Flat Plate Fittings for 1-5/8” Strut

Unistrut is a complete framing system that consists of channel, fittings, channel nuts, and specialty items like trolleys and closure strips. 

With so many choices, it is easy to get overwhelmed, so this edition of Tech Talk is dedicated to flat plate fittings for 1-5/8” strut.

Whether you need a basic, flat fitting like the P1062 or larger fittings with multiple holes, the Unistrut catalog contains an entire lineup of items that will help make short work of your next project.  Each of the pages on our website dedicated to Unistrut flat plate fittings contains detailed product information on finishes, materials, sizes, and ordering information.  You’ll also find a submittal PDF for each part number.unistrut flat fittings pictorial guide

Below, are some quick additional pointers on 1-5/8″ compatible flat plate fittings for handy reference:

Fittings, unless noted, are made from hot-rolled, pickled and oiled steel plates, bar, strip or coil, and conform to one or more of the following specifications: ASTM specifications A575, A576, A635, A1011 SS GR 33, A1011 HSLAS GR 45 or A36. All fittings meet or exceed physical properties of ASTM A1011 GR 33. The pickling of the steel produces a smooth surface free from scale. Many fittings are also available in stainless steel, aluminum and fiberglass.

All parts drawings in the catalog and on our website illustrate only one application of each fitting. In most cases many other applications are possible. The channels shown in the illustrations are P1000, 15⁄8″ square, except where noted otherwise. All 9⁄16″ diameter holes use 1⁄2″ x 15⁄16″ hex head cap screws and 1⁄2″ nuts – P1010, P3010, P4010 or P5510 – depending on the channel used. Nuts and bolts are not included with the fitting and must be ordered separately.

Imperial dimensions illustrated in the catalog and on the web site are in inches, and metric dimensions are shown in parenthesis. Unless noted, all metric dimensions are in millimeters and rounded to one decimal place

Design load data, where shown, is based on the ultimate strength of the connection with a safety factor of 2.5, unless otherwise noted.

Bolt Torque for 1-5/8" Fittings
Bolt Size 1/4"-20 5/16" -18 3/8"-16 1/2"-13 5/8"-11 3/4"-10
Rec. Torque Ft/Lbs 6 11 19 50 100 125
Max Torque
7 15 25 70 125 135
Set Screw Torque for 1-5/8" Fittings
Bolt Size 1/4"-20 3/8"-16 1/2"-13 5/8"-11 3/4"-10 7/8"-9
Set Screw Torque Ft/Lbs 40 60 125 250 400 665
Links to Popular Flat Plate Fittings Available from Unistrut Service Company
P1028 P1031 P1036
P1062 P1065 P1066
P1067 P1334 P1356
P1358 P1380 P1380A
P1726 P1873 P1950
P1953 P1941 P2862

To learn more about flat plate fittings, consult page 81 of the General Engineering Catalog, or visit the Flat Plate 1-5/8″ Fittings section of our website.  And as always, to request pricing, or place an order, contact Unistrut Service Company for further assistance.