Thread Plug and Ring

Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.

The user of the thread plug gages should ensure that the correct major diameter, TPI/pitch, Class of fit, and any special pitch diameters are clearly specified. The user should also confirm that the gages conform to the proper {N.I.S.T.}national or international standard.

The go thread plug gage should engage the internal threaded part with very little force used. The engagement should be smooth. There is no specification regarding torque or pounds of pressure for using thread plug gages. Common sense should be applied based on factors of thread size, pitch, and application. If the gage starts to bind, the inspector should stop before damaging the part or the gage. The part may be undersized or tapered. Other possibilities include lead error or a damaged thread. With fine threads the inspector should be careful to not cross thread the parts. It is important to use the no go gage as it checks pitch diameter exclusively. It is unaffected by other conditions in the screw thread as it is intentionally truncated on the crests and with greater clearance applied on the roots of the thread. The no go thread plug should not enter the part more than 3 turns although in practice it is advisable to limit the amount of turns to 1 ½ - 2 turns max. The user just simply counts turns. The end user should review the applicable thread specification in detail as there are variations to the above practice.

All items are new in original manufacturer's packaging {unless otherwise noted}.

They are limited to quantities available.

These items are from manufacturer's overstocks, distributors who have changed products lines and manufacturer's who have had print changes and no longer have a particular job in house where items where used.

Visuals are actual item{s}
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thrd plg gage 2-56 no go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$12.50
thrd plg gage 4-40 go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$12.50
thrd plg gage 6-32 go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$12.50
thrd plg gage 8-32 go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$12.50
thrd plg gage 10-32 go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$12.50
thrd plg gage 10-32 no go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$12.50
thrd plg gage 3/8-16 go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$12.50
thrd ring gage 5/16=18 3a
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$20.00
thrd plg gage 2-56 sti go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 2-56 sti no go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 4-40 sti go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 4-40 sti no go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 6-32 sti no go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 8-32 sti go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 8-32 sti no go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 10-32 sti no go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 1/4-20 go sti
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 1/4-20 no go sti
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 3/8-24 no go sti
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 3/8-24 go sti
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 1-8 no go
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$22.00
thrd wire set 28 pitch
Applications = To measure pitch diameter on thread gages and threaded parts.
$28.00
thrd wire set 13 pitch
Applications = To measure pitch diameter on thread gages and threaded parts.
$28.00
thrd plg gage 2-56 no go
Thread Plug Gage 2-56 NO GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Thread Plug Gage )

Diameter and Pitch = 2-56

Nib Type = NO GO

Basic Major = .086"

Diameter No Go = .0772" {-.0002"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

P/N = TPG-18931
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$12.50
thrd plg gage 4-40 go
Thread Plug Gage 4-40 GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Thread Plug Gage )

Diameter and Pitch = 4-40

Nib Type = GO

Basic Major = .112"

Diameter Go = .0958" {+.0002"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

P/N = TPG-4257B
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$12.50
thrd plg gage 6-32 go
Thread Plug Gage 6-32 GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Thread Plug Gage )

Diameter and Pitch = 6-32

Nib Type = GO

Basic Major = .136"

Diameter Go = .1177" {+.0003"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

P/N = TPG-1188
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$12.50
thrd plg gage 8-32 go
Thread Plug Gage 8-32 GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Thread Plug Gage )

Diameter and Pitch = 8-32

Nib Type = GO

Basic Major = .164"

Diameter Go = .1437" {+.0003"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

P/N = NB-75 TPG-17752
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$12.50
thrd plg gage 10-32 go
Thread Plug Gage 10-32 GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Thread Plug Gage )

Diameter and Pitch = 10-32

Nib Type = GO

Basic Major = .190"

Diameter Go = .1697" {+.0003"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

P/N = NB-75 TPG-13238
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$12.50
thrd plg gage 10-32 no go
Thread Plug Gage 10-32 NO GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Thread Plug Gage )

Diameter and Pitch = 10-32

Nib Type = NO GO

Basic Major = .190"

Diameter Go = .1736" {-.0003"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

P/N = NB-75 TPG-13239
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$12.50
thrd plg gage 3/8-16 go
Thread Plug Gage 3/8-16 GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Thread Plug Gage )

