Square Washers

Square Washers

Square Washers

Category : Washers

As name suggests, square washers have square body with round hole in the center for the engagement of bolt or screws. Square washers are have larger surface bearing area than flat round washers and thus they develop more friction when tightened. These type of washers are specified for seismic applications. BoltPort produces square washers in metric and imperial sizes with wide range of material options and customization.

Zinc plated steel, stainless steel and hardened alloy steel are most commonly used for manufacturing square washers.


Sizes and Threads

Forming : Hot & Cold Punched
Size : M6 to M100 in Metric, 1/4" to 4" in Imperial
Thickness : Standard and Custom
Standards : DIN, ASME, ISO & IS

Dimension Standards

DIN 434, DIN 435, DIN 436, DIN 6918, PN 82018, UNI 6598, CSN 21739, PN 82009, UNI 5717,PN 82010, UNI 6596, CSN 21724

Manufacturing Grades (Other)

High Tensile Grade 8.8, 10.9, 12.9, Stainless Steel, 304, 316, 316ti, 321, 904L, Duplex 2205, S31803, Super Duplex, 2507, S32750, F55, S32760, Zeron 100, Inconel 600, 601, 625, 718, 925, Incoloy 800, 800, 800ht, 825, Hastelloy B2, B3, C22, C276, C2000, X, Monel 400, R405, K500, Titanium Grade 2, 5, 7, 9, 12, 23, Copper Nickel, Silicon Bronze, Aluminum & Phosphor Bronze, Tantalum, etc.

ASTM Specifications

ASTM A36, ASTM A167, ASTM A240, ASTM A283, ASTM A387, ASTM A516, ASTM A572, ASTM A829, ASTM A633, ASTM A656, ASTM B127, ASTM B162, ASTM B171, ASTM B209, ASTM B424, ASTM B463, ASTM B551, ASTM B749, ASTM B755, etc.

Compatibility (Other)

Product / Thread System Heavy Hex Bolts Heavy Hex Nuts Hardened Heavy Washers
Imperial ASME B18.2.1 ASME B18.2.2 ASME B18.21.1
Metric ASME B18.3.6M ASME B18.4.6M ASME B18.22M
Metric DIN 6914 DIN 6915 DIN 6916