Bild Ground Joint Air Hammer Complete Female Markets Mining Jump to Section Product Options Related Products Product Options Part Number Female Thread Size Female Thread Material GDF6 1/2" NPT Plated Iron/Steel GDF8 3/4" NPT Plated Iron/Steel GDF10 3/4" NPT Plated Iron/Steel GDF12 1" NPT Plated Iron/Steel Related Products Bild Boss® Clamp 4 Bolt Type, 2 Gripping Fingers Bild Ground Joint Air Hammer Double Spud Bild Ground Joint Air Hammer Female Spud Bild Ground Joint Air Hammer Male Spud Bild Ground Joint Air Hammer Stem Bild Ground Joint Air Hammer Wing Nut