Allen head

Allen head

A screw having a hexagonally shaped recess in its head.
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All of the Beavertail HD reamers have replaceable, hardened steel Allen head nozzles to improve fluid flow.
* Allen Head, Queen's University; Lucy Qian Liu, International Monetary Fund; Guido Menzio, University of Pennsylvania and NBER; and Randall Wright, University of Wisconsin, Madison and NBER, "Sticky Prices: A New Monetarist Perspective"
Tap out the rear sight using a brass drift and plastic mallet, tap the adapter in place, center it and secure with an Allen head screw.
CATH ALLEN Head of Broadcast Development, BBC Cymru Wales
The head on the Little Goose has the same popular Allen head set screw adjustment system as other Scott releases giving it plenty of adjustment to lit a young shooter's small hands or Dad's massive paws comfortably.
In addition to the stock parts, the Verso-Tool removes Allen head grip screws, extended magazine buttons, two-piece guide rods and can be used to adjust most adjustable sights, including Bo-Mar.
Allen head set screw adjustment system as other Scott releases, giving it plenty of adjustment to comfortably fit a young shooter's small hands right up to Big Daddy's massive paws.
Ronnie Bowker (right) of Ernst & Young,m and Graham Allen head of museums with a Turner painting
That done, it is centered in the dovetail and the sight is attached with a single allen head screw with the wrench included.