This is one Lot (Qty.2) New DAA_SHEEN SMA Female 2-Hole Flange Panel Mount with Extended Dielectric, 50 OHM. Part Number: U27-SMA02-AG. .
Here are the basic:
Insulator length: 0.125" (3.1mm)
Pin length: 0.15" (3.8mm)
2-Hole Flange size: 0.63" x 0.236" (16 x 6mm)
Distance between mounting holes: 0.481" (12.2mm)
Data Sheet Drawing:
http://www.rfbayinc.com/upload/files/data_sheet/parts/u27-sma02.pdf
This is the SMA Female connector used in RF Bay, Inc. product and many designer kit in my eBay store.