Starrett Center Finders | McMaster-Carr

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EAR99

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89 Products

Starrett Edge Finders


Style A	Style B

Locate edges, shoulders, center points, and lines on your workpiece.

Style	Tip Shape (Tip Dia.)	Body Dia.	Overall Lg.	Mfr. Model No.	Material		Each
A	Barrel (0.2")	3/8"	2 1/2"	827A	Steel	20535A653	000000
A	Barrel (6 mm)	10 mm	3 1/8"	827MA	Steel	20535A681	00000
B	Barrel (0.2"), Point	1/2"	3 5/16"	827B	Steel	20535A654	00000

Starrett High-Accuracy Combination Square Heads

Attach to Starrett High-Accuracy Combination Square Blades with the included lockbolts.

Center Heads

Center heads identify the center on pipes, rods, and shafts.

Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc alloy heads.

Hardened Steel—Hardened steel heads are more durable and last longer than cast iron heads.

	Cast Iron		Hardened Steel
For Blade Lg.		Each		Each
4"	1955A17	000000	1955A21	000000
6"	1955A18	00000	1955A22	000000
12" to 48"	1955A19	00000	1955A23	000000

Replacement Square Head Lockbolts

For Head Style	For Blade Lg.		Each
Center, Square	4"	1955A81	000000
Center, Square	6"	1955A82	00000
Center	6"	1955A85	00000
Center, Square, Protractor	12" to 36"/300 mm to 600 mm	1955A83	0000

Edge Scribing Compasses

Mark and transfer distances from the outer edge of an object. An offset divider leg with adjustable point sits on the surface of an object while the outside-caliper style leg reaches around the edge.

Mfr. Model No.		Each







Steel

10 5/8"	6"	Scribing Point	243-6	1963A36	000000

Threads per Inch and Center Identifiers

Identify threads per inch on external threads and find the center of your workpiece to line up thread-cutting tools. This identifier has a corrosion-resistant satin-chrome finish that reduces glare.

	For Threads per In.	Lg.	Wd.	Thk.	Mfr.	Mfr. Model No.	Appearance		Each
Inch







	Chrome-Plated Steel

	Screws, Bolts, Threaded Rods	UNC/UNF	External	14, 20, 24, 32	2 1/4"	3/4"	3/64"	Starrett	C391	Satin	2072A11	000000

Starrett Swiveling Machine Tool Indicator Tip Sets

Determine tool spindle position in relation to work surface, layout lines, holes, and slots. Also known as wiggler sets. Attachments are interchangeable.

Includes	Material		Each
0.10" Diameter Disc Contact, 0.25" Ball Contact, Chuck, Needle Point, Offset Indicator Holder	Steel	8632A72	000000

Starrett Spring-Impact Center Punches


Steel Handle	Aluminum Handle	Aluminum Handle with Self-Centering Sleeve

With an internal spring mechanism, these punches offer one-hand operation when marking hole centers. Turn the handle cap to adjust from light to heavy punching force. Press down on the punch handle to mark hole centers.

Self-Centering Sleeve—Punch with self-centering sleeve automatically centers the point in the hole.

	Lg.	Mfr. Model No.	Punch Material	Handle Shape	Grip Texture	Features		Each
Steel Handle



	1/64"	5 1/4"	18C	Steel	Round	Knurled	—	3422A3	000000


	1/16"	4"	18AA	Steel	Round	Knurled	—	3422A5	00000
	1/16"	5"	18A	Steel	Round	Knurled	—	3422A1	00000


