Weatherhead fittings are oval in shape with flats on each side of fastener.

3/8" Drive Weatherhead Fitting Sockets:

Item No. Size Drive Description Length
53714 7/16" 3/8" Square Weatherhead Fitting Socket 1.1/4"
53716 1/2" 3/8" Square Weatherhead Fitting Socket 1.1/4"
53718 9/16" 3/8" Square Weatherhead Fitting Socket 1.1/4"
53720 5/8" 3/8" Square Weatherhead Fitting Socket 1.3/8"
53724 3/4" 3/8" Square Weatherhead Fitting Socket 1.1/2"
53727 27/32" 3/8" Square Weatherhead Fitting Socket 1.1/2"
Barcode # 9322159537185