	Black	Glass	Screw On	No	2	0.15"	2.562"	000000	000000
2 15/16"	9/16"	9/16"	0.033 in./ft., 10 min./0.05"	Plastic	Black	Glass	Screw On	No	2	0.15"	2.562"	000000	00000

Style D

				Housing					Mounting Holes
Lg.	Wd.	Ht.	Sensitivity	Material	Color	Vial Material	Mount Type	Mounting Fasteners Included	No. of	Dia.	Ctr.-to-Ctr.		Each
2 15/16"	9/16"	9/16"	0.157 in./ft., 45 min./0.1"	Plastic	Black	Plastic	Screw On	No	2	0.15"	2.562"	000000	000000

Style E

				Housing					Mounting Holes
Lg.	Wd.	Ht.	Sensitivity	Material	Color	Vial Material	Mount Type	Mounting Fasteners Included	No. of	Dia.	Ctr.-to-Ctr.		Each
3"	9/16"	9/16"	0.157 in./ft., 45 min./0.1"	Plastic	Black	Plastic	Screw On, Magnetic	No	2	0.15"	2.562"	0000000	000000

Style F

				Housing					Mounting Holes
Lg.	Wd.	Ht.	Sensitivity	Material	Color	Vial Material	Mount Type	Mounting Fasteners Included	No. of	Dia.	Ctr.-to-Ctr.		Each
2 3/16"	7/16"	5/16"	0.170 in./ft., 50 min./2 mm	Anodized Aluminum	Black	Glass	Screw On	No	2	0.09"	1.874"	0000000	000000
2 13/16"	7/16"	5/16"	0.170 in./ft., 50 min./2 mm	Chrome-Plated Aluminum	__	Glass	Screw On	No	2	0.09"	1.874"	0000000	00000

Style G

				Housing					Mounting Holes
Lg.	Wd.	Ht.	Sensitivity	Material	Color	Vial Material	Mount Type	Mounting Fasteners Included	No. of	Dia.	Ctr.-to-Ctr.		Each
2 1/2"	1/2"	5/8"	0.003 in./ft., 1 min./2 mm	Powder-Coated Brass	Black	Glass	Screw On	No	2	1/8"	2.187"	0000000	0000000
3 3/8"	5/8"	3/4"	0.003 in./ft., 1 min./2 mm	Powder-Coated Brass	Black	Glass	Screw On	No	2	1/8"	3"	000000	00000

Style H

				Housing					Mounting Holes				Each
Lg.	Wd.	Ht.	Sensitivity	Material	Color	Vial Material	Mount Type	Mounting Fasteners Included	No. of	Dia.	Ctr.-to-Ctr.		1-19	20-Up
2 3/16"	5/8"	5/8"	0.133 in./ft., 38 min./0.1"	Plastic	Clear	Plastic	Screw On	No	2	0.165"	1 11/16"	0000000	00000	00000

Vertical-Surface-Mount Tubular Levels

Mount these levels to a wall or other vertical surface and they will indicate when you're level on the horizontal plane.

For technical drawings and 3-D models, click on a part number.

					Housing					Mounting Holes
	Lg.	Wd.	Ht.	Sensitivity	Material	Color	Vial Material	Mount Type	Mounting Fasteners Included	No. of	Dia.	Ctr.-to-Ctr.		Each
A	1 1/2"	1 1/8"	9/16"	0.140 in./ft., 45 min./0.1"	Painted Brass	Black	Glass	Magnetic	__	__	__	__	0000000	000000
B	2"	13/16"	9/16"	0.035 in./ft., 10 min./2 mm	Powder-Coated Brass	Black	Glass	Screw On	No	2	0.14"	0.312"	0000000	00000
C	4"	1/2"	5/8"	0.044 in./ft., 12 min./0.15"	Powder-Coated Brass	Black	Glass	Screw On	No	2	0.14"	3 5/8"	0000000	00000
D	2"	3/8"	1/2"	0.122 in./ft., 35 min./0.1"	Powder-Coated Brass	Black	Glass	Screw On	No	2	0.13"	1.688"	0000000	00000
E	2"	1/2"	5/8"	0.004 in./ft., 150 sec./0.1"	Powder-Coated Brass	Black	Glass	Screw On	No	2	0.14"	1 5/8"	0000000	00000
F	1 1/4"	1"	5/8"	0.004 in./ft., 150 sec./0.1"	Powder-Coated Brass	Black	Glass	Screw On	No	2	0.16"	0.938"	0000000	00000
G	2"	1"	1/2"	0.035 in./ft., 11 min./2 mm	Powder-Coated Brass	Black	Glass	Screw On	No	2	0.15"	1 5/8"	0000000	00000

