The Hillman Group 3337 5/16-18 Square Nut Zinc Plated, 30-Pack

Product Description Hillman Square Nuts use four flat sides instead of six to give more wrench contact and a wide, flat bearing seat. Fitting a 5/16-18 coarse bolt, the square shape lets the nut sit flush against a flat surface or drop into a channel, slot, or wood recess where it grips and resists spinning, which is why square nuts are the classic choice for strut framing and older machinery. The anti-rotation is the point: when the nut seats against a rail or wedges into a slot, it cannot turn, so a bolt can be driven and tightened from the other side without holding the nut still with a second wrench. That makes square nuts fast to work with in channel, strut, and blind connections. Made from steel with a protective zinc plating, the square nut resists rust and corrosion for dependable indoor and light outdoor use. The plating keeps the threads clean and the flat seat secure over time, so a channel, sign, or machinery connection stays tight through handling and service. Use these square nuts for strut and channel framing, wood connections, machinery, sign and fixture mounting, and restoration work where a square nut seats flat or locks in a slot. They pair with a matching bolt and drop neatly into strut channel or a broached slot. This 30-piece pack provides a ready supply for building, mounting, and repair projects around the home, shop, and job site. From the Manufacturer A Square Nut is a four-sided nut that can be used in a channel or welded into place. Square nuts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening, but also a greater resistance to tightening as well. Square nuts are used along with flat washers in order to avoid damage from their sharp edges and help to increase the strength of the fastener.

• FOUR-SIDED ANTI-TURN NUT: This square nut has four flat sides that give more wrench contact and a wide, flat seat, so it grips well and resists spinning when it seats against a flat surface or drops into a channel, slot, or wood recess.
• SQUARE SHAPE SEATS FLAT: Fitting a 5/16-18 coarse bolt, the four sides let the nut sit flush against a rail or wedge into a slot so it cannot rotate, letting you tighten the bolt from the other side without holding the nut still.
• ZINC-PLATED STEEL: Made from steel with a protective zinc plating, the square nut resists rust and corrosion for dependable indoor and light outdoor use, holding a firm, flat-seated grip on channel, wood, and machinery over time.
• CHANNEL, STRUT, AND WOOD USE: Ideal for strut and channel framing, wood connections, machinery, sign and fixture mounting, and restoration work where a square nut seats flat or locks in a slot, a classic nut for building and repair.
• TRUSTED HILLMAN QUALITY: Hillman supplies dependable fasteners and hardware that homeowners and pros rely on for everyday projects. Keep these nuts on hand for assembly, mounting, and repair jobs around the home and shop.