Product Center · Blind Riveting

Type 71 Flush Knurled Sealing Rivet Nut

Type 71 flush knurled sealing rivet nut: a knurled barrel for grip in the hole and a flange face that seals against the panel.

Key specifications

MaterialCarbon Steel / Stainless Steel
Installationset from one side with a rivet-nut tool
StandardGB/T 17880.1–.4 (blind rivet nuts)
Typical substratesheet 0.5–3 mm, extrusions, castings
Key inspectionsbulge formation, thread gauging, setting load

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Product overviewOverview

A rivet nut combines a thread and a rivet in one part: the barrel is threaded inside, and the tail is a deformable wall. The knurl resists rotation and the flange face carries the seal. Because the knurl is on the barrel and the seal on the flange, the two cannot substitute for each other: a knurled barrel with a scored flange face will still leak, and a good seal on a smooth barrel will still spin.

Material: Carbon Steel / Stainless Steel. It is set from one side with a rivet-nut tool.

Key featuresFeatures

Knurl for grip, flange face for sealing: two separate functions.
Flat, countersunk and hex heads differ in where the bearing face lands and in how the body is held during setting.
Annealed tail concentrates deformation where intended for a consistent bulge.
Zinc-plated carbon steel or 304/316 stainless, chosen to the environment.

Typical applicationsApplications

Appliances and elevator panels
Enclosures and sheet-metal cabinets
Automotive body and chassis attachments

Selection notesSelection

Choose barrel length from sheet thickness, head style from the mounting face, then size from load; if thickness is outside the grip range, change the part rather than raising setting force.

Frequently asked questionsFAQ

Can the knurl take the place of the seal?

No. The knurl leaves gaps between the teeth and does not form a sealing line. Sealing depends on continuous compression of the flange face.

What matters during installation of the Type 71 Flush Knurled Sealing Rivet Nut?

Set it from one side with a rivet-nut tool. Knurl for grip, flange face for sealing: two separate functions.

Specifications

Material	Carbon Steel / Stainless Steel
Type	Rivet nut
Standard	GB/T 17880.1–.4 (blind rivet nuts)
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

Bulge diameter and clamp height are measured after setting against the process window.Alternative materials and finishes can be quoted side by side during sampling, so cost and corrosion resistance can be traded off explicitly.