Description Drive Style External Hex Hex Nut Profile Standard Locking Type Serrations Fastener Strength Rating Low Material Zinc-Plated Steel Thread Size 4-40 Width 1/4“ Height 5/32“ Flange Diameter 25/64“ Thickness 0.02″ Nut Type Flange, Hex, Locknut Performance Vibration Resistant System of Measurement Inch Thread Direction Right Hand Thread Fit Unified Standard Class 2B Thread Spacing Coarse Thread Type UNC Country of Origin Canada, China, Germany, India, Italy, Japan, Mexico, Taiwan, Thailand, United States, Vietnam DFARS Compliance Specialty Metals COTS-Exempt ECCN EAR99 REACH Compliance REACH (EC 1907/2006) (01/23/2024, 240 SVHC) Compliant RoHS Compliance RoHS 3 (2015/863/EU) Compliant Schedule B Number 731816.0000 USMCA Qualifying No Serrations bite into material for mild vibration resistance while the flange eliminates the need for a separate washer. These nuts are ideal for securing screws in oversized or irregularly shaped holes since the flange covers a larger area than standard nuts. You can reuse them over and over without sacrificing strength, however, the serrations may mar the surface of your material. Also known as collar nuts. Low–Strength Steel—About half the strength of medium-strength steel nuts, these are suitable for light duty fastening applications, such as securing access panels. Use them with screws that have a similar strength rating to avoid stripping threads during installation. Zinc–Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.
