Buna-N (Nitrile) Rubber Gaskets
Buna-N, also called Nitrile or NBR, is a common elastomer in the seal and gasket industry. Cannon Gasket die-cuts custom Buna-N gaskets for applications where petroleum products, oils, fuels, hydraulic fluids, or greases are in contact with the gasket. Available in commercial, high-grade, FDA, and cloth-inserted grades.
- Durometer
- 10A to 90A
- Highlight
- Oil & fuel resistant
Request a quote for Buna-N / Nitrile gaskets.
Properties of Buna-N / Nitrile gaskets
Cannon Gasket cuts Buna-N / Nitrile gaskets to your specifications in durometers ranging from 10A to 90A Shore hardness. Excellent resistance to petroleum oils, fuels, greases, and hydraulic fluids.
Buna-N / Nitrile tolerances and customization
Standard dimensional tolerances on Buna-N / Nitrile gaskets land around ±0.010" to ±0.015" on OD and ID, depending on material durometer and thickness. Tighter tolerances are available on selected grades. Cannon Gasket cuts Buna-N / Nitrile 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 Buna-N Performs in Oil, Fuel, and Hydraulic Service
- Excellent resistance to petroleum oils, gasoline, diesel, and hydraulic fluids. - Good compression set, tensile strength, and abrasion resistance. - Available in durometers from 10 to 90 Shore A. - Cost-effective compared to fluorocarbon elastomers.
Where Buna-N Gaskets Are Specified
Fuel-system gaskets, hydraulic and pneumatic flange gaskets, pump and compressor service, automotive engine and fuel-system sealing, plumbing, and general industrial applications where petroleum contact is part of the duty cycle.
When to Choose Buna-N vs. Another Elastomer
- vs. EPDM — Buna-N for oil and fuel contact; EPDM for steam, water, and outdoor weathering. - vs. Viton — Buna-N when budget matters and temperatures stay under 250°F; Viton when chemical exposure is aggressive or temperatures exceed 250°F. - vs. Silicone — Buna-N for oil contact; Silicone for extreme high or low temperature where chemical exposure is mild.
Manufacturing Methods
Die-cut on flat-bed presses for standard runs, rotary-cut for high-volume web-fed production, and steel-rule-cut for large parts. PSA backing, clean room production, pad printing, and stocking programs are available.
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 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.