• Special underhead serration prevents loosening
• Zinc plated
• Smaller-than-standard hex head is ideal for tight spaces
• Contains 1/4"-20 x 1/2" (14 pieces) 5/16"-18 x 3/4" (4 pieces)
• Uniform clamping pressure for an ultra gasket seal

Special underhead serration prevents loosening Zinc plated Smaller-than-standard hex head is ideal for tight spaces Contains 1/4"-20 x 1/2" (14 pieces) 5/16"-18 x 3/4" (4 pieces) Uniform clamping pressure for an ultra gasket seal