S-90320A410 0.19" ID x 1.75" OD Washers for Foam Insulation

Key Features & Benefits at a Glance

• Secure Insulation Fastening: Integrated prongs prevent rotation and slippage, ensuring stable attachment in rigid insulation systems.
• Chemical & Moisture Resistance: Made from durable polypropylene plastic, offering excellent resistance to moisture and common chemicals in construction environments.
li>Optimized Thermal Performance: Withstands temperatures up to 150°F, maintaining integrity in varied climate conditions without degrading.
• Precise Compatibility: Designed for No. 10 screws with a 0.19" inner diameter, ensuring easy and accurate installation with standard hardware.
• Enhanced Load Distribution: Large 1.75" outer diameter and 0.180" thickness provide superior surface coverage, reducing stress on insulation materials.
• Environmental Compliance: REACH compliant construction ensures safety and regulatory adherence for sustainable building projects.
• Durability & Longevity: White polypropylene material resists UV exposure and wear, extending the lifespan of insulation installations.

Professional Applications & Engineering Value

These polypropylene plastic washers are engineered to address common challenges in rigid insulation systems, such as fastener loosening and material compression. The pronged design bites into the insulation, preventing movement that can compromise thermal efficiency and structural integrity. By distributing load evenly across a wide surface, the 1.75" OD and 0.180" thickness minimize puncturing and crushing of fragile insulation boards. This is critical in commercial and residential construction, where maintaining consistent R-values and avoiding thermal bridging are priorities. The white color blends discreetly with insulation, while the REACH compliant material ensures safety in environmentally sensitive projects. Ideal for use with No. 10 screws, these washers streamline installation in HVAC, roofing, and wall assemblies, reducing labor time and enhancing long-term performance.

Specification Summary & Compliance

This washer features precise dimensions: 0.19" ID, 1.75" OD, and 0.180" thickness, tailored for No. 10 screw size applications. Manufactured from polypropylene plastic, it meets industry standards for insulation fastening and is REACH (EC 1907/2006) compliant as of June 10, 2022, with no SVHC above threshold limits. The product supports a maximum temperature of 150°F, ensuring reliable performance in typical building environments.