Where this design fits

Multi-level positioning, precision fixtures and custom pivot assemblies.

What to include in the RFQ

Use a datum-based drawing and identify the surfaces that actually locate or carry load.

Material and acceptance

Carbon steel, 10B21, SUS304/316, aluminum, copper/brass and titanium alloy requirements can be discussed. Suitability is specific to the part, grade and process.

Define material condition, coating, critical dimensions and required inspection records. A named product family does not imply a tested load, pressure or performance rating.

RELEVANT PROCESS OPTIONS

Make the features work together.

These routes are options for technical review. The approved drawing, quantity and material determine the actual sequence.

Related product designs

Application discussions

Useful technical reading

Drawing and sample checks

Dimension the locating steps from the seating face
Check diameters and axial distances after finishing.

Dimension chain and datum strategy

Identify which step locates each mating component. Consider the total axial stack and avoid leaving the controlling distance as an unintended accumulation of unrelated dimensions. Agree the diameters, runout or coaxial relationship actually needed for the assembly and the condition in which they are accepted.

Review the route before fixing the quotation

For multi-step & multi-shoulder screws, review Cold Heading + Secondary Machining, Swiss-Type & CNC Turning, Secondary & Precision Operations against the drawing and quantity. Identify which features can be produced in the initial shape and which require a separate setup. A change to a functional shoulder, bore, drive or thread can change the proposed route as well as the inspection effort.

The drawing review should resolve step sequence; feature relationships; finish sequence. Keep material condition and finishing allowance attached to those requirements. Define the acceptance condition for critical features and approve any proposed dimensional change before comparing samples with the original assembly.

From drawing to approved samples

Use a datum-based drawing and identify the surfaces that actually locate or carry load. Identify the drawing revision, prototype quantity and expected repeat demand. Where the first part is based on an existing sample, separately confirm material and hidden features rather than inferring them from appearance.

The typical sampling lead time, including tooling, is approximately 10–15 days. The schedule is confirmed after drawing review and agreement on the sample specification; material availability, special treatment and inspection requirements can affect the confirmed date. Confirm when the agreed schedule starts in the quotation. Sample approval and repeat-production delivery are separate milestones.

Multi-Step & Multi-Shoulder Screws