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ID 3/16 inches OD 5/16 inches 100PCS Nylon Flat Washer Plain Washer Grommets Plastic Sheet Gasket Fastener (M4X8X1): Industrial & Scientific. ID 3/16 inches OD 5/16 inches 100PCS Nylon Flat Washer Plain Washer Grommets Plastic Sheet Gasket Fastener (M4X8X1): Industrial & Scientific. These Washer are RoHS compliant and meet requirements of UL94 V-2 flammability standard. 。 The dielectric nylon material is sturdy and light, which makes these components suitable for applications when you try to save on weight or need it non-conductive, such as isolating or fastening PCBs, working with carbon fiber 。 Nylon Washer has insulation, no magnetic, corrosion resistance, beautiful, never rust and other quality characteristics 。 Package Content:100PCS(+/-2%) 。 1. Medical device industry (insulation/non-magnetic/environmental protection/anti-interference, making medical machinery and equipment more safe to use) 2. Wind power industry (isolation/insulation of chassis circuit /PCB board) . Aerospace industry (insulation/anti-interference number on electronic equipment) 4. Office equipment industry (never rust/beautiful and practical) 5. Petrochemical industry (chemical resistance/corrosion resistance/extended service life of equipment) 6. Electronic industry (insulation/anti-interference/light weight) 7. Communication industry (insulation/non-magnetic/safety) 8. Ship industry (acid/alkali/corrosion resistance/extended service life) 。 。 。