This part is a kind of semiconductor called SM4041.

Function of this product has N-N M/M 18GHZ FLANGE ADAPTER.

Manufacturers : FAIRVIEW MICROWAVE

Image and pinout :

Some of the text within the PDF file :

N-N M/M 18GHZ FLANGE ADAPTER (26.4) 1.04 in SPECIFICATIONS ELECTRICAL FREQUENCY: 0-18 GHZ IMPEDANCE: 50 OHMS VSWR: 1.15:1 MAX 1.93" (49.0) 5/16" MAX PANEL MECHANICAL MATERIALS BODY PASS STAINLESS STEEL MATERIALS CONTACTS BeCu PLATING: Au MIL-G-45204 INTERFACE: MIL-STD-348A DURABILITY: 500 CYCLES MIN ENVIRONMENTAL TEMP: -65 TO +125 DEG C MEASUREMENTS BELOW ARE TYPICAL .718 (18.2) 1.000 SQ (25.4) FAIRVIEW MICROWAVE INC. ALLEN, TX 75013 WWW.FAIRVIEWMICROWAVE.COM TITLE N-N M/M 18GHZ FLANGE ADAPTER SIZE CAGE CODE DWG NO AALL DIMENSIONS IN inches(MM) Typical 3FKR5 SCALE SHEET REV A [ ... ]

SM4041 PDF Datasheet Download