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Type 71 Flush Knurled Sealing Rivet Nut with Knurl Anti-Rotation and Flange Seal

Type 71 flush knurled sealing rivet nut in the sealing range: the flange seal is the subject, with the knurl treated as an anti-rotation feature.

Key specifications

MaterialStainless Steel / Brass
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 and the flange seal are separate features doing separate jobs. Sealing comes from continuous compression of the coated flange face against the panel; the knurl only stops the nut turning while the bolt is tightened, and its teeth leave channels that do not seal.

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

Key featuresFeatures

Flange face seals, knurl only resists rotation.
Blind setting forms the bulge against the far wall, which is what makes the seal practical on closed sections.
The 6H thread tolerates repeated dismantling, and with no weld there is no heat distortion to flatten the sealing face.
A flat head presents a gasket face, a countersunk head sits level with the panel, and a hex head lets a fixture hold the body while the bolt turns.

Typical applicationsApplications

Automotive body and chassis attachments
Rail interior and equipment brackets
Battery pack enclosures

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

Does the knurled barrel help sealing?

No. The teeth create gaps and cannot form a sealing line. Sealing is entirely carried by compression of the flange face coating.

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

Set it from one side with a rivet-nut tool. Flange face seals, knurl only resists rotation.

Specifications

Material	Stainless Steel / Brass
Sealing Method	Pre-applied sealant / O-ring
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

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.