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Self-Locating Projection Weld Nuts

Self-Locating Projection Weld Nuts
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710 SELF-LOCATING PROJECTION WELD NUTS BULLETIN WN

The engineered projections of PEM weld nuts prevent burnouts in thin sheets Round head of PEM brand weld nuts eliminates tedious, timeconsuming indexing. Compact PEM weld nuts fit on narrow flanges. Look for the PEM trademark on all cataloged sizes. Self-locating shanks of PEM weld nuts eliminate the need for pilots and complex electrodes. The self-locating shanks not only properly position the weld nuts but they also protect threads from weld spatter and thereby eliminate secondary operations such as retapping to remove spatter. WN-2 PennEngineering • www.pemnet.com PEM® weld nuts (Types...

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M E T R I C U N I F I E D INSTALLATION 1. With a PEM weld nut inserted in the properly sized hole (see above), bring the electrode force up sufficiently to clamp the projections of the fastener firmly against the sheet without embedding any portion of the projections. Be sure the electrodes are centered, and that the electrode faces are flat so that the force is applied evenly to all three projections. 2. Set the current or heat regulator on the low side and adjust along with the weld time until a good weld is produced. For mild steel, which has a medium electrical resistance, there is a...

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M E T R I C U N I F I E D M E T R I C U N I F I E D PERFORMANCE DATA(1) GUIDES TO BETTER WELDING Electrodes, weld nuts, and panels must be clean and free of grease, rust, and metal burrs. When welds appear satisfactory on installed nut, but pushout values are low, one or more of the following may be the cause: (1) Ram pressure too high. (2) Current too low. (3) Panel not clean. (4) Weld nuts not centered under electrodes. (5) Hold time not long enough to allow proper cooling. (6) Pressure regulator on welding equipment drifts. If installed threads are distorted, the following singly or in...

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