Use a custom washer when a catalogue item cannot match the required OD, ID, thickness, hole shape, countersunk seat, cup form, spring function, material, coating or magnetic assembly interface. Start with the part’s job in the assembly. Hardware SP can review the drawing and mating components before comparing a route.
Provide the current drawing or sample, key OD/ID/thickness dimensions, material and finish, washer function, mating screw or bolt, and any magnet, strike plate, panel or kit requirement. Include quantity, drawing revision, receiving evidence and packing condition so the quotation covers the supplied assembly state.
A countersunk washer should be reviewed as a machined part when its turned seat, cup profile or mating relationship needs drawing-specific geometry. The decision depends on the actual profile, material, screw or magnet interface and programme. Do not select a route from the word “countersunk” alone.
Yes, Hardware SP can review countersunk washers, cup washers, magnets and strike plates as a supplied set when you define the components and installation condition. Provide the mating surfaces, fixing method, closure requirement, kit contents and packing expectation so the delivered set is clear before quotation.
Stainless steel and carbon steel are common starting points. Stainless steel is normally supplied unplated, while carbon steel is commonly zinc plated when specified. Other materials and coatings can be reviewed against your drawing, environment, contact surface, appearance and assembly requirement; final selection requires project confirmation.
Choose a custom screw when the standard item cannot meet the installed requirement for head seat, drive access, thread interface, point, captive hardware, material, finish or packing. Start with the joint and current drawing. Hardware SP can assess whether the non-standard feature is needed before a route is quoted.
Provide a controlled drawing or CAD file, mating material and installation detail, head and drive requirement, thread definition, point or engagement requirement, material, finish, quantity, revision status, receiving evidence and packing expectation. A sample helps when it shows the installed condition better than the drawing.
State the drive type, recess geometry or applicable specification, required tool access, installation direction and any torque-related acceptance requirement you need reviewed. If the drive is proprietary or security-related, show it clearly in the drawing. This avoids treating the recess as an undefined cosmetic detail.
They may be supplied as an assembly set when the component relationship and final condition are defined for review. State washer or component order, retained condition, protective packing and receiving requirements. The RFQ should describe what your operator installs, not only the individual screw.
A revised head, drive, thread, point, material, finish, captive component or packing condition can alter the manufacturing and release requirement. Send a clearly identified current revision before a repeat order or change. This gives the buyer and supplier a single controlled reference for review.
