Montessori Bolt Block Wing Nut

$ 19.99
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Unique, high quality Montessori Bolt Block handcrafted from maple wood. Varnished with non toxic water based finishes. Also available as a set of 3.

Practical Life Activity

This Montessori Practical Life activity is typically used in the 3-6 year old classroom. This material is used to develop and strengthen hand and finger muscles of the pincer grip. It is one of the many examples of how the design of Montessori materials indirectly prepare for a future skill – in this case for holding a pencil. In addition, the practical life aspect helps a child to learn how to thread, tighten and loosen a bolt and nut!

An excellent addition to any preschool or homeschool classroom that is both intriguing to children and develops concentration.

The wing nut is considered medium in difficulty, or Number 2 in the set of 3.


  • 3/8″  Bolt and corresponding Wing Nut with an oversized Washer
  • Base is approximately 2-3/8″ square (6cm) and 1″ thick (1cm) allowing it to be comfortably held in the hand

The wing nut is fun to grip and gives a different sensorial experience due to its unique shape.  Further develops finger dexterity and pincer grip.

Extension activity:

To add an element of challenge: once the nut is on the first few threads continue to spin the nut around the bolt using only one finger. This extension hones in on the hand eye coordination, fine motor skills and concentration.


One Bolt block

One Washer

One Wing Nut

Weight 0.25 kg
Dimensions 2.75 × 2.75 × 3.25 cm


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