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Pins · ISO 8739 · Application guide

What Are Full-Length Grooved Pins with Pilot Used For?

Typical applications, the industries that specify full-length grooved pins with pilot, and how to choose the right size, material and finish for the joint.

Full-Length Grooved Pins with Pilots are used for a full-length grooved pin with a pilot end for easier driving into drilled holes. They are manufactured to ISO 8739, and selection is driven by the nominal diameter, the fit and tolerance the assembly requires, and the service environment.

Primary duty
A full-length grooved pin with a pilot end for easier driving into drilled holes
Governing standard
ISO 8739
Nominal diameter range
1.5 mm to 25 mm
Category
Pins

Application notes are general engineering guidance. Verify the property class and any approval requirement against your own design calculation.

What Are Full-Length Grooved Pins with Pilot Used For? application image

Application guide for Full-Length Grooved Pins with Pilots to ISO 8739. The core duty of the type is a full-length grooved pin with a pilot end for easier driving into drilled holes. The typical industries, the how-to-specify checklist, assembly practice and the exclusion cases are set out below. Stocked across roughly 1.5 mm to 25 mm, they cover general to heavy-duty work.

Typical Applications for Full-Length Grooved Pins with Pilot

The most common settings where these are specified:

  • Appliances: pivots and levers.
  • Automotive: hinges and linkages.
  • Mechanisms: gear and hub fixing.
  • Toys and consumer goods: shafts in plastic parts.

How to Specify Full-Length Grooved Pins with Pilot for Your Application

  • Size: Select on nominal diameter, then on the hole tolerance and fit class — the fit, not the diameter alone, determines whether the part locates or slips. This product spans 1.5 mm–25 mm; check the full table below for the exact dimensions of each size.
  • Material: Choose the material and finish for the service environment — plated steel for general use, stainless for corrosion resistance.
  • Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
  • Standard: This product is supplied to ISO 8739. Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

Installation & Assembly Practice

  • Ream the hole to the specified fit class; a dowel pressed into a drilled-only hole will not locate accurately.
  • Press pins in with steady force rather than hammer blows where possible, and chamfer the hole entry.

Common Selection Mistakes with Full-Length Grooved Pins with Pilot

  • Using a dowel pin as a load-carrying shear bolt — dowels locate, they are not sized for sustained shear.
  • Ignoring the fit class: a locational fit and an interference fit need different hole tolerances.

Where Full-Length Grooved Pins with Pilot Are Not the Right Choice

Not for carrying significant tensile or repeated heavy shear loads — use a bolt or a keyed joint for that.

Custom manufacturing · Made to drawing

Need a full-length grooved pins with pilot outside the standard range?

Tolerance class is what a special pin usually turns on — a locating pin and a retaining pin want very different fits in the same nominal size. Made by cold heading or turning.

Minimum order from 2,000 pieces; samples within 7 days of drawing approval.

Custom pin manufacturingSend a drawing

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.

Dimensioned line drawing of 1.5 mm Full-Length Grooved Pins with Pilot to ISO 8739. Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.
d_1 (mm)
1.5
d_2 (mm)
1.6
c (mm)
1.5
a (mm)
0.2
Length range l (mm)
8~20
Sends the selected values to the quote form below.

Request a Quote

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 (ISO 8739)

Nominal diameter d (mm)d_1 (mm)d_2 (mm)c (mm)a (mm)Length range l (mm)Reference standard
1.5 mm1.51.61.50.28~20ISO 8739
2 mm22.151.50.258~30ISO 8739
2.5 mm2.52.6520.310~30ISO 8739
3 mm33.220.410~40ISO 8739
4 mm44.252.50.510~60ISO 8739
5 mm55.252.50.6314~60ISO 8739
6 mm66.33.50.814~80ISO 8739
8 mm88.33.5114~100ISO 8739
10 mm1010.354.51.214~100ISO 8739
12 mm1212.354.51.618~100ISO 8739
16 mm1616.44.5222~100ISO 8739
20 mm2020.56.52.526~100ISO 8739
25 mm2525.56.5326~100ISO 8739

Video: What Are Full-Length Grooved Pins with Pilot Used For? in use

Third-party video, selected automatically for this topic. It is not produced by Engineering Hardware and is not a specification source — use the tables on this page for dimensional data.

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

Are Full-Length Grooved Pins with Pilot made to a recognized standard?

Yes — they are manufactured to ISO 8739, so dimensions are interchangeable between suppliers when you quote the standard on your order.

What are Full-Length Grooved Pins with Pilot used for?

A full-length grooved pin with a pilot end for easier driving into drilled holes. They are supplied to ISO 8739.

Which industries use Full-Length Grooved Pins with Pilot?

They are commonly specified in automotive, mechanisms and toys and consumer goods, among other sectors.

How do I choose the right size of Full-Length Grooved Pins with Pilot?

Select on nominal diameter and on the fit the assembly requires. This product is available from 1.5 mm to 25 mm; the full dimension table on this page lists each size.

Can I get a quote for Full-Length Grooved Pins with Pilot in the size and material I need?

Yes. Use the technical drawing and quote form on this page to set the size and options, then send the exact configuration to our team for pricing and lead time.