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)

4444-441 N/A 0.275 N/A 0.006 N/A 6.975 N/A 0.040 N/A 7.524 N/A 1/4 N/A 7 N/A 7 1/2
4444-442 N/A 0.275 N/A 0.006 N/A 7.225 N/A 0.045 N/A 7.775 N/A 1/4 N/A 7 1/4 N/A 7 3/4
4444-443 N/A 0.275 N/A 0.006 N/A 7.475 N/A 0.045 N/A 8.025 N/A 1/4 N/A 7 1/2 N/A 8
4444-444 N/A 0.275 N/A 0.006 N/A 7.725 N/A 0.045 N/A 8.275 N/A 1/4 N/A 7 3/4 N/A 8 1/4
4444-445 N/A 0.275 N/A 0.006 N/A 7.975 N/A 0.045 N/A 8.525 N/A 1/4 N/A 8 N/A 8 1/2
4444-446 N/A 0.275 N/A 0.006 N/A 8.475 N/A 0.055 N/A 9.025 N/A 1/4 N/A 8 1/2 N/A 9
4444-447 N/A 0.275 N/A 0.006 N/A 8.975 N/A 0.055 N/A 9.525 N/A 1/4 N/A 9 N/A 9 1/2
4444-449 N/A 0.275 N/A 0.006 N/A 9.975 N/A 0.055 N/A 10.525 N/A 1/4 N/A 10 N/A 10 1/2
4444-002 N/A 0.050 N/A 0.003 N/A 0.042 N/A 0.003 N/A 0.142 N/A 3/64 N/A 3/64 N/A 9/64
5444-4.173 N/A 0.079 N/A 0.003 N/A 4.016 N/A 0.028 N/A 4.173 N/A N/A N/A
4444-168 N/A 0.103 N/A 0.003 N/A 7.237 N/A 0.045 N/A 7.443 N/A 3/32 N/A 7 1/4 N/A 7 7/16
4444-316 N/A 0.210 N/A 0.005 N/A 0.850 N/A 0.010 N/A 1.270 N/A 3/16 N/A 7/8 N/A 1 1/4
4444-454 N/A 0.275 N/A 0.006 N/A 12.475 N/A 0.060 N/A 13.025 N/A 1/4 N/A 12 1/2 N/A 13
4444-032 N/A 0.070 N/A 0.003 N/A 1.864 N/A 0.015 N/A 2.004 N/A N/A N/A
5444-335 N/A 0.051 N/A 0.003 N/A .233 N/A 0.005 N/A 0.335 N/A N/A N/A
4444-249 N/A 0.139 N/A 0.004 N/A 4.859 N/A 0.035 N/A 5.137 N/A 1/8 N/A 4 7/8 N/A 5 1/8
4444-361 N/A 0.210 N/A 0.005 N/A 5.975 N/A 0.037 N/A 6.395 N/A 3/16 N/A 6 N/A 6 3/8
4444-378 N/A 0.210 N/A 0.005 N/A 10.475 N/A 0.060 N/A 10.895 N/A 3/16 N/A 10 1/2 N/A 10 7/8
4444-163 N/A 0.103 N/A 0.003 N/A 5.987 N/A 0.035 N/A 6.193 N/A 3/32 N/A 6 N/A 6 3/16
4444-170 N/A 0.103 N/A 0.003 N/A 7.737 N/A 0.045 N/A 7.943 N/A 3/32 N/A 7 3/4 N/A 7 15/16
4444-177 N/A 0.103 N/A 0.003 N/A 9.487 N/A 0.055 N/A 9.693 N/A 3/32 N/A 9 1/2 N/A 9 11/16
4444-356 N/A 0.210 N/A 0.005 N/A 5.350 N/A 0.037 N/A 5.770 N/A 3/16 N/A 5 3/8 N/A 5 3/4
4444-155 N/A 0.103 N/A 0.003 N/A 3.987 N/A 0.028 N/A 4.193 N/A 3/32 N/A 4 N/A 4 3/16
4444-343 N/A 0.210 N/A 0.005 N/A 3.725 N/A 0.028 N/A 4.145 N/A 3/16 N/A 3 3/4 N/A 4 1/8
5444-085 N/A 0.034 N/A 0.003 N/A 0.017 N/A 0.003 N/A 0.085 N/A N/A N/A
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