Polyurethane Rubber Washers
Polyurethane (PU) rubber washers handle abrasion, tear, and load-bearing duty that softer elastomers cannot survive. Cannon Gasket die-cuts custom polyurethane washers for mining, hydraulic, automotive suspension, and high-wear industrial sealing.
- Durometer
- 10A to 95A
- Highlight
- Outstanding abrasion resistance
Request a quote for Polyurethane rubber washers.
Properties of Polyurethane rubber washers
Cannon Gasket cuts Polyurethane rubber washers in durometers ranging from 10A to 95A Shore hardness. Polyurethane exhibits good resistance to oils, greases, oxygen, and ozone.
Polyurethane tolerances and customization
Standard dimensional tolerances on Polyurethane rubber washers land around ±0.010" to ±0.015" on OD and ID, depending on durometer and thickness. Tighter tolerances are available on selected grades. Cannon Gasket cuts Polyurethane to custom profiles in-house and matches lead times to your production volume. PSA backing, pad printing, custom packaging, and kitting are all on the menu when you need them.
How Polyurethane Performs in Washer Applications
- Exceptional abrasion and tear resistance — among the highest of any elastomer. - High load-bearing capacity at thin cross-section. - Good resistance to oils, fuels, and aliphatic hydrocarbons.
Common Washer Applications
Mining and aggregate equipment sealing, hydraulic cylinder washers, vibration isolation pads, automotive suspension bushings, wear washers under bearing loads, and equipment that combines oil exposure with abrasion.
When Another Material Is the Better Specification
For high temperature, Viton or silicone. For steam / water exposure, EPDM.
Manufacturing Methods
Die-cut and lathe-cut manufacturing
Standard sizes, tolerances & manufacturing
Precision & tooling: Capable of holding tolerances as tight as ±.001" on critical dimensions when required, beyond the ±0.010" to ±0.015" standard. Short- and long-run capabilities. All parts available with pressure-sensitive adhesive (PSA) on one or two sides.
Clean room: Cannon Gasket offers clean-environment stamping for medical, FDA, electronic, and scientific applications where a controlled level of particulate is required, with capabilities to meet ISO Class 10,000.
Stocking agreements: Blanket orders, VMI (vendor-managed inventory), JIT (just-in-time), and Kanban replenishment programs.
Pad printing: Pad print your part number, identification marking, or company name in a range of ink colors. Marking per customer specifications or MIL-STD-130.
Packaging: Parts are bagged and tagged in specified quantities and labeled with P/N or any required information. Capability to meet specific packaging and labeling requirements.
Standard Screw Size Rubber Washers
| Screw Size | Outside Diameter | Inside Diameter | Thickness |
|---|---|---|---|
| #6 Standard | 0.250" | 0.120" | 0.015" – 0.250" |
| #6 Option | 0.375" | 0.120" | 0.015" – 0.250" |
| #8 Standard | 0.312" | 0.150" | 0.015" – 0.250" |
| #8 Option | 0.438" | 0.150" | 0.015" – 0.250" |
| #10 Standard | 0.375" | 0.170" | 0.015" – 0.250" |
| #10 Option | 0.500" | 0.170" | 0.015" – 0.250" |
| #12 Standard | 0.437" | 0.195" | 0.015" – 0.250" |
| #12 Option | 0.562" | 0.195" | 0.015" – 0.250" |
| #14 Standard | 0.500" | 0.230" | 0.015" – 0.250" |
| #14 Option | 0.625" | 0.230" | 0.015" – 0.250" |
| 5/16" Standard | 0.562" | 0.290" | 0.015" – 0.250" |
| 5/16" Option | 0.688" | 0.290" | 0.015" – 0.250" |
| 3/8" Standard | 0.625" | 0.355" | 0.015" – 0.250" |
| 3/8" Option | 0.812" | 0.355" | 0.015" – 0.250" |
| 1/2" Standard | 1.062" | 0.490" | 0.015" – 0.250" |
| 3/4" Standard | 1.500" | 0.740" | 0.015" – 0.250" |
Standard RMA Thicknesses and Tolerances for Elastomers
| Nominal Thickness | Tolerance |
|---|---|
| 0.015" | ±0.010" |
| 0.031" | ±0.012" |
| 0.062" | ±0.016" |
| 0.093" | ±0.016" |
| 0.125" | ±0.020" |
| 0.187" | ±0.031" |
| 0.250" | ±0.031" |
| 0.375" | ±0.047" |
| 0.500" | ±0.047" |
Standard references shown. Cannon Gasket also cuts custom outside diameters, inside diameters, and thicknesses to your drawing. Send your specifications for a quote.