The Wood Works Book & Tool Co.
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Insert, Threaded, Brass, 3/8 inch x 16tpi, dozen

Threaded solid brass inserts which have a right hand, wood style, outer thread and a standard machine internal thread - either Metric Standard or Whitworth/UNC. Offers knock-down ability. All inserts are best seated using a mandrell as below. The zinc
Item Code: H3913
$ 45.08
+ -


The external threads on these inserts do not follow any standard that I am aware of and threading taps are unavailable

All the metric inserts listed below are internally threaded to a Metric Coarse thread pitch which is the commonly used standard.

These pitches respectively are are:

  • M3 x 0.5mm
  • M4 x 0.7mm
  • M5 x 0.8mm
  • M6 x 1.0mm
  • M8 x 1.25mm
  • M10 x 1.5mm

All inserts are best seated using a mandrell as below.  The zinc versions can be seated using a up-scale allen key.  The brass inserts have a slot for an insertion tool which we don't offer. We do not suggest the use of a screwdriver which may chew up brass inserts.

Inserts can be inserted at an angle.  A pre-drilled, angled, landing flat assists with this, drilled with either a forstner or spade bit.

Inserts Table 2


A suggested insertion arbor

Inserts Arbor

Click HERE to see a comprehensive data sheet.


Size/weight/qty 3/8 inch x 16tpi- doz.

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