3" 1502 EXL Wing Nut

Patent pending EXL wing nut designed to address fatigue failures at their source. Features full root radius on internal threads to minimize stress concentrations, extended forward-facing lugs to reduce cracking, and thicker lugs with larger outside diameter to extend life. Retrofittable to existing SPM products. Compatible with most existing hammer union connections of comparable size and pressure rating. Complies with pending API 7HU2 requirements. 235% increase in cycles prior to failure versus legacy design.