Consult factory for ordering information. Many Unistrut nuts, bolts and hardware items are also available in standard metric dimensions. Unless noted, all metric dimensions are in millimeters and rounded to one decimal place. Metric dimensions are shown in parenthesis or as noted. Imperial dimensions are illustrated in inches. Unistrut nuts and bolts are manufactured to meet the Unified Screw Thread standard, ANSI B1.1, coarse series (UNC) class 2. Many hardware items are also available in stainless steel. Hardware items such as Hex Nuts bolts and washers are Electro-Galvanized (EG), ASTM B633 Type III SC1 finish, unless otherwise noted.

If a flawless finish is desired, it is recommended to apply a matching touch up paint ***

*** Perma Green finish is a commercial grade finish, and as such scuffs and scratch marks are to be expected. Unistrut Defender™ (DF), conforming to ASTM A1059.Square weld nuts have more weld points than hex weld nuts for a stronger hold. To drive slotted inserts, you can use a slotted screwdriver instead of using an installation bit or a bolt and two nuts.

Hot-dipped galvanized (HG), conforming to ASTM A153 Choose from our selection of 7/16'-20 inserts, including over 80 products in a wide range of styles and sizes.

Electro-galvanized (EG), conforming to ASTM B633 type III SC1.

Proof Load 55KSI, Tensile Load 74 KSI Bolt Size of 99 of 99 Flexloc Nuts Full Height Light Hex Part Number Pre-Fix 20. Screws conform to SAE J429 GR 2 (exceeds ASTM A307). Nuts only, based on a vertical pull, not to any connecting bolt or stud. Unistrut channel nuts are manufactured from mild steel cold rolled coil, and after stamping and machining operations are completed, they are case hardened, assuring positive biting action into the inturned edge of the Unistrut channel.

716 20 slotted hex nut