Following the recommended torque specifications at Amphenol RF is essential to ensuring reliable electrical performance and long-term mechanical integrity across every RF interconnect in your system. Proper torque creates the optimal mating force between connector interfaces, which directly impacts VSWR, signal continuity, and shielding effectiveness, while preventing issues such as loose connections, intermittent signals, or permanent damage caused by over-tightening. Applying too little torque can lead to poor grounding and increased insertion loss, while excessive torque may deform threads, crack dielectric materials, or reduce connector lifespan.
By closely adhering to the torque values outlined in this guide and referenced in the accompanying table, installers can achieve consistent, repeatable results that protect both connector performance and overall system reliability, particularly in high-frequency and mission-critical applications.
The mating torque for standard connectors can be found on the product category landing page for each of our products in the specifications table section.
| Bulkhead Mounting Torque Specs: |
|
Pounds per inches |
|
| Thread |
Material |
Torque (in. lbs.) |
|
| 1/2-28UNEF-2A |
Phosphor Bronze |
35 |
|
| |
Stainless Steel |
35 |
|
| |
Brass |
30 |
|
| |
Nylon |
5-10 |
|
| 3/8-32UNEF-2A |
Brass |
30 |
|
| |
Phosphor Bronze |
25 |
|
| |
Stainless Steel |
25 |
|
| 5/8-24UNEF-2A |
Brass |
30 |
|
| |
Stainless Steel |
40 |
|
| |
Phosphor Bronze |
30 |
|
| 1/4-36UNS-2A |
Phosphor Bronze |
10 |
|
| |
Stainless Steel |
15 |
|
| |
Brass |
10 |
|
| 11/16-UNEF-2A |
Phosphor Bronze |
60 |
|
| 7/8-20UNEF-2A |
Phosphor Bronze |
70 |
|
| 3/8-32UNEF-2A |
Phosphor Bronze |
25 |
|
| 3/4-20UNEF-2A |
Phosphor Bronze |
45 |
|
| 5/16-32UNEF-2A |
Brass |
15 |
|
| |
Stainless Steel |
|
|
| Back Nut Torque Specs |
|
|
|
| Thread |
Material |
Torque (in. lbs.) |
|
| Type N |
Brass |
30 inch per lbs |
|
| SMA |
Brass |
10 inch per lbs |
|
