An old Record / Stanley cap iron screw. This cap iron screw will fit old Stanley 2, 3, 4, 4 1/2, 5, 5 1/2, 6, 7,and 8 planes, old Record 02, 03, 04, 04 1/2, 05, 05 1/2, 06, 07, 08 and T5 planes and pretty much all planes which have been made to the same spec. as these planes.
Face Width: 16mm approx.
Thread Width: 7.5mm approx.
Condition: the cap iron will be similar in appearance to the photo.