Sometimes called load indicator washers or DTI washers, ASTM F959 washers are used to help determine when a structural bolt connection is installed to the correct tension. Traditional DTI washers employ a feeler gauge to measure the compression of raised nibs on the washer as the nut is tightened. The newer “Squirter” washer does away with the feeler gauge, using highly visible orange gel that squirts out when the correct tension has been reached. Atlantic Bolt carries many sizes and types of load indicator or tension indicator washers, including the squirter washer.

Squirter and standard load indicator washer

Atlantic Bolt, Inc. – DTI/ Load indicator washers/ ASTM F959

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Item number                       Description

LIW050G  1/2 LOAD INDICATOR WASHER MECHANICAL GALVANIZED
LIW050P  1/2 LOAD INDICATOR WASHER PLAIN
LIW062GS 5/8 LOAD INDICATOR WASHER MECH. GALV. SQUIRTER
LIW062P  5/8 LOAD INDICATOR WASHER PLAIN
LIW062PS  5/8 LOAD INDICATOR WASHER PLAIN
LIW075G  3/4 LOAD INDICATOR WASHER MECHANICAL GALVANIZED
LIW075GS  3/4 LOAD INDICATOR WASHER MECH. GALV. SQUIRTER
LIW075P  3/4 LOAD INDICATOR WASHER PLAIN
LIW075PS  3/4 LOAD INDICATOR WASHER PLAIN SQUIRTER
LIW087G  7/8 LOAD INDICATOR WASHER MECHANICAL GALVANIZED
LIW087GS  7/8 LOAD INDICATOR WASHER MECH. GALV. SQUIRTER
LIW087P  7/8 LOAD INDICATOR WASHER PLAIN
LIW087PS  7/8 LOAD INDICATOR WASHER PLAIN SQUIRTER
LIW100G  1 LOAD INDICATOR WASHER MECHANICAL GALVANIZED
LIW100GS  1 LOAD INDICATOR WASHER MECH. GALV. SQUIRTER
LIW100P  1 LOAD INDICATOR WASHER PLAIN
LIW100PS  1 LOAD INDICATOR WASHER PLAIN SQUIRTER
LIW112PS  1 1/8 LOAD INDICATOR WASHER PLAIN SQUIRTER
LIW125G  1 1/4 LOAD INDICATOR WASHER MECHANICAL GALVANIZED
LIW125GS  1 1/4 LOAD INDICATOR WASHER MECH. GALV. SQUIRTER
LIW125P  1 1/4 LOAD INDICATOR WASHER PLAIN
LIW125PS  1 1/4 LOAD INDICATOR WASHER PLAIN SQUIRTER
LIW150GS  1 1/2 LOAD INDICATOR WASHER MECH. GALV. SQUIRTER
LIW150PS  1 1/2 LOAD INDICATOR WASHER PLAIN SQUIRTER