I source step shoulder screw solutions for demanding industrial setups, because your machinery deserves precision and reliability. I work directly with trusted Manufacturers to offer Wholesale programs that fit your purchasing scale. The step shoulder screw I recommend has a hardened steel body, a ground shoulder, and a clearly defined step to reduce play and boost repeatability in fixtures and automation lines. It's suitable for jigs, locating dies, and high-cycle mounts where a positive-stop is critical. Available in multiple diameters and lengths, with options for zinc or black-oxide finishes and tight tolerances. I can tailor shoulder lengths and shoulder steps to your exact application, shortening lead times and simplifying stocking. For bulk orders, our Wholesale pricing and flexible MOQs make sense for shops, contract manufacturers, and OEMs alike. If you need a reliable step shoulder screw that pairs with your standard bolts and guides, contact me today for a custom quote and fast delivery.
Step shoulder screws are critical for precise alignment, axial guidance, and load transfer in automation and machinery. For global buyers, the key to peak performance lies in a supplier that combines clear design intent with disciplined manufacturing. A factory that guarantees performance uses end-to-end quality control—from verified materials and in-process checks to final inspections with dimensional reports and functional tests. With consistent shoulder dimensions, accurate thread engagement, and controlled runout, these components deliver repeatable positioning across assemblies and environments. Beyond strict tolerances, performance is secured by material choices, surface finishes, and corrosion resistance for diverse climates. Coatings such as zinc, black oxide, or nitride protect against wear while preserving fit. Reliable lead times, scalable capacity, and worldwide logistics reduce supply risk for international buyers. Clear documentation, warranty terms, and responsive after-sales support turn a component purchase into a lasting partnership, ensuring equipment maintains peak performance from prototype to production.
| Parameter | Description | Value | Unit | Notes |
|---|---|---|---|---|
| Shoulder Diameter (D) | Diameter of the unthreaded cylindrical portion | 0.25 | in | D = 6.35 mm |
| Shoulder Length (Ls) | Length of the shoulder from base to start of threads | 0.75 | in | Shoulder length: 19.05 mm |
| Thread Size (T) | Thread engagement size | 1/4-20 | - | Coarse Unified thread |
| Thread Length (Lt) | Length of threaded portion | 0.50 | in | 12.7 mm |
| Overall Length (OAL) | Total bolt length from head to tip | 1.50 | in | 38.1 mm |
| Head Style | Head geometry | Socket Cap | - | Hex/Allen drive |
| Head Diameter (Hd) | Diameter of the head | 0.44 | in | 11.18 mm |
| Material | Base material specification | AISI 316 Stainless Steel | - | Corrosion resistant |
| Finish | Surface finish | Polished | - | Mirror-like surface |
| Hardness | Rockwell hardness (HRC) | 38-42 | HRC | Typical stainless grade range |
| Tensile Strength | Ultimate tensile strength | 515 | MPa | Rm |
| Yield Strength | Yield strength | 205 | MPa | Re |
| Surface Roughness | Ra value on machined surfaces | 0.4 | µm | Average roughness |
| Operating Temperature | Ambient operating range | -40 to 250 | °C | Corrosion and heat resistant |
| Standards / Certifications | Compliance and quality | ISO 9001 | - | RoHS compliant |