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Phone: 713-939-8903
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Insulation Products: Washers, Caps & Nuts: Self-Locking Washers (Square)


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Subelt Stud Welding Self-Locking Washers are used in conjunction with Sunbelt Stud Welding weld pins, insul-anchors and lacing anchors to fasten insulation in place. Simply press the self-locking washer onto the pin up against the insulation until the desired position is reached and then clip off, or bend over, the remaining portion of pin for a permanent attachment.

The choice between Round or Square self-locking washers is basically a matter of aesthetics or personal preference. The domed, multi-lanced hole design provides for ease of locating washer on pin and positive self-locking. Some styles of washers are manufactured with a beveled edge to prevent the washer from cutting into the insulation facing.

Sunbelt Stud Welding Self-Locking Washers are available according to the chart below and with standard 10 GA, 12 GA, or 14 GA hole sizes off-the-shelf. Other material/plating combinations and hole sizes are available by special order.


TYPE K250 K150S K125
SIZE 2-1/2 x 2-1/2 1-1/2 x 1-1/2 1-1/4 x 1-1/8
THICKNESS .015 nom. .015 nom. .015 nom.
MATERIAL Mild Steel Mild Steel Mild Steel
PLATING Galvanized Galvanized Galvanized
EDGES/FLAT OR BEVELED beveled beveled beveled
OTHER MATERIALS AVAILABLE Alum., S.S. Alum., S.S. Alum., S.S.
PACKED PER CARTON 1000 3000 1000, 5000
SHIPPING WEIGHT PER 1,000 28 - 1/2 lbs. 10 lbs. 6 lbs.