| CPC F21V 17/12 (2013.01) [F21S 8/022 (2013.01); F21V 15/015 (2013.01); F21V 17/06 (2013.01); F21W 2111/06 (2013.01)] | 19 Claims |

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1. A threaded insert for an airfield light fixture comprising:
a top end and a bottom end;
a cylindrical wall running between the top and bottom ends of the threaded insert;
a lip integral with the cylindrical wall proximate the bottom end of the threaded insert, wherein the lip has a diameter greater than the diameter of the cylindrical wall;
an opening proximate the top end of the threaded insert and extending throughout the cylindrical wall to form a cavity between the interior of the cylindrical wall and the lip;
a plurality of protrusions extending radially from the exterior of the cylindrical wall; and
a tapered portion proximate the end of the cylindrical wall opposite the lip, wherein the cavity extending throughout the cylindrical wall and tapered portion has a substantially uniform radius and the exterior of the tapered portion forms an angle with the plane of the cylindrical wall; and
wherein the interior of the cylindrical wall is threaded.
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