Adhesive-Back Horizontal-Surface-Mount Tubular Levels

Stick these levels onto carts, mobile equipment, and other horizontal surfaces to make sure they're level before use. The adhesive backing forms a permanent hold with no drilling or fasteners required.

							White		Black
Lg.	Wd.	Ht.	Sensitivity	Housing Material	Vial Material	Pkg. Qty.		Pkg.		Pkg.
2"	1"	1/4"	Not Rated	Plastic	Plastic	2	0000000	000000	0000000	000000

Surface-Mount High-Temperature Circular Mountable Levels

Be spot-on in all directions of the horizontal plane. Also known as bull's eye levels, these levels have glass vials that resist temperature variations and chemicals.

Style D has a mounting disc that attaches to your surface. The level housing screws onto the mounting disc.

For technical drawings and 3-D models, click on a part number.

								Mounting Holes
Style	Base Dia.	Overall Ht.	No. of Centering Circles	Sensitivity	Housing Material	Vial Material	Mounting Fasteners Included	No. of	Dia.		Each
A	11/16"	5/16"	1	0.453 in./ft., 130 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.07"	000000	000000
A	7/8"	3/8"	1	0.157 in./ft., 45 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.09"	000000	00000
A	1"	7/16"	1	0.157 in./ft., 45 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.09"	000000	00000
A	1 1/4"	7/16"	1	0.157 in./ft., 45 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.12"	000000	00000
A	1 7/16"	1/2"	1	0.070 in./ft., 20 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.12"	000000	00000
A	1 3/4"	5/8"	1	0.035 in./ft., 10 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.12"	000000	00000
A	2 1/4"	11/16"	1	0.035 in./ft., 10 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.14"	000000	00000
A	2 3/4"	11/16"	1	0.035 in./ft., 10 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.14"	000000	000000
B	1"	7/16"	1	0.157 in./ft., 45 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.09"	0000000	00000
B	1 1/4"	7/16"	1	0.157 in./ft., 45 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.12"	0000000	00000
B	1 3/4"	5/8"	1	0.035 in./ft., 10 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.12"	0000000	00000
C	1 7/16"	1/2"	2	0.084 in./ft., 24 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.12"	0000000	00000
C	1 3/4"	5/8"	4	0.003 in./ft., 1 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.12"	0000000	000000
C	2 1/4"	11/16"	4	0.209 in./ft., 60 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.14"	000000	00000
C	2 3/4"	11/16"	3	1.050 in./ft., 300 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.14"	0000000	00000
C	2 3/4"	11/16"	7	0.003 in./ft., 1 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.14"	0000000	000000
C	2 3/4"	11/16"	7	0.105 in./ft., 30 min./0.1"	Chrome-Plated Brass	Glass	No	3	0.14"	0000000	000000
D	13/16"	9/16"	1	0.157 in./ft., 45 min./0.1"	Aluminum	Glass	Yes	1	0.17"	00000000	00000

Magnetic Surface-Mount High-Temperature Circular Mountable Levels

Be spot-on in all directions of the horizontal plane. Also known as a bull's eye level, this level has a glass vial that resists temperature variations and chemicals.

