2b thread class right-hand 2.539" overall length 16 thread quantity per inch the following contacts are shorted together; a to f, b to g, c to h, l to p, m to q, n to r, u to w, y to b lower case, z to e lower case, a lower case to f lower case, v to j, s to j un thread series
2a single mounting facility thread class 0.810" overall length 0.400" overall width 40 single mounting facility thread quantity per inch unc single mounting facility thread series
