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)

4444-346 N/A 0.210 N/A 0.005 N/A 4.100 N/A 0.028 N/A 4.520 N/A 3/16 N/A 4 1/8 N/A 4 1/2
4444-349 N/A 0.210 N/A 0.005 N/A 4.475 N/A 0.030 N/A 4.895 N/A 3/16 N/A 4.5 N/A 4 7/8
4444-352 N/A 0.210 N/A 0.005 N/A 4.850 N/A 0.030 N/A 5.270 N/A 3/16 N/A 4 7/8 N/A 5 1/4
4444-433 N/A 0.275 N/A 0.006 N/A 5.475 N/A 0.037 N/A 6.025 N/A 1/4 N/A 5 1/2 N/A 6
4444-439 N/A 0.275 N/A 0.006 N/A 6.475 N/A 0.040 N/A 7.025 N/A 1/4 N/A 6 1/2 N/A 7
4444-451 N/A 0.275 N/A 0.006 N/A 10.975 N/A 0.060 N/A 11.525 N/A 1/4 N/A 11 N/A 11 1/2
5444-6.525 N/A 0.330 N/A 0.006 N/A 5.975 N/A 0.040 N/A 6.635 N/A N/A N/A
4444-448 N/A 0.275 N/A 0.006 N/A 9.475 N/A 0.055 N/A 10.025 N/A 1/4 N/A 9 1/2 N/A 10
4444-313 N/A 0.210 N/A 0.005 N/A 0.662 N/A 0.009 N/A 1.082 N/A 3/16 N/A 11/16 N/A 1 1/16
4444-344 N/A 0.210 N/A 0.005 N/A 3.850 N/A 0.028 N/A 4.270 N/A 3/16 N/A 3 7/8 N/A 4 1/4
4444-345 N/A 0.210 N/A 0.005 N/A 3.975 N/A 0.028 N/A 4.395 N/A 3/16 N/A 4 N/A 4 3/8
5444-359 N/A 0.070 N/A 0.003 N/A 0.219 N/A 0.005 N/A 0.359 N/A N/A N/A
4444-239 N/A 0.139 N/A 0.004 N/A 3.609 N/A 0.028 N/A 3.887 N/A 1/8 N/A 3 5/8 N/A 3 7/8
4444-425 N/A 0.275 N/A 0.006 N/A 4.475 N/A 0.033 N/A 5.025 N/A 1/4 N/A 4 3/4 N/A 5
4444-428 N/A 0.275 N/A 0.006 N/A 4.850 N/A 0.033 N/A 5.400 N/A 1/4 N/A 4 7/8 N/A 5 3/8
4444-429 N/A 0.275 N/A 0.006 N/A 4.975 N/A 0.037 N/A 5.525 N/A 1/4 N/A 5 N/A 5 1/2
4444-430 N/A 0.275 N/A 0.006 N/A 5.100 N/A 0.037 N/A 5.650 N/A 1/4 N/A 5 1/8 N/A 5 5/8
4444-431 N/A 0.275 N/A 0.006 N/A 5.225 N/A 0.037 N/A 5.775 N/A 1/4 N/A 5 1/4 N/A 5 3/4
4444-432 N/A 0.275 N/A 0.006 N/A 5.350 N/A 0.037 N/A 6.150 N/A 1/4 N/A 5 3/8 N/A 6 1/8
4444-435 N/A 0.275 N/A 0.003 N/A 5.725 N/A 0.037 N/A 6.275 N/A 1/4 N/A 5 3/4 N/A 6 1/4
4444-434 N/A 0.275 N/A 0.006 N/A 5.600 N/A 0.037 N/A 6.125 N/A 1/4 N/A 5 5/8 N/A 6 1/8
4444-436 N/A 0.275 N/A 0.006 N/A 5.850 N/A 0.037 N/A 6.400 N/A 1/4 N/A 5 7/8 N/A 6 3/8
4444-437 N/A 0.275 N/A 0.006 N/A 5.975 N/A 0.037 N/A 6.525 N/A 1/4 N/A 6 N/A 6 1/2
4444-438 N/A 0.275 N/A 0.006 N/A 6.225 N/A 0.040 N/A 6.775 N/A 1/4 N/A 6 1/4 N/A 6 3/4
4444-440 N/A 0.275 N/A 0.006 N/A 6.725 N/A 0.040 N/A 7.275 N/A 1/4 N/A 6 3/4 N/A 7 1/4
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