Precision Torque Adapters (PTA)

The AWS line of Precision Torque Adapters feature a range of high accuracy, low uncertainty Square Drive Adapters, Hex Drive Adapters, Keyway to Square Adapters and Annular Transducer Mounting Adapters.

Don't see the torque adapter you're looking for? We also custom design and manufacture unique adapters if you're looking for something specific that's not a part of our range!

The AWS Precision Torque Adapters are designed to improve the accuracy and reduce the uncertainty in your torque applications and calibrations. Our range covers the most commonly used square drive, hex and keyway sizes, and custom dimensions can be accommodated on request. They can be used with a variety of different torque applications and calibration equipment.

You may be able to purchase square and hex drive torque adapters from a local tool supplier, but did you know these greatly increase uncertainties in your torque calibrations, verifications and operations? That's why we design and manufacture our AWS Precision Torque Adapters, to improve the accuracy and reduce the uncertainty in torque applications. They're precision machined from hardened stainless steel to eliminate corrosion, reduce wear, and thus increase the lifetime of the adapters. They are laser engraved for easy and unique identification.

Improve Accuracy and Reduce Uncertainty

The AWS range of Precision Torque Adapters are precision machined to high tolerances to ensure maximum accuracy and minimal uncertainties in your torque application when adapters are required.

Precision Torque Adapter being used for a torque screwdriver in a torque transducer
Torque Adapter on a Norbar torque wrench

Manufactured from Hardened Stainless Steel

AWS Precision Torque Adapters are manufactured from hardened stainless steel to eliminate the risk of corrosion and reduce the wear on the adapters over time, thereby increasing the lifetime of each adapter.

Identification By Size

Each torque adapter is uniquely laser engraved with its part number and sizes, allowing for quick and easy identification. 

AWS Precision Torque Adapter sat atop a wooden container with several other adapters inside
A set of torque adapters in a wooden container

Available As A Set

The AWS Precision Torque Adapters are available as a complete set, including a handy wooden storage box with unique identification for each adapter as shown.

Convert | Export html Table to CSV & EXCEL File

Keyway to Square Torque Adapters

Search magnifying glass
Size Product Number
1/2" Female Square to 35mm Female Key CM136
3/4" Female Square to 35mm Female Key CM137
1" Female Square to 35mm Female Key CM138
1/2" Female Square to 20mm Female Key CM175
Convert | Export html Table to CSV & EXCEL File

Square to Square Torque Adapters

Search magnifying glass
Size Product Number
1/2" Female Square to 3/8" Female Square CM132
3/8" Female Square to 3/8" Female Square CM139
1/4" Female Square to 1/4" Female Square CM140
1/4" Female Square to 3/8" Female Square CM141
1" Female Square to 1.5" Male Square CM142
3/4" Female Square to 1" Male Square CM143
1/2" Female Square to 1" Male Square CM144
3/8" Female Square to 1" Male Square CM145
1" Female Square to 3/4" Male Square CM146
1" Female Square to 1/2" Male Square CM147
1" Female Square to 3/8" Male Square CM148
1" Female Square to 1/4" Male Square CM149
1/4" Female Square to 1" Male Square CM157
3/8" Female Square to 3/4" Male Square CM159
1/2" Female Square to 3/4" Male Square CM160
1/4" Female Square to 1/2" Male Square CM161
3/8" Female Square to 1/2" Male Square CM162
1/4" Female Square to 3/8" Male Square CM163
3/4" Female Square to 1/2" Male Square CM164
3/4" Female Square to 3/8" Male Square CM165
3/4" Female Square to 1/4" Male Square CM166
1/2" Female Square to 3/8" Male Square CM167
1/2" Female Square to 1/4" Male Square CM168
3/8" Female Square to 1/4" Male Square CM169
1.5" Male Square to 3/4" Female Square CM174
1" Male Square to 1" Male Square CM177
1" Male Square to 3/4" Male Square CM178
1" Male Square to 1/2" Male Square CM179
1" Male Square to 3/8" Male Square CM180
1" Male Square to 1/4" Male Square CM181
1.5" Male Square to 1" Female Square CM183
1/2" Female Square to 1/2" Female Square CM184
1/2" Male Square to 3/8" Male Square CM185
3/4" Male Square to 1 & 5/8" Male Square CM186
3.5" Female Square to 3.5" Female Square CM187
3.5" Male Square to 2.5" Female Square CM188
3.5" Male Square to 2.5" Male Square CM189
3.5" Male Square to 3.5" Male Square CM190
Convert | Export html Table to CSV & EXCEL File

Hex to Square Torque Adapters

Search magnifying glass
Size Product Number
1" Female Square to 36mm Female Hex CM105
3/4" Female Square to 36mm Female Hex CM106
1/2" Female Square to 19mm Female Hex CM107
1/4" Female Square to 10mm Female Hex CM108
3/8" Female Square to 10mm Female Hex CM109
3/8" Female Square to 17mm Female Hex CM110
1/2" Female Square to 17mm Female Hex CM111
3/8" Female Square to 19mm Female Hex CM112
3/4" Female Square to 19mm Female Hex CM113
1" Female Square to 1/4" Female Hex CM150
1" Female Square to 6mm Female Hex CM151
1" Female Square to 10mm Female Hex CM152
1" Female Square to 17mm Female Hex CM153
1" Female Square to 19mm Female Hex CM154
1" Female Square to 22mm Female Hex CM155
1" Female Square to 27mm Female Hex CM156
1/4" Male Square to 1/4" Female Hex CM170
3/8" Male Square to 1/4" Female Hex CM171
3/8" Male Square to 1/4" Male Hex CM172
1/4" Male Square to 1/4" Male Hex CM173
1/4" Female Square to 1/4" Male Hex CM176
4mm Female Square to 1/4" Female Hex CM182
1/2" Female Square to 1/4" Male Hex CM191
1/2" Female Square to 1/4" Female Hex CM191
1/4" Female Square to 1/4" Female Hex CM195
Precision Torque Adapter on the drive of a torque screwdriver

Custom Sizes and Types on Request

Don't see the torque adapter you're looking for in the tabs above? We also custom design & manufacture unique torque adapters if you're looking for something specific that's not part of our range. Just get in contact with us to let us know your requirements.

Request a Custom Adapter

Annular Transducer Mounting Adapter

The AWS Annular Transducer Mounting Adapters are bespoke designed to fit any mounting arrangement, and designed to improve the accuracy of calibration results. They can be used to turn one of our high torque Annular Transducers into a high torque Inline Transducer. They are manufactured from hardened steels to high tolerances to increase lifespan of the adapter, and come laser engraved with the model number and size for easy identification.

Annular torque transducer from Advanced Witness Systems
Downloads