For technical drawings and 3-D models, click on a part number.

Base Dia.	Overall Ht.	No. of Centering Circles	Sensitivity	Housing Material	Vial Material		Each
1"	7/16"	1	0.157 in./ft., 45 min./0.1"	Chrome-Plated Brass	Glass	0000000	000000

Recess-Mount High-Temperature Circular Mountable Levels

Painted Brass

Chrome-Plated Brass

Slip these levels into a drilled hole to level in all directions of the horizontal plane. Also known as bull's eye levels, they have glass vials that resist temperature variations and chemicals.

For technical drawings and 3-D models, click on a part number.

					Housing				Mounting Holes
Base Dia.	For Hole Dia.	Overall Ht.	No. of Centering Circles	Sensitivity	Material	Color	Vial Material	Mounting Fasteners Included	No. of	Dia.		Each
7/8"	47/64"	7/16"	1	0.453 in./ft., 130 min./0.1"	Painted Brass	Black	Glass	__	__	__	00000000	000000
1"	11/16"	3/8"	1	0.157 in./ft., 45 min./0.1"	Chrome-Plated Brass	__	Glass	No	3	0.07"	00000000	00000

Long-Life Circular Surface-Mount Levels

Plastic vials are more durable than glass. Also known as bull's eye levels, these show level in all directions of the horizontal plane.

For technical drawings and 3-D models, click on a part number.

							Mounting Holes
Base Dia.	Overall Ht.	No. of Centering Circles	Sensitivity	Housing Material	Vial Material	Mounting Fasteners Included	No. of	Dia.		Each
3 15/16"	9/16"	4	0.105 in./ft., 30 min./0.1"	Plastic	Plastic	No	3	0.2"	0000000	000000
3 15/16"	9/16"	6	0.133 in./ft., 38 min./0.1"	Plastic	Plastic	No	3	0.2"	0000000	00000
3 15/16"	3/4"	3	0.105 in./ft., 30 min./0.1"	Aluminum	Plastic	No	3	0.2"	0000000	00000
3 15/16"	3/4"	4	0.213 in./ft., 61 min./0.1"	Aluminum	Plastic	No	3	0.2"	0000000	00000

Starrett Multi-Plane Precision Levels

No. 98 Machinist

199Z Master Precision

Check the accuracy of horizontal and vertical surfaces with these precision-machined levels. They have highly sensitive vials set at 90° angles for checking two planes at the same time.

V-groove provides stability on curved surfaces.

Levels
				No. of Vials			Housing							Replacement Horizontal Vials
Lg.	Wd.	Ht.	For Max. No. of Planes	Horizontal	Vertical	Sensitivity	Material	Color	Vial Material	Features	Container Type		Each		Each
No. 98 Machinist
6"	1 1/4"	1 1/2"	2	2	__	0.005 in./ft., 1 min./0.1"	Cast Iron	Black	Glass	V-Groove	__	00000000	0000000	00000000	0000000
8"	1 1/4"	1 5/8"	2	2	__	0.005 in./ft., 1 min./0.1"	Cast Iron	Black	Glass	V-Groove	__	00000000	000000	00000000	000000
12"	1 1/2"	2 3/4"	2	2	__	0.005 in./ft., 1 min./0.1"	Cast Iron	Black	Glass	V-Groove	Carrying Case	00000000	000000	00000000	000000
18"	1 5/8"	2 3/4"	2	2	2	0.005 in./ft., 1 min./0.1"	Cast Iron	Black	Glass	V-Groove	Carrying Case	00000000	000000	0000000	000000
199Z Master Precision
15"	1 5/8"	3"	2	2	__	0.0005 in./ft., 10 sec./0.1"	Cast Iron	Black	Glass	__	__	00000000	00000000	00000000	00000

Starrett Multi-Plane Precision Levels with Calibration Certificate

No. 98 Machinist

199Z Master Precision

These levels come with a calibration certificate traceable to NIST that states they've passed a test for accuracy. They are precision-machined and check the accuracy of both horizontal and vertical surfaces simultaneously with highly sensitive vials set at 90° angles.

