AETNA PART NO. | Description | Wt. Per 100 (Pounds) |
---|---|---|
312-12 | 5/16" Dia. x 12" Long | 27 |
312-24 | 5/16" Dia. x 24" Long | 53 |
312-36 | 5/16" Dia. x 36" Long | 80 |
312-48 | 5/16" Dia. x 48" Long |
105 |

Connecting rods and control arms for HVAC systems are designed for damper control accessories, which include swivels, crank arms, and even custom linkage motion control assemblies. Aetna's HVAC connecting arms & rods have a wide range of grades, materials, and sizes.
To view all applicable industries & applications for connecting rods & control arms, please click here!
HVAC Damper control rods are available in threaded and unthreaded versions for use in control applications with linkage components, control swivels, ball joints, rod ends, and in custom linkage motion control applications. HVAC damper control rods are available in threaded versions, various material grades, lengths, shaped designs, hardened, larger diameters, and numerous coatings. Control arms can be designed and assembled per print specifications with rod ends or ball joints for custom linkage assemblies upon request.
Damper control arms have an adjustable Vernier scale for use in control applications with linkage components, control swivels, ball joints, rod ends, and in custom linkage motion control assemblies.
AETNA PART NO. | Description | Wt. Per 100 (Pounds) |
---|---|---|
312-12 | 5/16" Dia. x 12" Long | 27 |
312-24 | 5/16" Dia. x 24" Long | 53 |
312-36 | 5/16" Dia. x 36" Long | 80 |
312-48 | 5/16" Dia. x 48" Long |
105 |
AETNA PART NO. | Description | Bore Diameter | Wt. Per 100 (Pounds) |
---|---|---|---|
CAS-375 | Short Crank Arm for 3/8" Shaft | .385/.389 | 16.7 |
CAS-437 | Short Crank Arm for 7/16" Shaft | .448/.452 | 16.1 |
CAS-500 | Short Crank Arm for 1/2" Shaft | .510/.514 | 15.6 |
CAL-375 | Long Crank Arm for 3/8" Shaft | .385/.389 | 19.0 |
CAL-437 | Long Crank Arm for 7/16" Shaft | .448/.452 | 19.4 |
CAL-500 | Long Crank Arm for 1/2" Shaft | .510/.514 |
17.9 |
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