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Pins · Trade series (GN 615.8)

M12 Friction-Bearing Ball Spring Plungers Dimensions

Controlling dimensions to Trade series (GN 615.8), with tolerances and fit.

M12 Friction-Bearing Ball Spring Plungers dimensions to Trade series (GN 615.8): coarse thread pitch 1.75 mm.

Coarse thread pitch
1.75 mm

Figures are nominal values from the governing standard. Confirm against the tolerance class for your application before machining or ordering.

M12 Friction-Bearing Ball Spring Plungers Dimensions reference image

Dimensional data for M12 Friction-Bearing Ball Spring Plungers to Trade series (GN 615.8), with the installation notes for this type. Values are taken from the governing standard rather than from a general machine-thread table, because this type is not selected on one.

M12 Dimensional Row (Trade series (GN 615.8))

Thread sizeLength L (mm)Ball diameter (mm)Standard spring initial/end load (N)High-load spring initial/end load (N)Housing material
M12226.526 / 4939.5 / 77.3blackened steel or AISI 303 stainless

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.

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Specification
Business Information

Dimensions & Specifications (Trade series (GN 615.8))

Thread sizeLength L (mm)Ball diameter (mm)Standard spring initial/end load (N)High-load spring initial/end load (N)Housing material
M51224.8 / 6.810 / 14blackened steel or AISI 303 stainless
M6142.56.3 / 1011 / 16blackened steel or AISI 303 stainless
M8163.516 / 2423 / 40blackened steel or AISI 303 stainless
M10194.518.8 / 31.728 / 54.3blackened steel or AISI 303 stainless
M12226.526 / 4939.5 / 77.3blackened steel or AISI 303 stainless
M16248.538 / 6850 / 88.7blackened steel or AISI 303 stainless

Applications & Industries for M12 Friction-Bearing Ball Spring Plungers

What Friction-Bearing Ball Spring Plungers are specified for, industry by industry. Stocked from M5 to M16.

Industries that specify Friction-Bearing Ball Spring Plungers

  • Drawer and slide hardware Ball contact that holds a small mechanism in position.
  • Assembly tooling Replaceable contact elements on changeover fixtures.
  • Positioning mechanisms Friction-bearing ball plungers for repeat contact on a moving surface.
  • Fixture plates Detent points where low rolling or sliding friction matters.
  • Agricultural & plant Implement connections made and broken in the field.
  • Gearboxes & housings Dowelled joints where the bolts clamp and the pins locate.

Typical applications

  • locating a slide without dragging a plain nose across the surface
  • matching ball diameter and housing material to repeated contact duty
  • providing a friction-bearing ball contact with a defined spring load
  • selecting standard or high-load initial and end-force values
  • locating two parts to a repeatable position
  • pivot and hinge joints loaded in shear

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 read initial and end spring force as a static clamp rating or structural preload.

Full application guide: where Friction-Bearing Ball Spring Plungers are used, how to specify them, and the cases they are wrong for

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 coarse-thread pitch of M12 for Friction-Bearing Ball Spring Plungers?

For M12 the standard coarse pitch is 1.75 mm — this is the value used for Friction-Bearing Ball Spring Plungers.

What clearance and tapping drill suit M12?

Use a 13.5 mm clearance hole (ISO 273 medium) for through-fixing, or a 10.2 mm tapping drill for a coarse M12 thread.

How do I request a quotation?

Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.