V-groove provides stability on curved surfaces.

Levels
				No. of Vials			Housing						Replacement Horizontal Vials
Lg.	Wd.	Ht.	For Max. No. of Planes	Horizontal	Vertical	Sensitivity	Material	Color	Vial Material	Features		Each		Each
No. 98 Machinist
6"	1 1/4"	1 1/2"	2	2	__	0.005 in./ft., 1 min./0.1"	Cast Iron	Black	Glass	V-Groove	000000000	0000000	00000000	0000000
8"	1 1/4"	1 5/8"	2	2	__	0.005 in./ft., 1 min./0.1"	Cast Iron	Black	Glass	V-Groove	000000000	000000	00000000	000000
12"	1 1/2"	2 3/4"	2	2	__	0.005 in./ft., 1 min./0.1"	Cast Iron	Black	Glass	V-Groove	000000000	000000	00000000	000000
18"	1 5/8"	2 3/4"	2	2	2	0.005 in./ft., 1 min./0.1"	Cast Iron	Black	Glass	V-Groove	000000000	000000	0000000	000000
199Z Master Precision
15"	1 5/8"	3"	2	2	__	0.0005 in./ft., 10 sec./0.1"	Cast Iron	Black	Glass	__	000000000	00000000	00000000	00000

Starrett Precision Levels

With a precision-machined leveling surface and highly sensitive vial, this level provides superior accuracy. The V-groove provides stability on curved surfaces.

Levels										Replacement Horizontal Vials
Lg.	Wd.	Ht.	Sensitivity	No. of Horizontal Vials	Housing Material	Vial Material	Features		Each		Each
No. 98 Machinist
4"	7/8"	1 1/8"	0.015 in./ft., 4 min./0.1"	1	Cast Iron	Glass	V-Groove	00000000	0000000	00000000	0000000

Starrett Precision Levels with Calibration Certificate

This level comes with a calibration certificate traceable to NIST that states it's passed a test for accuracy. It has a precision-machined leveling surface and a highly sensitive vial. The V-groove provides stability on curved surfaces.

Levels										Replacement Horizontal Vials
Lg.	Wd.	Ht.	Sensitivity	No. of Horizontal Vials	Housing Material	Vial Material	Features		Each		Each
No. 98 Machinist
4"	7/8"	1 1/8"	0.015 in./ft., 4 min./0.1"	1	Cast Iron	Glass	V-Groove	000000000	0000000	00000000	0000000

Multi-Plane Levels

Two-Plane Plastic T

Two-Plane Aluminum T

Two-Plane Cast Iron L

Two-Plane Brass L

Adjust a surface into a level position on multiple planes.

Two-plane levels have two vials set at 90° angles to allow you to level in two directions simultaneously.

				No. of Vials			Housing				Mounting Holes
For Max. No. of Planes	Lg.	Wd.	Ht.	Horizontal	Vertical	Sensitivity	Material	Color	Vial Material	Mounting Fasteners Included	No. of	Dia.		Each
T
2	1 7/8"	1 1/2"	0.512"	1	1	0.140 in./ft., 40 min./0.1"	Plastic	Black	Plastic	No	2	5/32"	0000000	00000
2	2 1/4"	2"	1/2"	1	1	0.014 in./ft., 4 min./0.1"	Aluminum	Green	Glass	No	2	5/32"	0000000	00000
L
2	2 3/4"	5/8"	2 3/4"	1	1	0.065 in./ft., 19 min./0.1"	Cast Iron	Black	Glass	__	__	__	0000000	00000
2	3"	2"	3/4"	2	1	0.090 in./ft., 27 min./0.1"	Brass	__	Glass	__	__	__	0000000	00000

Level Vials

Replace broken vials in tools or equipment.

