Tapping screw and washer assemblies with plain washers subscription-only ISO 8434-1 discusses tubes that

ISO 8434-1 discusses tubes that are rigid conductors and hoses that are flexible conductors

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BS EN 12618-1 specifies test methods for the product's extensibility and tensile bond strength (as well as the effect of crack width on these parameters)

screws and studs are considered all together

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Tapping screw and washer assemblies with plain washers subscription-only ISO 8434-1 discusses tubes that1 Scope This International Standard specifies the requirements for tapping screws and plain washer assemblies with thread sizes from ST2,2 to ST9,5 inclusive, flat seating heads and mechanical properties as specified in ISO 2702. The plain washers are captive, i. e. prevented from disassembly and free to rotate.