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Open End Rivet Nut

Open end rivet nut: the barrel is open through, so a bolt can protrude past the nut and the setting stroke is not limited by a closed tail.

Key specifications

MaterialCarbon steel / Stainless
FinishZinc plated
Installationset from one side with a rivet-nut tool
StandardGB/T 17880.4
Typical substratesheet 0.5–3 mm, extrusions, castings
Key inspectionsbulge formation, thread gauging, setting load

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Product overviewOverview

Joint reliability depends on the contact area between bulge and hole wall, the bearing area of the flange, and the strength of the sheet itself. With an open end the bolt can extend beyond the nut, which is what allows a long thread to be used in a thick stack. The trade-off is that the open bore gives water and swarf a path through the joint unless the bolt fills it, so open-end nuts are usually specified with a sealing bolt or in dry interior locations.

Material: Carbon steel / Stainless, with zinc plated as the standard finish. It is set from one side with a rivet-nut tool.

Key featuresFeatures

Long bolts can pass through; the open bore is not sealed by the nut itself.
One-sided setting forms the bulge inside the closed profile, where a wrench could never reach.
Bolt after bolt can be run into the 6H thread, and the absence of welding keeps the surrounding sheet undistorted.
Choose flat for a raised bearing face, countersunk to sit level with the sheet, or hex to resist spin during tightening.

Typical applicationsApplications

Battery pack enclosures
Appliances and elevator panels
Enclosures and sheet-metal cabinets

Selection notesSelection

Use closed-end nuts where the joint has to keep water out; choose open end where bolt protrusion or thick stacks make a closed tail impossible.

Frequently asked questionsFAQ

Is an open-end rivet nut waterproof?

No. The bore is open through the nut, so water can pass along the bolt unless a sealing bolt or sealant is used. For sealed joints a closed-end or sealed type is required.

What matters during installation of the Open End Rivet Nut?

Set it from one side with a rivet-nut tool. Long bolts can pass through; the open bore is not sealed by the nut itself.

Specifications

Material	Carbon steel / Stainless
Finish	Zinc plated
Standard	GB/T 17880.4
Installation	set from one side with a rivet-nut tool
Typical substrate	sheet 0.5–3 mm, extrusions, castings
Key inspections	bulge formation, thread gauging, setting load

Manufacturing and inspection

Internal threads are gauged 6H on every part, with destructive bulge tests sampled.We recommend a pilot assembly at the actual torque and mating part before locking the process parameters for volume.