High Precision Metric Imperial Shoulder Screw Hardened Steel Stainless Steel Custom Size for Automotive Automation Mold Assembly
What Is Shoulder Screw? Core Definition & Unique Structural Advantages
Shoulder Screw, also named shoulder bolt or stripper bolt, is a specialized positioning fastener distinguished by smooth unthreaded shoulder between head and thread section, the core shoulder diameter decides assembly spacing and rotating clearance, which is the biggest difference from ordinary machine screws。
Our factory developed diversified structural styles of Shoulder Screw, including hex socket head, slotted head, low head and headless types to match different compact installation space requirements. Compared with standard bolts, our Shoulder Screw removes extra spacer sleeves during assembly, shortens installation working hours and reduces whole accessory procurement cost for manufacturers。
Core Product Features & Differentiated Superiority of Our Shoulder Screw
Strict Precision Machining Control
All finished Shoulder Screw goes through CNC precision turning, shoulder tolerance controlled at h7/g6 standard, surface fine polishing to guarantee low friction for repeated rotating movement of pulleys, gears and linkage components。High dimensional consistency avoids assembly jamming and component offset during long-term equipment operation.
Diversified Raw Material Options for Different Working Environments
We supply two mainstream raw material series for customized Shoulder Screw:
- Alloy Steel 12.9 Grade: Quenched and tempered treatment, high tensile strength, outstanding shear resistance, perfect for heavy-load mechanical equipment and automotive power assembly；
- 304/316 Stainless Steel: Excellent anti-corrosion performance, suitable for humid, acid mist working environment such as outdoor automation equipment and marine small machinery assembly。
Flexible Custom Processing Service
Except standard metric M2-M16 and imperial 1/8''-1/2'' regular sizes, our team supports non-standard customization on shoulder length, thread pitch and head style according to client’s engineering drawing, effectively solving irregular assembly matching pain points that standard Shoulder Screw cannot cover。
Complete Technical Specification Parameters
| Parameter Item | Available Option of Our Shoulder Screw |
|---|---|
| Size Standard | Metric(M2~M16), Imperial(1/8"-1/2") |
| Raw Material | 12.9 Alloy Steel, SUS304, SUS316 Stainless Steel |
| Head Type | Hex Socket, Slotted, Ultra Low Head, Headless |
| Surface Treatment | Black Oxide, Zinc Plating, Passivation |
| Tolerance Grade | Shoulder Dia: g6/h7 |
Send us your drawing or sample. We will quote within 24 hours. OEM and custom orders welcome.
Main Application Industries & Practical Use Cases of Shoulder Screw
Our qualified Shoulder Screw is widely applied across five core downstream manufacturing industries, each field has mature batch supply cases：
Automotive Industry
Used as pivot positioning part for transmission gear, suspension linkage and engine auxiliary assembly, the smooth shoulder ensures stable rotating of moving parts and cuts later maintenance frequency of vehicle components。
Automation & Robotics Equipment
Core hinge pin for robotic arm joint, gripper assembly and linear sliding unit, precise spacing of Shoulder Screw keeps repeated positioning accuracy of automated production equipment。
Injection & Stamping Mold Manufacturing
Serves as stripper plate guiding fastener on plastic injection mold and metal stamping die, avoids plate offset during high-speed mold opening and closing, improves finished product yield of mold processing。
Precision Electronic & Instrument Equipment
Mini-size micro Shoulder Screw(M1.2~M3) used for camera gimbal, precision testing instrument internal fixed pivot, meets compact miniaturized assembly demand of electronic products。
General Industrial Machinery & Furniture Hardware
Mounting pivot for industrial pulley, conveyor linkage and heavy-duty cabinet slide rail, high wear resistance prolongs whole equipment service life。
Target Customer Pain Points & Solution Value of Our Shoulder Screw
Common Troubles Customers Meet With Inferior Fasteners
Most buyers encounter three core problems after using poor-quality generic screws: unstable dimensional tolerance leads to assembly dislocation, easy rusting under humid environment increases replacement cost, insufficient hardness results in shoulder abrasion after frequent rotation。
Targeted Solution Brought By Our Shoulder Screw
- Precision tolerance production solves positioning deviation issue during component assembling;
- Multiple anti-rust surface treatments and stainless steel material options adapt various harsh working conditions;
- High hardness heat treatment process greatly promote abrasion resistance of screw shoulder, reduce after-sales replacement cost for enterprise customers。
Factory Production Strength & Quality Control System for Shoulder Screw
We are professional Shoulder Screw manufacturer with over 10 years fastener production experience, equipped with full set of CNC lathe, heat treatment furnace and precision dimensional testing instruments。
All raw materials come from qualified domestic steel mills, every batch finished Shoulder Screw will pass dimension inspection, hardness test and salt spray anti-corrosion test before warehousing, full inspection report can be provided upon client’s request to guarantee batch product consistency。
Purchase Policy, After-sale Support & Inquiry Guidance for Global Buyers
Order Cooperation Terms
- Standard stock Shoulder Screw: Small MOQ supported, spot goods deliver within 3~7 working days;
- Custom non-standard Shoulder Screw: Confirm drawings first, sample production within 5 working days after deposit, bulk order production scheduled after sample confirmation。
Global After-sales Service
We provide professional technical engineer online support for size selection and application matching, any product quality problem caused by our production error can enjoy free replacement service。
Inquiry Operation Tips
Fill in the page bottom inquiry form with needed size, material, quantity and application industry, our sales manager will quote favorable factory price within 24 working hours。
