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Nuts · Knurled Countersunk Rivet Nuts

Stainless Knurled Countersunk Blind Rivet Nuts

4 catalogued sizes, dimensioned to Trade series (Bollhoff RIVKLE stainless-steel series). Pick any row and the technical drawing redraws to it.

Stainless Knurled Countersunk Blind Rivet Nuts to Trade series (Bollhoff RIVKLE stainless-steel series) are catalogued in sizes M3 to M4, with dia 8.8-10.3 mm, long 7-8 mm, dia 5-6 mm. 4 sizes are held in the table below, and the technical drawing redraws to whichever row you select.

Standard
Trade series (Bollhoff RIVKLE stainless-steel series)
Size range
M3-M4
Dia
8.8-10.3 mm
Long
7-8 mm
Catalogued sizes
4

Dimensions are nominal values from the governing standard. Confirm the tolerance class for your application before ordering.

Stainless Knurled Countersunk Blind Rivet Nuts technical product image

Applications & Industries

Where Stainless Knurled Countersunk Blind Rivet Nuts are used, and what decides the specification in each case. Stocked from M3 to M4.

Industries that specify Stainless Knurled Countersunk Blind Rivet Nuts

  • Automotive interiors Flush threaded mounting points behind trim and finished panels.
  • Laboratory equipment Stainless blind threads in cleanable covers and guards.
  • Electronic housings Serviceable threads in thin sheet where insert rotation must be controlled.
  • Precision fabrication Countersunk blind inserts that remain below the finished panel face.
  • Automotive & transport Vibration-prone joints where the locking type is specified on the drawing.
  • Maintenance & MRO Replacements matched to the existing bolt class, thread and finish.

Typical applications

  • leaving a countersunk insert flush with the parent sheet
  • resisting rotation through a knurled blind body
  • adding a reusable thread without reaching the rear of the panel
  • matching countersink depth, hole diameter and grip range
  • locking an adjustment so it cannot drift
  • joints re-torqued at a service interval

Service conditions to specify against

Marine and coastal
Available in A4 (316) stainless for chloride exposure — coastal structures, pool halls, water treatment and deck hardware, where A2 will eventually pit.
High load
Supplied in ISO 898-1 property classes, so the joint can be designed to a stated proof load and tightened to a calculated torque rather than by feel.
Match the class
A nut below the bolt property class strips before the bolt reaches its own limit — pair class 8 nuts with 8.8 bolts, class 10 with 10.9.

Where to use something else

  • Do not leave the countersink shallow; a proud flange can interfere with the mating panel or finish.

Full application guide: where Stainless Knurled Countersunk Blind Rivet Nuts are used, how to specify them, and the cases they are wrong for

Technical Drawing

Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.

Sends the selected values to the quote form below.

Request a Quotation for Stainless Knurled Countersunk Blind Rivet Nuts

The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.

Request a Quotation

Specification
Business Information

Dimensions & Specifications (Trade series (Bollhoff RIVKLE stainless-steel series))

Every row below is a starting point for the customizer above — pick any size and the drawing will redraw to that row.

Thread sizeBody diameter (mm)Body length (mm)Grip range (mm)Hole diameter (mm)Countersink thickness (mm)End options
M38.87.01.3~2.05.00.9open / closed
M39.97.02.0~3.05.00.9open / closed
M49.38.01.3~2.06.00.9open / closed
M410.38.02.0~3.06.00.9open / closed

Manufactured to Trade series (Bollhoff RIVKLE stainless-steel series), Stainless Knurled Countersunk Blind Rivet Nuts are nuts supplied by Engineering Hardware. The dimensional data, materials and selection notes are summarized here.

What Are Stainless Knurled Countersunk Blind Rivet Nuts?

Stainless Knurled Countersunk Blind Rivet Nuts are nuts defined by Trade series (Bollhoff RIVKLE stainless-steel series). They are selected by thread size and the dimensional characteristics shown below, and are available in a range of materials and finishes to suit the application and environment.

Materials & Finishes

Common materials include carbon steel (typically zinc plated or hot-dip galvanized), alloy steel in property classes 8.8, 10.9 and 12.9, and stainless steel A2 (304) or A4 (316) for corrosion resistance. Specify the material, property class and surface finish appropriate to your load and environment.

Pricing

Stainless Knurled Countersunk Blind Rivet Nuts are supplied to order. Pricing starts from approximately US$0.24 per piece for standard sizes in carbon steel; final pricing depends on size, material, finish and order quantity (MOQ applies). Submit your exact configuration with the quote form above.

Inside the plant

Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

  1. Wire rod feeding into a cold heading machine
    01

    Cold heading

    Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.

    Head dimensions and under-head radius checked at set-up and per shift.

  2. Thread rolling machine producing bolt threads
    02

    Thread rolling

    Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.

    Go / no-go ring gauges to ISO 965 tolerance class 6g.

  3. Baskets of bolts staged for heat treatment
    03

    Heat treatment

    Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.

    Core hardness and tensile tested per lot to ISO 898-1.

  4. Zinc plated bolts in a treatment basket
    04

    Surface treatment

    Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.

    Coating thickness and neutral salt spray hours to ISO 9227.

Frequently Asked Questions

What is the controlling standard for Stainless Knurled Countersunk Blind Rivet Nuts?

Stainless Knurled Countersunk Blind Rivet Nuts are manufactured to Trade series (Bollhoff RIVKLE stainless-steel series). The dimensional values on this page follow that standard.

What is the size range of Stainless Knurled Countersunk Blind Rivet Nuts?

The table on this page lists 4 sizes for Stainless Knurled Countersunk Blind Rivet Nuts, ranging from M3 to M4. Sizes outside the table can be quoted on request.

In which materials are Stainless Knurled Countersunk Blind Rivet Nuts supplied?

Stainless Knurled Countersunk Blind Rivet Nuts are supplied in matching property-class steel and stainless A2 / A4, with finishes including zinc plating, hot-dip galvanizing and black oxide. Choose material and finish to suit the load and the service environment for Stainless Knurled Countersunk Blind Rivet Nuts.

How do I request a quotation?

Use the parametric drawing on this page to set the exact configuration (size, material, finish) and click "Request this configuration" — a specialist from Engineering Hardware will respond within one business day.