6 catalogued sizes, dimensioned to Trade series (GN 615.8). Pick any row and the technical drawing redraws to it.
Friction-Bearing Ball Spring Plungers to Trade series (GN 615.8) are catalogued in sizes M5 to M16, with long 12-24 mm, dia 2-8.5 mm. 6 sizes are held in the table below, and the technical drawing redraws to whichever row you select.
Standard
Trade series (GN 615.8)
Size range
M5-M16
Long
12-24 mm
Dia
2-8.5 mm
Catalogued sizes
6
Dimensions are nominal values from the governing standard. Confirm the tolerance class for your application before ordering.
Applications & Industries
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 hardwareBall contact that holds a small mechanism in position.
Assembly toolingReplaceable contact elements on changeover fixtures.
Positioning mechanismsFriction-bearing ball plungers for repeat contact on a moving surface.
Fixture platesDetent points where low rolling or sliding friction matters.
Agricultural & plantImplement connections made and broken in the field.
Gearboxes & housingsDowelled 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.
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 Friction-Bearing Ball Spring Plungers
The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.
Dimensions & Specifications (Trade series (GN 615.8))
Every row below is a starting point for the customizer above — pick any size and the drawing will redraw to that row.
Friction-Bearing Ball Spring Plungers (Trade series (GN 615.8)) are a type of pins used across industrial assembly. Below is the complete size table together with material, standard and application guidance.
What Are Friction-Bearing Ball Spring Plungers?
Friction-Bearing Ball Spring Plungers are pins defined by Trade series (GN 615.8). 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
Friction-Bearing Ball Spring Plungers are supplied to order. Pricing starts from approximately US$0.45 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.
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.
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.
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.
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 Friction-Bearing Ball Spring Plungers?
Friction-Bearing Ball Spring Plungers are manufactured to Trade series (GN 615.8). The dimensional values on this page follow that standard.
What sizes are available for Friction-Bearing Ball Spring Plungers?
The table on this page lists 6 sizes for Friction-Bearing Ball Spring Plungers, ranging from M5 to M16. Sizes outside the table can be quoted on request.
In which materials are Friction-Bearing Ball Spring Plungers supplied?
Friction-Bearing Ball Spring 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 Friction-Bearing Ball Spring 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.
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