contact data, spdt, 2.0 amp resistive, 1.0 amp inductive at 28v dc, time delay on pull in 1.1 sec, operating voltage, 19 to 21v dc polarized, hermetically sealed, 4 no. 4/0.112 in./-40 thd mtg studs on 0.625 in. by 0.875 in. mtg centers, over-all dim. 2.580 in. 69 by 1.000 in. h by 1.250 in. h; tested for navigational control systems