Diameter and Pitch = 3/8-16

Nib Type = GO

Basic Major = .375"

Diameter Go = .3344" {+.0003"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

P/N = NB-75 TPG-17758
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$12.50
thrd ring gage 5/16=18 3a
Thread Ring Gage 5/16-18 GO Class 3A With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Thread Ring Gage )

Diameter and Pitch = 5/16-18

Ring Type = GO

Basic Major = .3125"

Diameter Go = .2764" {-.0003"}

Class of fit = 3A

N.I.S.T Standard Short Form Cert Comes with this Ring

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

P/N = NB-75 TPG-12906
Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$20.00
thrd plg gage 2-56 sti go
Thread Plug Gage Screw Thread Insert 2-56 GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Screw Thread Insert Thread Plug Gage )

Diameter and Pitch = 2-56

Nib Type = GO

Basic Major = .1092"

Diameter Go = .0976" {+.0002"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

This Nib to gage Tapped Hole, Helical {Heli-Coil} Wire Inserts/ The Screw Thread Insert Proper Not to be Gaged

P/N = NB-75 TPG-17744

Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 2-56 sti no go
Thread Plug Gage Screw Thread Insert 2-56 NO GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Screw Thread Insert Thread Plug Gage )

Diameter and Pitch = 2-56

Nib Type = NO GO

Basic Major = .1036"

Diameter NO Go = .0996" {-.0002"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

This Nib to gage Tapped Hole, Helical {Heli-Coil} Wire Inserts/ The Screw Thread Insert Proper Not to be Gaged

P/N = NB-75 TPG-11067

Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 4-40 sti go
Thread Plug Gage Screw Thread Insert 4-40 GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Screw Thread Insert Thread Plug Gage )

Diameter and Pitch = 4-40

Nib Type = GO

Basic Major = .1445"

Diameter Go = .1283" {+.0002"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

This Nib to gage Tapped Hole, Helical {Heli-Coil} Wire Inserts/ The Screw Thread Insert Proper Not to be Gaged

P/N = TPG-19933

Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 4-40 sti no go
Thread Plug Gage Screw Thread Insert 4-40 NO GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Screw Thread Insert Thread Plug Gage )

Diameter and Pitch = 4-40

Nib Type = NO GO

Basic Major = .1356"

Diameter NO Go = .1308" {-.0001"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

This Nib to gage Tapped Hole, Helical {Heli-Coil} Wire Inserts/ The Screw Thread Insert Proper Not to be Gaged

P/N = TPG-10694

Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 6-32 sti no go
Thread Plug Gage Screw Thread Insert 6-32 NO GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Screw Thread Insert Thread Plug Gage )

Diameter and Pitch = 6-32

Nib Type = NO GO

Basic Major = .1672"

Diameter NO Go = .1611" {-.0001"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

This Nib to gage Tapped Hole, Helical {Heli-Coil} Wire Inserts/ The Screw Thread Insert Proper Not to be Gaged

P/N = TPG-10695

Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 8-32 sti go
Thread Plug Gage Screw Thread Insert 8-32 GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Screw Thread Insert Thread Plug Gage )

Diameter and Pitch = 8-32

Nib Type = GO

Basic Major = .2046"

Diameter Go = .1843" {+.0003"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

This Nib to gage Tapped Hole, Helical {Heli-Coil} Wire Inserts/ The Screw Thread Insert Proper Not to be Gaged

P/N = TPG-12413

Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 8-32 sti no go
Thread Plug Gage Screw Thread Insert 8-32 NO GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Screw Thread Insert Thread Plug Gage )

Diameter and Pitch = 8-32

Nib Type = NO GO

Basic Major = .1932"

Diameter NO Go = .1872" {-.0001"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

This Nib to gage Tapped Hole, Helical {Heli-Coil} Wire Inserts/ The Screw Thread Insert Proper Not to be Gaged

P/N = TPG-10696

Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 10-32 sti no go
Thread Plug Gage Screw Thread Insert 10-32 NO GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Screw Thread Insert Thread Plug Gage )

Diameter and Pitch = 10-32

Nib Type = NO GO

Basic Major = .2193"

Diameter NO Go = .2133" {-.0003"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

This Nib to gage Tapped Hole, Helical {Heli-Coil} Wire Inserts/ The Screw Thread Insert Proper Not to be Gaged

