With endless applications and materials to test, comes the need for grips, fixtures, and connections of all sizes. The following page takes a comprehensive look at the various connection types that Instron has to offer and provides an organized view to understand and select the couplings and adapters needed for your application.

Need help finding the right coupling or adapter? Check our Compatibility Guide to learn about the various types of clevis interfaces commonly found on Instron's electromechanical systems. Please contact us if you have any questions.




Rigid Clevis to Clevis Adapters
Clevis to clevis adapters are used for grip and fixture connections that have a larger or smaller clevis than the load cell or machine adapter.


Available Models
End 1 End 2 Connection Type Catalog No.
Male - Type OO
(6 mm connection with 2.5 mm clevis pin)
Female - Type O
(12 mm connection with 6 mm clevis pin)
Rigid 2501-350
Male - Type OO
(6 mm connection with 2.5 mm clevis pin)
Female - Type C
(5/8 in. connection with 1/4 in. clevis pin)
Rigid S1-13807
Male - Type O
(12 mm connection with 6 mm clevis pin)
Female - Type B
(1/2 in. connection with 3/16 in. clevis pin)
Rigid 2501-134
Male - Type O
(12 mm connection with 6 mm clevis pin)
Female - Type C
(5/8 in. connection with 1/4 in. clevis pin)
Rigid 2501-133
Male - Type O
(12 mm connection with 6 mm clevis pin)
Female - Type D
(1.25 in. connection with 1/2 in. clevis pin)
Rigid 2501-093
Male - Type D
(1.25 in. connection with 1/2 in. clevis pin)
Female - Type O
(12 mm connection with 6 mm clevis pin)
Rigid 2501-346
Male - Type D
(1.25 in. connection with 1/2 in. clevis pin)
Female - Type B
(1/2 in. connection with 3/16 in. clevis pin)
Rigid 2501-119
Male - Type D
(1.25 in. connection with 1/2 in. clevis pin)
Female - Type C
(5/8 in. connection with 1/4 in. clevis pin)
Rigid 2501-120
Male - Type D
(1.25 in. connection with 1/2 in. clevis pin)
Female - Type 1
(34 mm connection with 16 mm clevis pin)
Rigid 2501-338
More Info
 





Flexible Clevis to Clevis Adapters
Clevis to clevis adapters are used for grip and fixture connections that have a larger or smaller clevis than the load cell or machine adapter. Flexible adapters are used for some applications for the alignment of specimens.


Available Models
End 1 End 2 Connection Type Catalog No.
Male - Type OO
(6 mm connection with 2.5 mm clevis pin)
Female - Type B
(1/2 in. connection with 3/16 in. clevis pin)
Flexible 2501-115
Male - Type OO
(6 mm connection with 2.5 mm clevis pin)
Female - Type C
(5/8 in. connection with 1/4 in. clevis pin)
Flexible 2501-157
Male - Type O
(12 mm connection with 6 mm clevis pin)
Female - Type O
(12 mm connection with 6 mm clevis pin)
Flexible 2501-348
Male - Type O
(12 mm connection with 6 mm clevis pin)
Female - Type B
(1/2 in. connection with 3/16 in. clevis pin)
Flexible 2501-109
Male - Type O
(12 mm connection with 6 mm clevis pin)
Female - Type C
(5/8 in. connection with 1/4 in. clevis pin)
Flexible 2501-094
Male - Type O
(12 mm connection with 6 mm clevis pin)
Female - Type D
(1.25 in. connection with 1/2 in. clevis pin)
Flexible 2501-091
Male - Type D
(1.25 in. connection with 1/2 in. clevis pin)
Female - Type D
(1.25 in. connection with 1/2 in. clevis pin)
Flexible 2501-356
Male - Type 1
(34 mm connection with 16 mm clevis pin)
Female - Type C
(5/8 in. connection with 1/4 in. clevis pin)
Flexible 2501-170
Male - Type 1
(34 mm connection with 16 mm clevis pin)
Female - Type D
(1.25 in. connection with 1/2 in. clevis pin)
Flexible 2501-090
More Info
 



Clevis to Threaded Adapter


Clevis to Threaded Adapters
Clevis to thread adapters are used for grip and fixture connects on floor model systems when the load cell or machine has a threaded connection.


Available Models
End 1 End 2 Connection Type Catalog No.
Male - Type D
(1.25 in. connection with 1/2 in. clevis pin)
Male - Type I
(M30x2 right hand thread)
Rigid 2501-173
Male - Type D
(1.25 in. connection with 1/2 in. clevis pin)
Male - Type II
(M48x2 right hand thread)
Rigid 2501-172
Male - Type 1
(34 mm connection with 16 mm clevis pin)
Female - Type O
(12 mm connection with 6 mm clevis pin)
Rigid 2501-159
Male - Type 1
(34 mm connection with 16 mm clevis pin)
Female - Type D
(1.25 in. connection with 1/2 in. clevis pin)
Rigid 2501-092
Male - Type 1
(34 mm connection with 16 mm clevis pin)
Male - Type I
(M30x2 right hand thread)
Rigid 2501-073
Male - Type 1
(34 mm connection with 16 mm clevis pin)
Male - Type II
(M48x2 right hand thread)
Rigid 2501-171
Male - Type I
(M30x2 left hand thread)
Female - Type D
(1.25 in. connection with 1/2 in. clevis pin)
Rigid 8005-061
Male - Type II
(M48x2 left hand thread)
Female - Type D
(1.25 in. connection with 1/2 in. clevis pin)
Rigid 8005-062
More Info
 



Threaded to Threaded Adapter


Threaded to Threaded Adapters
Threaded adapters are generally used for grips and fixtures to account for high-capacity testing. They will be needed for most hydraulic load string connections, load strings over 100kN, and for systems with threaded base and load cell connections.


Available Models
End 1 End 2 Connection Type Catalog No.
Male - Type II
(M48x2 left hand thread)
Female - 1.5 in. -12 right hand thread Rigid 2501-206
Male - Type II
(M48x2 left hand thread)
Female - Type I
(M30x2 left hand thread)
Rigid 2501-205
Male - Type II
(M48x2 left hand thread)
Female - 2 in. -12 right hand thread Rigid 8005-022
Male - Type I
(M30x2 left hand thread)
Male - Type I
(M30x2 right hand thread)
Rigid 8005-041
Male - Type I
(M30x2 left hand thread)
Male - Type II
(M48x2 right hand thread)
Rigid 8005-045
Male - Type II
(M48x2 left hand thread)
Male - Type I
(M30x2 right hand thread)
Rigid 8005-046
Male - Type II
(M48x2 left hand thread)
Male - Type II
(M48x2 right hand thread)
Rigid 8005-042
Male - Type IIA
(M72x3 left hand thread)
Male - Type IIA
(M72x3 right hand thread)
Rigid 8005-043
More Info
 





Machine Base Adapters
Machine base adapters are generally used for connecting a grip or fixture to the machine. On machines 10 kN and below, a clevis adapter with a through hole for a screw is used. On 30 kN, 50 kN, and 100 kN machines, a flange adapter with clevis and bolt circle is used. For machines above 100 kN, see the threaded adapter section.


Available Models
End 1 End 2 Connection Type Catalog No.
6 x M10 Bolt Circle Female - Type D
(1.25 in. connection with 1/2 in. clevis pin)
Rigid 2501-113
6 x M10 Bolt Circle Female - Type II
(M48x2 left hand thread)
Rigid 2501-148
More Info