Precision Associates, Inc.
Precision Associates, Inc.
3800 North Washington Ave.
Minneapolis, MN 55412-2142
Toll Free: 1-800-394-6590
Local: +1 612-333-7464
Sales: +1 612-334-9190
Fax: 612-342-2417
Email: [email protected]
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What Makes X-Ring Seals Better?
  • Twice the Sealing Surface - Multi-lobed design provides more sealing surfaces than standard O-Rings.
  • Prolonged Seal Life – With multiple seal points, less squeeze is required to provide an effective seal. Less friction and wear will increase seal life and lower maintenance costs.
  • Prevents Spiral Failure - The “X” profile creates a stable seal that is more resistant to rolling in a groove than an O-Ring when used in a dynamic application.
  • Reduced Leakage - Parting lines of X-Ring seals are located in the valley between the lobes away from the critical sealing surface.
  • Better Lubricant Retention - Grooves on the inside and outside diameter of these rings retain lubricant thereby lowering friction and extending packing life.
  • Less Force, Better Seal - Lower breakaway forces and reduced operating pressures make them ideal in reciprocating applications.
  • The Right Fit - X-Rings will fit in standard O-Ring grooves for most applications.
Pile of X-Ring Seals
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Item #

C/S (inches)

C/S Tolerance (±)

I.D. (inches)

I.D. Tolerance (±)

O.D. (REF) (inches)

Nominal C/S (inches)

Nominal I.D. (inches)

Nominal O.D. (inches)

4444-135 N/A 0.103 N/A 0.003 N/A 1.925 N/A 0.017 N/A 2.131 N/A 3/32 N/A 1 15/16 N/A 2 1/8
4444-136 N/A 0.103 N/A 0.003 N/A 1.987 N/A 0.017 N/A 2.193 N/A 3/32 N/A 2 N/A 2 3/16
4444-137 N/A 0.103 N/A 0.003 N/A 2.050 N/A 0.017 N/A 2.256 N/A 3/32 N/A 2 1/16 N/A 2 1/4
4444-138 N/A 0.103 N/A 0.003 N/A 2.112 N/A 0.017 N/A 2.318 N/A 3/32 N/A 2 1/8 N/A 2 5/16
4444-143 N/A 0.103 N/A 0.003 N/A 2.425 N/A 0.020 N/A 2.631 N/A 3/32 N/A 2 7/16 N/A 2 5/8
4444-144 N/A 0.103 N/A 0.003 N/A 2.487 N/A 0.020 N/A 2.693 N/A 3/32 N/A 2 1/2 N/A 2 11/16
4444-145 N/A 0.103 N/A 0.003 N/A 2.550 N/A 0.020 N/A 2.756 N/A 3/32 N/A 2 9/16 N/A 2 3/4
4444-150 N/A 0.103 N/A 0.003 N/A 2.862 N/A 0.022 N/A 3.068 N/A 3/32 N/A 2 7/8 N/A 3 1/16
4444-153 N/A 0.103 N/A 0.003 N/A 3.487 N/A 0.024 N/A 3.693 N/A 3/32 N/A 3 1/2 N/A 3 11/16
4444-154 N/A 0.103 N/A 0.003 N/A 3.737 N/A 0.028 N/A 3.943 N/A 3/32 N/A 3 3/4 N/A 3 15/16
4444-159 N/A 0.103 N/A 0.003 N/A 4.987 N/A 0.035 N/A 5.193 N/A 3/32 N/A 5 N/A 5 3/16
4444-201 N/A 0.139 N/A 0.004 N/A 0.171 N/A 0.005 N/A 0.449 N/A 1/8 N/A 3/16 N/A 7/16
4444-202 N/A 0.139 N/A 0.004 N/A 0.234 N/A 0.005 N/A 0.512 N/A 1/8 N/A 1/4 N/A 1/2
4444-203 N/A 0.139 N/A 0.004 N/A 0.301 N/A 0.005 N/A 0.579 N/A 1/8 N/A 5/16 N/A 9/16
4444-204 N/A 0.139 N/A 0.004 N/A 0.359 N/A 0.005 N/A 0.637 N/A 1/8 N/A 3/8 N/A 5/8
4444-205 N/A 0.139 N/A 0.004 N/A 0.421 N/A 0.005 N/A 0.699 N/A 1/8 N/A 7/16 N/A 11/16
4444-206 N/A 0.139 N/A 0.004 N/A 0.484 N/A 0.005 N/A 0.762 N/A 1/8 N/A 1/2 N/A 3/4
4444-207 N/A 0.139 N/A 0.004 N/A .546 N/A 0.007 N/A 0.824 N/A 1/8 N/A 9/16 N/A 13/16
4444-208 N/A 0.139 N/A 0.004 N/A 0.609 N/A 0.009 N/A 0.887 N/A 1/8 N/A 5/8 N/A 7/8
4444-209 N/A 0.139 N/A 0.004 N/A 0.672 N/A 0.009 N/A 0.950 N/A 1/8 N/A 11/16 N/A 15/16
4444-210 N/A 0.139 N/A 0.004 N/A 0.734 N/A 0.010 N/A 1.012 N/A 1/8 N/A 3/4 N/A 1
4444-211 N/A 0.139 N/A 0.004 N/A 0.796 N/A 0.010 N/A 1.074 N/A 1/8 N/A 13/16 N/A 1 1/16
4444-212 N/A 0.139 N/A 0.004 N/A 0.859 N/A 0.010 N/A 1.137 N/A 1/8 N/A 7/8 N/A 1 1/8
4444-213 N/A 0.139 N/A 0.004 N/A 0.921 N/A 0.010 N/A 1.199 N/A 1/8 N/A 15/16 N/A 1 3/16
4444-214 N/A 0.139 N/A 0.004 N/A 0.984 N/A 0.010 N/A 1.262 N/A 1/8 N/A 1 N/A 1 1/4
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