Skip to content
WhatsApp
Request a Quote
Pins · Indexing Plungers

Indexing Plungers

6 catalogued sizes, dimensioned to Trade series (GN 817). Pick any row and the technical drawing redraws to it.

Indexing Plungers to Trade series (GN 817) are catalogued in dia 4-16 mm. 6 sizes are held in the table below, and the technical drawing redraws to whichever row you select.

Standard
Trade series (GN 817)
Dia
4-16 mm
Catalogued sizes
6

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

Indexing Plungers technical product image

Applications & Industries

The sectors that buy Indexing Plungers, and the duty each one buys them for. Stocked from M8u00d71 to M24u00d72.

Industries that specify Indexing Plungers

  • Agricultural machinery Adjustable hitch, guard and linkage positions.
  • Conveyor systems Hand-released changeover points that re-engage positively.
  • Access equipment Folding frames and platforms held at selected positions.
  • Tooling and workholding Manual indexing of fixture positions with a retractable hardened pin.
  • Machine building Hinges, pivots and linkages carrying light to moderate shear.
  • Agricultural & plant Implement connections made and broken in the field.

Typical applications

  • choosing pin diameter and stroke for the hole pattern
  • locking an adjustable mechanism when the knob is released
  • replacing a loose indexing pin in a frequently changed assembly
  • retracting a hardened pin by hand to release an indexed position
  • quick connections made and broken by hand
  • locating two parts to a repeatable position

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.
Hole preparation
The hole is half the specification: a ground dowel needs a reamed H7 hole, a grooved or spring pin will hold in a drilled one.

Where to use something else

  • Do not rely on the plunger for a structural load path; the mating pin hole and a separate retainer carry that duty.

Full application guide: where Indexing Plungers 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 Indexing Plungers

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 (GN 817))

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

Thread sizePin diameter (mm)Pin stroke options (mm)TypesHousingPinKnob
M8u00d7144 / 6B / BK / C / CK / G / GKblackened steelhardened steelpolyamide
M10u00d7155 / 8B / BK / C / CK / G / GKblackened steelhardened steelpolyamide
M12u00d71.566 / 9B / BK / C / CK / G / GKblackened steelhardened steelpolyamide
M16u00d71.588 / 12B / BK / C / CK / G / GKblackened steelhardened steelpolyamide
M20u00d71.51212 / 15B / BK / C / CK / G / GKblackened steelhardened steelpolyamide
M24u00d721616 / 20B / BK / C / CK / G / GKblackened steelhardened steelpolyamide

Indexing Plungers conform to Trade series (GN 817). As pins, they are specified by the dimensions in the table below; this page also covers materials, finishes and typical uses.

What Are Indexing Plungers?

Indexing Plungers are pins defined by Trade series (GN 817). 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), hardened or case-hardened steel where wear matters, and stainless steel A2 (304) or A4 (316) for corrosion resistance. Specify the material, hardness where relevant, and the surface finish appropriate to your application and environment.

Pricing

Indexing Plungers are supplied to order. Pricing starts from approximately US$0.80 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 standard are Indexing Plungers manufactured to?

Indexing Plungers are manufactured to Trade series (GN 817). The dimensional values on this page follow that standard.

Which sizes of Indexing Plungers does Engineering Hardware supply?

The table on this page lists 6 sizes for Indexing Plungers, ranging from M8u00d71 to M24u00d72. Sizes outside the table can be quoted on request.

In which materials are Indexing Plungers supplied?

Indexing Plungers are supplied in hardened alloy steel and stainless, with finishes including zinc plating, hot-dip galvanizing and black oxide. Choose material and finish to suit the load and the service environment for Indexing Plungers.

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.