Industrial Fastener · Nuts Series
Coupling Nut / Long Nut
A coupling nut (or long nut) is a long hex nut typically 3 × diameter in length, used to join two pieces of threaded rod end-to-end or to extend the reach of a bolt. Common in suspension systems, threaded rod assemblies, and pipe support.
Product Overview
Coupling Nut / Long Nut from HDBOLT
A coupling nut (or long nut) is a long hex nut typically 3 × diameter in length, used to join two pieces of threaded rod end-to-end or to extend the reach of a bolt. Common in suspension systems, threaded rod assemblies, and pipe support.
Supplied by HDBOLT in Yongnian, China. Our production capacity and extensive fastener stock support repeat orders and mixed-product shipments. Contact us to confirm availability for your size, grade and finish.
DIN 6334
Carbon steel, Stainless 304/316
Threaded rod extensions, hanger systems, electrical conduit support
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 6334 |
|---|---|
| Length | Typically 3 × diameter (e.g. M10 = 30 mm long) |
| Size Range | M5 – M30 |
| Material | Carbon steel, Stainless 304/316 |
| Application | Threaded rod extensions, hanger systems, electrical conduit support |
Common surface finishes
Select an option to review its finish details. Exact coating system, thickness, and corrosion requirement are confirmed with the order.
Quality Control
Quality Checks from Order to Shipment
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 prepared before packing, loading and export delivery.
Buyer Questions
Frequently asked questions
How much rod should engage on each end of a coupling nut?
For full strength, engage at least 1 × diameter on each end (so an M10 coupling nut needs 10 mm of rod engaged from each side). Most installation practice fully engages each end (1.5 × diameter), leaving little or no gap in the middle.
Ready to quote Coupling Nut / Long Nut?
Send the standard, size, grade, finish, quantity, packing requirement, and destination. Availability and lead time are confirmed with the inquiry.