	Aluminum Handle



			1/64"	5"	818	Steel	Round	Knurled	—	34225A65	00000


			1/64"	5"	819	Steel	Round	Knurled	Self-Centering Sleeve	3497A11	00000

Center Punch Replacement Parts

	Mfr. Model No.	For Mfr. Model No.		Each
Caps



		02945-0	18C	3422A315	000000


		02946-0	18AA	3422A517	00000
		13752-0	18A	3422A117	0000


		Hammer Springs



				PT02972	18C	3422A314	0000


				PT13766	18AA	3422A516	0000
				PT13796	18A	3422A116	0000


				Hammers



						13764-0	18AA	3422A515	0000


						PT09929	18A, 818, 819	3422A115	0000
						PT13815	18C	3422A313	00000


						Handles



								13751-0	18A	3422A112	00000


								13757-0	18C	3422A312	00000


								Points



										PT06689	18AA	3422A61	00000


										PT06690	18A	3422A62	00000
										PT09966	819	3497A12	00000
										PT22256	18C, 818	34225A66	00000


										Retaining Rings



												11445-0	819	3497A14	0000


												Shanks



PT13767	18C													3422A317	00000


PT13768	18A													3422A118	0000
PT13774	18AA													3422A519	00000


Sleeves



		09962-0												819	3497A13	00000


		Tips



														13750-0	18A	3422A111	00000


														13761-0	18AA	3422A511	00000
														22278-0	18C	3422A64	00000
				PT09923										818	3422A12	00000


				Trip Pin Springs



														PT13756	18A, 18C, 818, 819	3422A114	0000


														PT13765	18AA	3422A514	0000


						Trip Pins



														PT13753	18A, 18C, 818, 819	3422A113	00000


														PT13762	18AA	3422A513	0000

Starrett High-Accuracy Combination Squares

Replace your try square, miter square, depth gauge, height gauge, center-point finder, and level. The blade on these squares meets Fed. Spec. GGG-R-791H, which establishes uniform standards for accuracy, graduations, and size. Blades are labeled with numeric increments that are less than 1" for quick reading.

Blades with Square Head and Center Head


	Inch

Square head checks 90° angles.

Center head identifies the center on pipes, rods, and shafts.

Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.

Etched—Etched graduation marks are wear resistant.

					Blade					Graduation		Cast Iron Square Head
	Blade Lg.	Front Graduations (Numeric Graduations)	Back Graduations (Numeric Graduations)	Lg. Accuracy	Wd.	Thk.	Material	Appearance	Color	Color	Type	Head Lg.		Each
Inch



		4"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.002" to 0.004"	5/8"	1/16"	Steel	Satin	Chrome, Silver	Black	Etched	2 1/4"	2108A11	0000000

Replacement Square Head Lockbolts

		Each
Replacement Lockbolt for Square and Center Heads	1955A81	000000

Blades with Square Head with Built-In Level, Center Head, and Scriber


	Inch

Square head checks 90° angles.

Center head identifies the center on pipes, rods, and shafts.

Hardened Steel Square Head—Hardened-steel square heads are more durable and last longer than cast iron square heads.

Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.

Etched—Etched graduation marks are wear resistant.

					Blade					Graduation		Cast Iron Square Head			Hardened Steel Square Head
	Blade Lg.	Front Graduations (Numeric Graduations)	Back Graduations (Numeric Graduations)	Lg. Accuracy	Wd.	Thk.	Material	Appearance	Color	Color	Type	Head Lg.		Each	Head Lg.		Each
Inch



		6"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.002" to 0.004"	3/4"	5/64"	Steel	Satin	Chrome, Silver	Black	Etched	—	———	0	2 13/32"	2107A12	0000000


		12"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.005"	1"	3/32"	Steel	Satin	Chrome, Silver	Black	Etched	4 1/2"	2108A13	0000000	3 5/8"	2107A13	000000

Replacements for Squares

		Each
Replacement Case for Combination Squares with 12" Long Blade	4264N11	0000000
Replacement Lockbolt for Center Heads	1955A85	00000
Replacement Lockbolt for Square and Center Heads	1955A82	00000
Replacement Lockbolt for Square, Center, and Protractor Heads	1955A83	0000

Blades with Square Head with Built-In Level, Center Head, Protractor Head, and Scriber


	Inch

Square head checks 90° angles.

Protractor head measures angles.

