CATALOG NUMBER Dimensions (inches)
Mounting Hole Sizes Steel Sizes
TMSA-10 9/16
x 1-1/2 slots (2)

1/4 x 1-1/2
TMSA-12 9/16 x 1-1/4 slots (3) & 9/16
diameter (1)
3/8 x 1-1/2
TMSA-15 9/16
x 2-1/4 slots (2)
5/16 to 1-1/4
TMSA-27 9/16 x 1-1/4 slots (3)
& 9/16 diameter (1)
5/16 to 1-1/2
TMSA-34 9/16 x 1-1/2 slots (2) 3/8 to 1-1/2

OPTIONAL MOUNTING HARDWARE: Consists of ½” x ¾” or ½” x 1″ with galvanized steel hex head machine bolts, split lockwashers, and flat washers. These items are plastic bagged and attached to the bracket. The letters “GH” must be added to the catalog number. Examples: TMSA-27GH (for bracket with galvanized hardware).



For mounting surge arresters to overhead distribution transformer and regulator tanks. They are furnished with equipment mounting hardware for mounting arresters and optional bracket mounting hardware for fastening the bracket to the tank bolt pad.

MATERIAL: A36 hot rolled steel. All bolts, nuts and washers are steel.
FINISH: Hot dip galvanized per ASTM A-153.

EQUIPMENT MOUNTING HARDWARE: Consists of 1/2″x2″ galvanized steel carriage bolt, hex nut, split lockwasher and external tooth lockwasher. The TMSA-27 is furnished with a flat washer in place of the tooth lockwasher.