Uxcell a11053100ux0301 Female RF Coaxial Connector Straight (Pack of 5) Item name: pcb mount sma female rf connector Thread diameter: 6Mm/ 0.25"; contact pin distance: 4Mm/ 0.16" Pin size: 4 x 1 x 1Mm/ 0.16" x 0.04" x 0.04"(L*w*h)