Metallics JTLN3 Nuts 10-24 Hx Keps Locknut St-zn (Jar 100)

No. Each nut comes with an external tooth lock washer already attached and free to spin, so you set one piece instead of juggling a nut and a loose washer overhead. The washer measures 0.395 to 0.406 inch outside diameter.

No. The JTLN3 is not Buy American compliant and is not ARRA compliant, with multiple countries of origin. If your job carries a domestic sourcing requirement, you need a domestically produced 10-24 keps nut instead of this one.

The hex across the flats runs 0.362 to 0.375 inch, which is a 3/8 inch wrench or socket. Overall width across the washer is 0.413 to 0.433 inch, so allow that much clearance in a tight box or channel. Nut height is 0.117 to 0.130 inch.

They ship 100 to a jar, and the jar is the minimum order quantity. Jar weight is 0.39 lbs. Other sizes and quantities can be had by request.

The JTLN3 is steel with a zinc finish, which handles indoor and normally dry or occasionally damp locations. For sustained wet exposure, coastal air or washdown areas, step up to a stainless 18-8 keps nut instead; zinc plating will eventually rust through in those conditions.

The external tooth washer is what does that work: the teeth cut through paint and anodizing as you tighten, which is why keps nuts get used on bonding and ground screws. The nut is hardened to Rockwell C38-44, so the teeth hold their edge rather than flattening on the first turn.

They are catalogued for electrical, plumbing, heating and air conditioning use, so a mechanical contractor can standardize on the same 10-24 keps nut across trades rather than stocking separate fasteners per crew.

A keps nut resists loosening through the spring tension and bite of its attached toothed washer, which is adequate for general vibration on panels, enclosures and strut. For heavy, sustained vibration a nylon insert locknut or a serrated flange nut is the stronger hold. The JTLN3 trades some of that for speed, since there is only one piece to handle.