P/N = TPG-13873

Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 1/4-20 go sti
Thread Plug Gage Screw Thread Insert 1/4-20 GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Screw Thread Insert Thread Plug Gage )

Diameter and Pitch = 1/4-20

Nib Type = GO

Basic Major = .3150"

Diameter Go = .2825" {+.0003"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

This Nib to gage Tapped Hole, Helical {Heli-Coil} Wire Inserts/ The Screw Thread Insert Proper Not to be Gaged

P/N = TPG-16766

Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 1/4-20 no go sti
Thread Plug Gage Screw Thread Insert 1/4-20 NO GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Screw Thread Insert Thread Plug Gage )

Diameter and Pitch = 1/4-20

Nib Type = NO GO

Basic Major = .2963"

Diameter NO Go = .2864" {-.0003"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

This Nib to gage Tapped Hole, Helical {Heli-Coil} Wire Inserts/ The Screw Thread Insert Proper Not to be Gaged

P/N = TPG-16767

Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 3/8-24 no go sti
Thread Plug Gage Screw Thread Insert 3/8-24 NO GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Screw Thread Insert Thread Plug Gage )

Diameter and Pitch = 3/8-24

Nib Type = NO GO

Basic Major = .4140"

Diameter NO Go = .4059" {-.0003"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

This Nib to gage Tapped Hole, Helical {Heli-Coil} Wire Inserts/ The Screw Thread Insert Proper Not to be Gaged

P/N = TPG-17749

Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 3/8-24 go sti
Thread Plug Gage Screw Thread Insert 3/8-24 GO Class 2B With N.I.S.T. Short Form Cert Mercury Gage U.S.A. (Screw Thread Insert Thread Plug Gage )

Diameter and Pitch = 3/8-24

Nib Type = GO

Basic Major = .4291"

Diameter Go = .4020" {+.0001"}

Class of fit = 2B

N.I.S.T Standard Short Form Cert Comes with this No Go Nib

Handle not Included

Manufacturer = Mercury Gage {Detroit, Michigan}

This Nib to gage Tapped Hole, Helical {Heli-Coil} Wire Inserts/ The Screw Thread Insert Proper Not to be Gaged

P/N =TPG-19643

Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$15.00
thrd plg gage 1-8 no go
Thread Plug Gage 1-8 2B No Go Class X Cleveland Twist USA (Screw Thread Insert Thread Plug Gage )

Diameter and Pitch = 1-8

Nib Type = No Go

Hi Pitch Diameter = .9276"

Class = "X"

Class of fit = 2B

No Cert comes with this item

Handle not Included

Manufacturer = Cleveland Twist Drill

This Nib to gage Tapped Hole

P/N = NB-75 68693

Applications = Thread Plug Gages also referred to as Thread Plug Gauges are used to check inside major diameter and pitch diameter limits on threaded parts.
$22.00
thrd wire set 28 pitch
Thread Measuring Wire 28 Pitch 60 Degree 3 piece set With Short Form Cert Cleveland Twist Drill (Thread Wire)

Pitch Diameter = 28 Threads Per Inch

For measuring 60 Degree Threads

Nominal Wire Diameter = .02062"

Measurement over wires Minus .03093" for zero lead angle

N.I.S.T Standard Short Form Cert

3 Wires Per Set

Manufacturer = Cleveland Twist Drill

P/N = NB-75 76263

There is a heavy duty plastic protective case with a metal cover within the case You see in picture and the Short form cert is located here
Applications = To measure pitch diameter on thread gages and threaded parts.
$28.00
thrd wire set 13 pitch
Thread Measuring Wire 13 Pitch 60 Degree 3 piece set With Short Form Cert Cleveland Twist Drill (Thread Wire)

Pitch Diameter = 13 Threads Per Inch

For measuring 60 Degree Threads

Nominal Wire Diameter = .04441"

Measurement over wires Minus .06661" for zero lead angle

N.I.S.T Standard Short Form Cert

3 Wires Per Set

Manufacturer = Cleveland Twist Drill

P/N = NB-75 76254

There is a heavy duty plastic protective case with a metal cover within the case You see in picture and the Short form cert is located here
Applications = To measure pitch diameter on thread gages and threaded parts.
$28.00
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