Circular plastic vial with one centering circle can be used with an optional mounting flange (sold separately). Mounting flange requires three 1/8" diameter flat head screws.

Tubular vials between 5/16" and 3/8" diameter can snap into an optional mounting flange (sold separately) and attach to any surface with adhesive or a fastener (not included).

Circular

Circular Plastic Vial with One Centering Circle (Shown with Optional Mounting Flange)

Circular Plastic Vial with One
Centering Circle (Shown with
Optional Mounting Flange)

Circular Plastic Vial with Two Centering Circles

Circular Glass Vial

						Optional Mounting Flanges
Vials							Mounting Holes
Base Dia.	Overall Ht.	No. of Centering Circles	Sensitivity		Each	Mounting Fasteners Included	No. of	Dia.		Each
Plastic
5/8"	5/16"	1	0.140 in./ft., 40 min./0.1"	0000000	00000	No	3	1/8"	0000000	00000
1 3/8"	9/16"	2	0.140 in./ft., 40 min./0.1"	0000000	0000	__	__	__	000000	00
Glass
3/8"	3/16"	1	0.453 in./ft., 130 min./0.1"	0000000	00000	__	__	__	000000	00
1/2"	3/16"	1	0.157 in./ft., 45 min./0.1"	0000000	00000	__	__	__	000000	00
5/8"	1/4"	1	0.157 in./ft., 45 min./0.1"	0000000	00000	__	__	__	000000	00
3/4"	5/16"	1	0.157 in./ft., 45 min./0.1"	0000000	00000	__	__	__	000000	00
7/8"	5/16"	1	0.070 in./ft., 20 min./0.1"	0000000	00000	__	__	__	000000	00
1"	5/16"	1	0.035 in./ft., 10 min./0.1"	0000000	00000	__	__	__	000000	00
1 1/2"	3/8"	1	0.035 in./ft., 10 min./0.1"	0000000	00000	__	__	__	000000	00
2"	3/8"	1	0.035 in./ft., 10 min./0.1"	0000000	00000	__	__	__	000000	00

Tubular

Tubular Vial

Vials							Optional Mounting Flanges
					Each			Mounting Holes			Each
Lg.	Dia.	Sensitivity	Pitch Increments		1-19	20-Up	Mounting Fasteners Included	No. of	Dia.		1-19	20-Up
Plastic
5/8"	1/4"	0.160 in./ft., 46 min./0.1"	__	0000000	00000	00000	__	__	__	000000	00	00
7/8"	5/16"	0.160 in./ft., 45 min./0.1"	__	0000000	0000	0000	No	1	1/8"	0000000	00000	00000
1"	3/8"	0.20 in./ft., 60 min./0.1"	__	0000000	0000	0000	No	1	1/8"	0000000	0000	0000
1 3/8"	3/8"	0.133 in./ft., 38 min./0.1"	__	0000000	0000	0000	No	1	1/8"	0000000	0000	0000
1 9/16"	3/8"	0.13 in./ft., 28 min./0.1"	1/8" per ft.	0000000	0000	0000	No	1	1/8"	0000000	0000	0000
1 9/16"	3/8"	0.133 in./ft., 38 min./0.1"	__	0000000	0000	0000	No	1	1/8"	0000000	0000	0000
1 3/4"	3/8"	0.133 in./ft., 38 min./0.1"	__	0000000	0000	0000	No	1	1/8"	0000000	0000	0000
2"	7/16"	0.133 in./ft., 38 min./0.1"	__	0000000	00000	00000	__	__	__	000000	00	00

Rectangular

Rectangular Vial

					Each
Lg.	Wd.	Dp.	Sensitivity		1-19	20-Up
Plastic
1 1/8"	7/16"	7/16"	0.15 in./ft., 44 min./0.1"	0000000	00000	00000
1 9/16"	5/8"	5/8"	0.15 in./ft., 44 min./0.1"	0000000	0000	0000