... drom 10mm to 13mm. 2)Guaranteed quality, favorable price. hammer nuts HS001-HS006: Bracket(length and width varies from ... 19mm to 40mm)HS007-HS013: Philip head hammer nuts(specification: M6*10,M6*11,M6*13,M6 ... , 1/4*13 Material:Znic alloy )HS014-HS017: Slotted hammer nuts(Specification M5*10,M6*11,M6*13,5/16 ... M6*13, M6*13 Material: Iron)HS020-HS024: Slotted hammer nuts(M6*13,1/4*16,8*9.8,9 ...