Welding Gauges | McMaster-Carr

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About Pipe Size

About Pressure Gauges

Also known as a fillet gauge, this gauge measures concave and convex corner weld dimensions.

MIG, TIG, Stick, Oxyacetylene Welding Process
Radius Measured	Metric Radius Measured, mm	Measures	Material	Includes		Each
1/8", 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 5/8", 3/4", 7/8", 1"	3, 5, 6, 8, 10, 11, 13, 16, 19, 22, 25	Concave Corners, Convex Corners	Steel	Vinyl Carrying Case	0000000	000000

Multicheck Weld Inspection Gauges

Check bevel angles, excess weld metal (capping size), length of a corner-weld leg, throat length, and depth of undercut.

	Excess Weld Metal (Capping Size)		Corner-Weld Leg Lg.		Throat Lg.		Dp. of Undercut
Bevel Angle Measured	Max. Size Measured	Graduation Marks	Max. Lg. Measured	Graduation Marks	Max. Lg. Measured	Graduation Marks	Max. Size Measured	Graduation Marks	Material	Includes		Each
MIG, TIG, Stick, Oxyacetylene Welding Process
0°-60°	1", 25 mm	1/16", 1 mm	1", 25mm	1/16", 1 mm	3/4", 20mm	1/16", 1 mm	3/16", 5 mm	1/16", 1 mm	Stainless Steel	Vinyl Carrying Case	0000000	0000000

Weld Alignment Inspection Gauges

Measure internal misalignment of pipe ID, pipe wall thickness after tack welding, and go/no-go fit-up gap.

Internal Misalignment of Pipe ID		Pipe Wall Thick. After Tack Welding
Max. Size Measured	Graduation Marks	Max. Thick. Measured	Graduation Marks	Go/No-Go Fit-Up Gap Size Measured Range	Material		Each
MIG, TIG, Stick, Oxyacetylene Welding Process
1/16", 30 mm	1/32", 1 mm	1 3/4", 45mm	1/16", 1 mm	1/16"-3/32"	Stainless Steel	0000000	0000000

Gas Pressure Gauges

Single Scale With Bottom Connection

Dual Scale With Bottom Connection

Dual Scale With Center Back Connection

Dual Scale With Lower Back Connection

Bottom Connection

Center Back Connection

Lower Back Connection

Use these gauges with pumps, filters, regulators, and in process lines to monitor the pressure of compressed gas. Mount them with the dial face upright. Gauges for use with acetylene can also be used in welding applications.

Gauges with brass case are cleaned to meet ASME B40.1, Level IV for oxygen service.

Gauges with 304 stainless steel case are cleaned and bagged to meet ASME B40.1, Level IV for oxygen service.

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

Brass Case with Brass Connection—Single Scale (psi)

For Use With: Air, Acetylene, Carbon Dioxide, and Oxygen
Accuracy: ±2% Mid Scale (Grade B)

Available Pressure Ranges
Pressure Range, psi	Graduation Marks, psi	Numeric Increments, psi
0 to 30	1	5
0 to 60	1	10
0 to 100	2	20
0 to 200	5	40
0 to 400	10	50
0 to 600	10	100
0 to 1,000	20	200
0 to 2,000	50	400
0 to 3,000	50	500
0 to 4,000	100	500

					Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Mounting Orientation		Each
NPT Male
2"	1/4	-40° to 140°	-40° to 140°	Upright	0000000	000000
2 1/2"	1/4	-40° to 140°	-40° to 140°	Upright	0000000	00000

304 Stainless Steel Case with Brass Connection—Dual Scale (psi, kPa)

For Use With: Oxygen
Accuracy: ±1% Mid Scale (Grade A); except
4" Dial Dia.: ±1% Full Scale (Grade 1A)

		Available Pressure Ranges
		Bottom and Center Back Connections				Lower Back Connection
Pressure Range		Graduation Marks		Numeric Increments		Graduation Marks		Numeric Increments
psi	kPa	psi	kPa	psi	kPa	psi	kPa	psi	kPa
2 1/2" Dial Diameter
0 to 15	0 to 102	0.2	2	3	20	__	__	__	__
0 to 30	0 to 205	0.5	5	5	50	__	__	__	__
0 to 100	0 to 680	2	10	20	100	__	__	__	__
0 to 200	0 to 1,350	5	50	50	200	__	__	__	__
0 to 300	0 to 2,050	5	50	50	500	__	__	__	__
0 to 600	0 to 4,100	10	100	100	1,000	__	__	__	__
4" Dial Diameter
0 to 15	0 to 103	0.2	1	3	10	0.2	1	3	10
0 to 30	0 to 206	0.5	2	5	20	0.5	2	5	20
0 to 100	0 to 680	1	10	10	100	1	10	10	100
0 to 200	0 to 1,360	2	20	20	200	2	20	20	200
0 to 300	0 to 2,060	5	20	50	200	5	20	50	200
0 to 600	0 to 4,100	10	50	100	500	10	100	100	1,000

					Bottom Connection		Center Back Connection		Lower Back Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Mounting Orientation		Each		Each		Each
NPT Male
2 1/2"	1/4	-40° to 140°	-40° to 140°	Upright	0000000	000000	0000000	000000	000000	00
4"	1/4	-40° to 140°	-40° to 140°	Upright	0000000	00000	000000	00	0000000	000000

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About Pipe Size

About Pressure Gauges

Corner Weld Inspection Gauges

Multicheck Weld Inspection Gauges

Weld Alignment Inspection Gauges

Gas Pressure Gauges