Center head identifies the center on pipes, rods, and shafts.

Etched—Etched graduation marks are wear resistant.

					Blade				Graduation		Cast Iron Square Head
	Blade Lg.	Front Graduations (Numeric Graduations)	Back Graduations (Numeric Graduations)	Lg. Accuracy	Wd.	Thk.	Material	Color	Color	Type	Head Lg.		Each
Inch



		12"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.005"	1"	3/32"	Steel	Silver	Black	Etched	4 1/2"	2108A57	0000000


		24"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.007"	1"	3/32"	Steel	Silver	Black	Etched	4 1/2"	2108A59	000000

Replacements for Squares

Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber


	Inch/Metric

Inch

Square head checks 90° angles.

Protractor head measures angles.

Center head identifies the center on pipes, rods, and shafts.

Hardened Steel Square Head—Hardened-steel square heads are more durable and last longer than cast iron square heads.

Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.

Etched—Etched graduation marks are wear resistant.

					Blade					Graduation		Cast Iron Square Head			Hardened Steel Square Head
	Blade Lg.	Front Graduations (Numeric Graduations)	Back Graduations (Numeric Graduations)	Lg. Accuracy	Wd.	Thk.	Material	Appearance	Color	Color	Type	Head Lg.		Each	Head Lg.		Each
Inch



		12"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.005"	1"	3/32"	Steel	—	Silver	Black	Etched	4 1/2"	2108A51	0000000	—	———	0


		12"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.005"	1"	3/32"	Steel	Satin	Chrome, Silver	Black	Etched	—	———	0	3 5/8"	2107A51	0000000
		12"	1/32" (4/32"), 1/64" (8/64")	1/50" (1/10"), 1/100" (1/10")	-0.0035" to 0.005"	1"	3/32"	Steel	—	Silver	Black	Etched	4 1/2"	2108A54	000000	—	———	0
		12"	1/32" (4/32"), 1/64" (8/64")	1/50" (1/10"), 1/100" (1/10")	-0.0035" to 0.005"	1"	3/32"	Steel	Satin	Chrome, Silver	Black	Etched	—	———	0	3 5/8"	2107A54	000000
		24"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.007"	1"	3/32"	Steel	—	Silver	Black	Etched	4 1/2"	2108A53	000000	—	———	0
		24"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.007"	1"	3/32"	Steel	Satin	Chrome, Silver	Black	Etched	—	———	0	3 5/8"	2107A53	000000
		24"	1/32" (4/32"), 1/64" (8/64")	1/50" (1/10"), 1/100" (1/10")	-0.0035" to 0.007"	1"	3/32"	Steel	Satin	Chrome, Silver	Black	Etched	—	———	0	3 5/8"	2107A56	000000


		Inch/Metric



				11 3/4"/300 mm	0.5 mm (10 mm), 1/32" (4/32")	1 mm (10 mm), 1/64" (8/64")	-0.0035" to 0.005"/ -0.09 mm to 0.15 mm	1"	3/32"	Steel	—	Silver	Black	Etched	4 1/2"	2108A55	000000	—	———	0


				11 3/4"/300 mm	0.5 mm (10 mm), 1/32" (4/32")	1 mm (10 mm), 1/64" (8/64")	-0.0035" to 0.005"/ -0.09 mm to 0.15 mm	1"	3/32"	Steel	Satin	Chrome, Silver	Black	Etched	—	———	0	3 5/8"	2107A57	000000

Replacements for Squares

Starrett Center Punches

Also known as center punches, strike these with a hammer to mark hole centers in metal and other materials. Use before drilling to prevent your drill bit from wandering when starting a hole.

