Product Details
Series RU016

4 Pass Threaded Shaft Rotary Unions

Rotary Systems’ multi-purpose 4-passage rotary unions feature threaded shaft connections, a recessed hardened and ground shaft, a through bore to accommodate electrical slip rings, deep groove radial contact ball bearings and carbon fiber impregnated Teflon Seals.

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Max. Hydraulic Pressure7,000 PSI
Max. Air Pressure250 PSI
Max. Vacuum Pressure28" Hg
Max. Temperature225° F

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Speed vs. Pressure

rotary union ru012 speed vs. pressure chart tall


  • Material
    Choose based on application. Hastelloy and Super-Duplex Stainless available.

  • rotary union bearing covers modification

    Bearing Covers
    Additional bearing protection for harsh environments.

  • Shaft Extension rotary union modification

    Shaft Extension
    Couples rotary union to drive or driven machinery. 1/8" keyway.

  • Slip Rings
    Pass power, signal, and data with 24" long leads up to 10 amps per circuit.

  • Threads
    All common thread types available.


Part #A ThreadB LengthC Diameter
Part #10050-1604-000A Thread0.125 NPTB Length4.103C Diameter2.200 Download Drawing
Part #10051-1604-000A Thread0.250 NPTB Length4.884C Diameter2.700 Download Drawing
Part #10052-1604-000A Thread0.375 NPTB Length6.010C Diameter2.950 Download Drawing
Part #10053-1604-000A Thread0.500 NPTB Length6.765C Diameter3.450 Download Drawing
Part #10054-1604-000A Thread0.750 NPTB Length9.112C Diameter4.450 Download Drawing
Part #10055-1604-000A Thread1.000 NPTB Length10.458C Diameter5.450 Download Drawing

If you are interested in seeing drawings for multiple parts, please contact us. We can help you find products that meet your needs and can send you multiple prints.