Industrial Fastener · Bolts Series
Socket Shoulder Screw / Shoulder Bolt
Socket shoulder screws, also called shoulder bolts or stripper bolts, combine a precision smooth shoulder with a smaller threaded end. The shoulder acts as a bearing surface, shaft, spacer, guide, or pivot while the thread clamps the fastener into a tapped hole. Shoulder diameter and length are...
Product Overview
Socket Shoulder Screw / Shoulder Bolt sourcing essentials
Socket shoulder screws, also called shoulder bolts or stripper bolts, combine a precision smooth shoulder with a smaller threaded end. The shoulder acts as a bearing surface, shaft, spacer, guide, or pivot while the thread clamps the fastener into a tapped hole. Shoulder diameter and length are the critical ordering dimensions.
ISO 7379, DIN 7379, ANSI/ASME B18.3
Alloy steel hardened, Stainless 303/304/316
Pivots, bearings, dies, guides, linkages, automation equipment
Inspection records, lot labels, certificate options, and destination-ready packing.
Technical Data
Specification range
Final dimensions, mechanical properties, finish, and packing are confirmed against the RFQ and applicable standard.
| Standards | ISO 7379, DIN 7379, ANSI/ASME B18.3 |
|---|---|
| Shoulder Diameter | Metric and inch standard ranges; custom diameters available |
| Shoulder Length | Standard increments or custom to drawing |
| Material | Alloy steel hardened, Stainless 303/304/316 |
| Surface Finish | Black oxide, Plain, Nickel plated, Stainless |
| Tolerance | Precision-ground shoulder; specify diameter and length tolerance |
| Typical Application | Pivots, bearings, dies, guides, linkages, automation equipment |
Common surface finishes
Select an option to review its sourcing note. Exact coating system, thickness, and corrosion requirement are confirmed with the order.
Quality Control
Checked before consolidation and export
Each order is matched to the specified standard and verified at practical control points before shipment.
RFQ confirmation
Standard, size, grade, pitch, finish, certificates, packing, and destination are locked before production.
Lot verification
Critical dimensions, thread fit, markings, finish appearance, and packing labels are sampled and recorded.
Shipment approval
Photos and required reports are organized before consolidated loading and export documentation.
Buyer Questions
Frequently asked questions
How do I specify a shoulder screw correctly?
State the shoulder diameter, shoulder length, thread size and length, material, finish, and required tolerances. Do not order only by thread diameter: the shoulder is intentionally larger than the threaded end and controls the fit in the mating component.
Can HDBolt supply custom shoulder bolts?
Yes. Send a drawing with shoulder diameter and tolerance, shoulder length, thread, head dimensions, material, heat treatment, finish, and quantity. Custom ground shoulders and non-standard thread combinations are confirmed by inquiry.
Ready to quote Socket Shoulder Screw / Shoulder Bolt?
Send the standard, size, grade, finish, quantity, packing requirement, and destination. Availability and lead time are confirmed with the inquiry.