				Material
	Point Dia.	Lg.	Mfr. Model No.	Handle	Punch	Grip Texture		Each
Round Handle



		1/16"	3"	117AA	Steel Handle	Steel	Knurled	34155A11	000000


		5/64"	4"	117A	Steel Handle	Steel	Knurled	34155A12	00000
		3/32"	4"	117B	Steel Handle	Steel	Knurled	34155A13	00000
		1/8"	4"	117C	Steel Handle	Steel	Knurled	34155A14	00000
		5/32"	4"	117D	Steel Handle	Steel	Knurled	34155A15	00000
		1/4"	5"	117E	Steel Handle	Steel	Knurled	34155A16	00000


		Square Handle



				1/16"	3"	264A	Steel Handle	Steel	Knurled	34155A21	00000


				5/64"	3 1/2"	264B	Steel Handle	Steel	Knurled	34155A22	00000
				3/32"	3 3/4"	264C	Steel Handle	Steel	Knurled	34155A23	00000
				1/8"	4"	264D	Steel Handle	Steel	Knurled	34155A24	00000
				5/32"	4 1/4"	264E	Steel Handle	Steel	Knurled	34155A25	00000
				3/16"	4 1/2"	264F	Steel Handle	Steel	Knurled	34155A26	00000
				1/4"	5"	264G	Steel Handle	Steel	Knurled	34155A27	00000

Starrett High-Accuracy Combination Square Blades


Inch	Inch/Metric

Use these blades with Starrett High-Accuracy Combination Square Heads. They meet Fed. Spec. GGG-R-791, which establishes uniform standards for accuracy, graduations, and size. Blades are labeled with numeric increments that are less than 1" for quick reading. All have a corrosion-resistant satin chrome-plated finish that reduces glare and wear-resistant etched markings.

								Graduation
	Lg.	Front Graduations (Numeric Graduations)	Back Graduations (Numeric Graduations)	Lg. Accuracy	Wd.	Thk.	Color	Color	Type		Each
Inch







				Satin Chrome-Plated Steel

				4"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.002" to 0.004"	5/8"	1/16"	Silver	Black	Etched	1955A32	000000


				6"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.002" to 0.004"	3/4"	5/64"	Silver	Black	Etched	1955A34	00000
				6"	1/32" (4/32"), 1/64" (8/64")	1/50" (1/10"), 1/100" (1/10")	-0.002" to 0.004"	3/4"	5/64"	Silver	Black	Etched	1955A35	00000
				12"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.005"	1"	3/32"	Silver	Black	Etched	1955A36	00000
				12"	1/32" (4/32"), 1/64" (8/64")	1/50" (1/10"), 1/100" (1/10")	-0.0035" to 0.005"	1"	3/32"	Silver	Black	Etched	1955A37	000000
				24"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.007"	1"	3/32"	Silver	Black	Etched	1955A41	000000
				24"	1/32" (4/32"), 1/64" (8/64")	1/50" (1/10"), 1/100" (1/10")	-0.0035" to 0.007"	1"	3/32"	Silver	Black	Etched	1955A42	000000
				36"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.007"	1"	3/32"	Silver	Black	Etched	1955A51	000000


				Inch/Metric







								Satin Chrome-Plated Steel

								11 3/4"/300 mm	0.5 mm (10 mm), 1/32" (4/32")	1 mm (10 mm), 1/64" (8/64")	-0.0035" to 0.005"/-0.09 mm to 0.15 mm	1"	3/32"	Silver	Black	Etched	1955A44	000000

Starrett Center Punch Sets


5 Pieces	7 Pieces

Also known as center punches, strike these with a hammer to mark hole centers in metal and other materials. Use before drilling to prevent your drill bit from wandering when starting a hole.

			Material
No. of Pieces	Includes	Mfr. Model No.	Handle	Punch	Handle Shape	Grip Texture		Each
5	Punches with 1/16", 5/64", 3/32", 1/8", 5/32" Point Dia.	S117PC	Steel Handle	Steel	Round	Knurled	34155A41	000000
7	Punches with 1/16", 5/64", 3/32", 1/8", 5/32", 3/16", 1/4" Point Dia.	S264WB	Steel Handle	Steel	Square	Knurled	34155A51	000000