2-6-S-03a and 2-6-S-03b
Little clips, also known as "gidgies." They are made of two different thicknesses of a non-magnetic metal. The screws are brass American No. 8, 15/16" length woodscrews meeting specifications that were current from the 1930s up until 1970 (TIGHAR Tracks, 18 (2002)). See also "Smelling for Gunsmoke."
Measurement of the holes in 2-6-S-03b
The shank of a #20 drill bit (4.09mm) passed easily through the larger hole. The shank of a #19 drill bit (4.22mm) would not. The shank of a standard #8 wood screw is specified as 0.164" (4.17mm). Because the item was recovered with an intact #8 screw, Jim Thompson assumed the hole size to be the same as the screw shank diameter.
The smaller hole is not strictly circular in shape. Instead, it appears elliptical or three-lobed. The exact shape is difficult to discern because the object has a "fold" or "bend" coincident with the hole.
The shank of a #29 drill bit (3.45mm) could barely pass through the hole. The shank of a #28 drill bit (3.57mm) would not