ACME Plug Gauges | McMaster-Carr

Filter by

Thread Type

System of Measurement

Thread Size

Gauge Measurement Type

Thread Fit

Thread Direction

Hardness

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

REACH

Not Compliant

RoHS

Compliant

Size-Checking Gauge Class

Material

Tool Steel

Forward

How can we improve?

20 Products

Acme Threaded Plug Gauges with Handle

Determine if lead nuts, screw collars, and other parts with internal Acme threads are within tolerance. These gauges are attached to a handle to help you quickly thread or unthread them. All are precisely manufactured to tight tolerances. Instead of replacing the whole tool when a gauge wears down, you can insert a new gauge (not included) into the handle.

A part is within tolerance if it’s easy to thread the go gauge into the part but difficult to thread the no-go gauge more than two turns.

Go gauges check the minimum internal thread size. No-go gauges check the maximum internal thread size.

Thread fit designates the tightness or looseness of mating threads. 2G is standard for Acme threads.

Go Gauges
Thread Size	Hardness	Material	Features	For Thread Fit	Pitch Dia. Tolerance		Each
Class X
1/4"-16	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	0" to 0.0003"	000000000	0000000
3/8"-12	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	0" to 0.0003"	000000000	000000
1/2"-10	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	0" to 0.0004"	000000000	000000
5/8"-8	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	0" to 0.0004"	000000000	000000
3/4"-5	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	0" to 0.0004"	000000000	000000
3/4"-6	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	0" to 0.0004"	000000000	000000
1"-4	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	0" to 0.0004"	000000000	000000
1"-5	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	0" to 0.0004"	000000000	000000
1"-10	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	0" to 0.0004"	000000000	000000
1 1/4"-5	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	0" to 0.0004"	000000000	000000
No-Go Gauges
Class X
1/4"-16	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	-0.0003" to 0"	000000000	000000
3/8"-12	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	-0.0003" to 0"	000000000	000000
1/2"-10	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	-0.0004" to 0"	000000000	000000
5/8"-8	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	-0.0004" to 0"	000000000	000000
3/4"-5	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	-0.0004" to 0"	000000000	000000
3/4"-6	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	-0.0004" to 0"	000000000	000000
1"-4	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	-0.0004" to 0"	000000000	000000
1"-5	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	-0.0004" to 0"	000000000	000000
1"-10	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	-0.0004" to 0"	000000000	000000
1 1/4"-5	Rockwell C60	Tool Steel	Taperlock Handle	Class 2G	-0.0004" to 0"	000000000	000000