As per our Shipping and Returns Policy, custom cuts and fabricated parts are non-returnable. If you need an over- or undersized item, note it under "Comments" during Checkout. Cut-to-size orders have an acceptable cut tolerance of 1/8" (0.125"), so clarify if the adjustment is to be made on the (+) or (-) side of the saw blade.Please review our full return and shipping policy here.
Measure Twice, Cut Once
Since custom cuts and fabricated parts are non-refundable, be very careful while measuring your dimensions. As each cut is nominal, even the slightest miscalculation could be costly.
How to Use a Measuring Tape
Extend your tape measure several inches to find the 1 and 2 inch markers. In between the inch markers you’ll find 16 equally spaced tick marks.
Measure by counting the increments beyond the nearest inch. As the increments decrease, so does the length of the mark. For example, 1/2" has a bigger mark than 1/4" which has a bigger mark than 1/8". The smallest mark follows at 1/16". Please be aware that some measuring tapes may have even smaller increments.
Features of a Measuring Tape: Sliding End Hook
The sliding end hook is designed for two different types of measurements. An outside measurement (where the hook of the tape hangs over an edge), requires the hook to slide out a bit to account for the thickness of the material. When making an inside measurement (where the hook will push up against a surface), the clip slides in, again, accounting for its thickness. The measuring tape self-adjusts to guarantee an accurate measurement (as far as the tape is concerned).
Sanitizing Acrylic and Polycarbonate Sheet [X]
Acrylic and Polycarbonate Sneeze Guards and like products require special care while cleaning and disinfecting. To maintain the optical clarity of sneeze guards and other acrylic or polycarbonate items, use an acrylic or polycarbonate safe cleaner like Novus Plastic Polish #1, Brillianize Plastic Cleaner, or a mild soap solution.
Please reference the following compatible cleaners when DISINFECTING acrylic and polycarbonate items. The use of commonly available commercial alcohol or ammonia-based disinfectants may cause crazing and damage.
G-10/FR4 Glass Epoxy is a high-pressure thermoset laminate known for its extremely high mechanical strength, near-zero moisture absorption, and flame retardant properties. G-10/FR4 is the global standard for electrical insulation in both dry and humid environments.
As a direct Garolite equivalent engineered for stability, this FR4-grade material features UL94 V-0 flame retardancy. It is the primary choice for printed circuit boards, terminal boards, and aerospace components where safety and structural integrity are critical.
Beyond electronics, G-10 is non-conductive and non-magnetic, making it the industry standard for MRI and medical imaging applications where metal is strictly prohibited. Its ability to maintain high mechanical strength without interfering with sensitive magnetic fields ensures reliability in critical diagnostic environments.
G-10/FR4 is favored for its near-zero water absorption and superior dimensional stability. Choose G-10/FR4 for:
Exceptional Dielectric Strength: Reliable electrical insulation in high-humidity or submerged environments.
High Strength-to-Weight Ratio: Offers flexural, impact, and bond strength that rivals metals while remaining significantly lighter.
Flame Retardant (FR4): Brominated resin system meets UL 94 V-0 requirements for self-extinguishing safety.
Precision Machining: Maintains tight tolerances and high dimensional stability; ideal for intricate CNC-machined components like lapping carriers.
G-10 vs. G-10/FR4: Understanding the Difference
While the terms are often used interchangeably, the primary difference lies in fire safety requirements.
Choose G-10/FR4 (This Sheet) for almost all modern applications. It is the flame-retardant version of G-10 and is the global standard for PCB manufacturing and electrical housing.
Choose G-10 only if your specific application explicitly prohibits brominated flame retardants. G-10 offers slightly stronger flexural and compressive strength without the UL fire rating.
Industrial Fabrication & Compliance
G-10/FR4 is a tough and highly abrasive material that will dull standard high-speed steel (HSS) tooling quickly. It requires carbide tooling for clean machining due to its glass-weave reinforcement.
The fine glass dust produced during cutting is a known irritant and requires specialized dust collection.
G-10/FR4 (NP510A) complies with MIL-I-24768/27, Type GEE-F and NEMA FR-4 requirements, ensuring it meets the most rigorous military and aerospace standards for structural laminates.
Trusted Industry Expertise
When you order from Interstate Plastics, you're accessing an expansive nationwide network of material expertise. We source our G-10/FR4 from world-class laminators to ensure every sheet meets precise MIL-spec and NEMA standards, providing the reliability required by engineers in the aerospace and semiconductor industries.
Handling: Cut sheets may have sharp edges. We recommend wearing protective gloves when unpacking and handling this material to ensure safety.
Suitability: We take pride in the quality of our materials as they leave our facility. However, because every project is unique, we cannot account for how materials are modified, stored, or used after delivery. Please perform the necessary tests to ensure this material is right for your specific application and end-use conditions.
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Technical Performance
G-10/FR4 is a high-pressure industrial laminate comprised of a continuous filament glass cloth material bonded with an epoxy resin system. It is engineered to maintain superior mechanical strength and electrical insulating properties in both dry and humid conditions, making it the most versatile of the glass-reinforced phenolic grades.
High Flexural Strength: Boasts a flexural strength of over 65,000 psi, providing rigid structural support under extreme mechanical loads.
Dielectric Strength: Offers excellent electrical insulating properties (typically 500+ Vpm), ideal for high-voltage power distribution.
Low Moisture Absorption: Water absorption rate of near 0.10%, ensuring dimensional stability and electrical integrity when submerged or in high-humidity.
Flame Retardancy: The "FR" (Flame Retardant) designation signifies UL 94 V-0 compliance, making it self-extinguishing and safe for critical electronics.
Thermal Stability: Operating temperatures up to 266°F (130°C) allow for use in demanding industrial environments without losing structural bond strength.
Key Properties
Dimensional Stability: Minimal thermal expansion ensures that complex machined parts remain within tight tolerances during temperature fluctuations.
Chemical Resistance: Highly resistant to a wide variety of solvents, oils, and chemicals, preventing delamination and surface degradation.
Garolite Equivalent: Also known by the trade name Garolite, this material provides a high-reliability alternative to standard G-10 when fire safety is a factor.
NEMA Grade Standards: Meets or exceeds NEMA LI-1 standards for FR-4 and G-10 industrial laminates, ensuring consistent material quality.
Common Industrial & Commercial Applications
Electronics & Semiconductors: Printed circuit board (PCB) stiffeners, terminal boards, and test sockets for semiconductor manufacturing.
Power Generation: Transformer components, switchgear, and high-voltage insulating spacers.
Precision Tooling: Lapping carriers, polishing discs, and high-wear jigs for manufacturing processes.
Medical Technology: Non-magnetic structural supports and insulating components for imaging equipment (MRI/X-Ray).
Engineering Limitations & Alternatives
While G-10/FR4 is an industry workhorse, certain specialized environments may require an alternative phenolic grade.
Extreme High Temperatures: Standard G-10/FR4 is rated to 130°C and is not suited for continuous use in environments exceeding this limit. Better Alternative: For higher heat resistance (up to 180°C), use G-11 Glass Epoxy.
Bromine-Restricted Applications: G-10/FR4 contains brominated flame retardants. In some industries, this additive prohibits its use for environmental or specific compliance reasons. Better Alternative: For non-flame retardant requirements, use Non-FR4 G-10 Glass Epoxy.
Impact Wear on Mating Parts: Because G-10/FR4 is glass-reinforced, it can be abrasive to metal mating parts in high-friction sliding applications. Better Alternative: For high-wear applications involving friction, consider Acetal (Delrin®) or Cast Nylon.
