Spring Plungers & Indexing Plungers

Spring plungers and indexing plungers are mechanical components used in a wide range of machine and fixture applications. The plungers are typically used for locking, positioning and locating pre-defined holes in projects. The plunger components come in a range of types, sizes and materials to suit your every requirement. There are two main types of plungers available, each suited to various different applications.

Index Plunger (with button, knob or pull loop)

Indexing plungers are made up of a threaded body, a plunger and come with or without actuating button or ring. The nose of the indexing plunger extends which holds it in place, When the handle or lift ring is pulled back the plunger is disengaged and the plunger retracts back into the body.

Spring Plunger (with a ball)

Spring plungers also known as ball plungers are mechanical parts that are used to secure, position index, positively lock off and apply pressure. The compact component is made up of a ball or pin and an internal spring, all contained in a housing that resembles a grub screw. The housings must be strong and are usually made from metals including steel, stainless steel or aluminium. Some spring plungers are also made of polyamide. Spring plungers are available in a range of thread sizes.

How to install

Spring and indexing plungers feature a variety of installation methods including internal, hexagon, slot and top slot.

Threads

Spring plungers are available in a wide range of thread sizes, to accommodate for various applications. At RS we offer indexing and spring plungers in a range of metric threads including M3, M4, M5, M6, M8, M10, M12, M16 and M20.

Materials

Our range of indexing and spring plungers are available in a wide range of materials to suit every application. Manufactured from high-quality materials resistant to solvents oils and greases. They include:

  • Aluminium
  • Stainless steel, or stainless steel with a nickel or zinc plating
  • Steel
  • Polyamide

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Description Price Thread Size Length Ball Diameter
RS Stock No. 478-652
BrandRS PRO
MYR123.94
1 Bag of 10
Bag(s)
M3 7.5mm 1.5mm
RS Stock No. 237-794
BrandRS PRO
MYR903.31
1 Bag of 10
Bag(s)
M16 75.5mm -
RS Stock No. 478-563
BrandRS PRO
MYR296.57
1 Bag of 5
Bag(s)
M16 27.5mm 10mm
RS Stock No. 237-407
BrandRS PRO
MYR710.89
1 Bag of 5
Bag(s)
M16 75.5mm -
RS Stock No. 478-743
BrandRS PRO
MYR146.26
1 Bag of 5
Bag(s)
M3 7.5mm 1.5mm
RS Stock No. 237-491
BrandRS PRO
MYR292.51
1 Bag of 5
Bag(s)
M12 45mm -
RS Stock No. 237-665
BrandRS PRO
MYR206.80
1 Bag of 5
Bag(s)
M8 44mm -
RS Stock No. 478-567
BrandRS PRO
MYR166.02
1 Bag of 5
Bag(s)
M4 9.8mm 2.5mm
RS Stock No. 478-747
BrandRS PRO
MYR156.28
1 Bag of 10
Bag(s)
M12 24.5mm 8mm
RS Stock No. 478-927
BrandRS PRO
MYR181.57
1 Bag of 5
Bag(s)
M6 15mm 3.5mm
RS Stock No. 478-753
BrandRS PRO
MYR305.92
1 Bag of 10
Bag(s)
M16 27.5mm 10mm
RS Stock No. 237-417
BrandRS PRO
MYR177.79
Each
units
M20 69mm -
RS Stock No. 237-564
BrandRS PRO
MYR394.74
1 Bag of 10
Bag(s)
M12 - -
RS Stock No. 237-817
BrandRS PRO
MYR269.91
Each
units
M20 69mm -
RS Stock No. 478-923
BrandRS PRO
MYR407.69
1 Bag of 5
Bag(s)
M20 34.5mm 12mm
RS Stock No. 237-687
BrandRS PRO
MYR358.84
1 Bag of 10
Bag(s)
M10 - -
RS Stock No. 237-388
BrandRS PRO
MYR344.84
1 Bag of 5
Bag(s)
M16 54mm -
RS Stock No. 478-636
BrandRS PRO
MYR137.76
1 Bag of 10
Bag(s)
M4 9.8mm 2.5mm
RS Stock No. 124-1905
BrandRS PRO
MYR27.727
Each (In a Pack of 3)
units
M8 20mm 4.7mm
RS Stock No. 124-1904
BrandRS PRO
MYR38.207
Each (In a Pack of 3)
units
M10 26mm 6.2mm