Industrial Fastener · Threaded Rods Series
Stud Bolt, Reduced Shank
Reduced-shank studs have a smooth middle section machined down below the thread root diameter. The reduced cross-section allows the stud to elastically stretch under preload, providing more consistent gasket clamping and improved fatigue resistance — important in cycling pressure or thermal service.
Product Overview
Stud Bolt, Reduced Shank sourcing essentials
Reduced-shank studs have a smooth middle section machined down below the thread root diameter. The reduced cross-section allows the stud to elastically stretch under preload, providing more consistent gasket clamping and improved fatigue resistance — important in cycling pressure or thermal service.
DIN 2509 (waist 0.9d), DIN 2510 (waist 0.85d)
Alloy steel (B7, B16, L7), Stainless
High-pressure flanges, steam turbines, pressure vessels
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 | DIN 2509 (waist 0.9d), DIN 2510 (waist 0.85d) |
|---|---|
| Application | High-pressure flanges, steam turbines, pressure vessels |
| Material | Alloy steel (B7, B16, L7), Stainless |
| Documentation | MTC 3.1 standard |
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
Why does a reduced-shank stud improve flange performance?
Under preload, the stud stretches elastically. A reduced shank stretches more for a given torque (because the cross-section is smaller), which means the stud stores more elastic energy. As the gasket creeps or relaxes, this stored energy maintains clamp load far longer than a full-cross-section stud would.
Ready to quote Stud Bolt, Reduced Shank?
Send the standard, size, grade, finish, quantity, packing requirement, and destination. Availability and lead time are confirmed with the inquiry.