MIL-DTL 28840 M28840/9 45 EMI/RFI Environmental Backshell Style Designator Military A - EMI / Environmental Dash Number Designator B - Environmental M28840/9 16 W A Material and Finish Designator W - Aluminum, Cadmium Plate, Olive Drab over Electroless Nickel B D - Corrosion Resistant Steel, Cadmium Plate, Black .75 D (19.1) A Thread Max D B C 2.25 BACKSHELL STYLE A (57.2) .12 (3.0) D .75 (19.1) A Max Thread X Cable D Range B C Y BACKSHELL STYLE B X Cable Range Y 2013 Glenair, Inc. Shipboard Interconnect and Conduit CAGE Code 06324 Rev. 090117 Printed in U.S.A. GLENAIR, INC. 1211 AIR WAY GLENDALE, CA 91201-2497 818-247-6000 FAX 818-500-9912 www.glenair.com E-Mail: sales glenair.com B-28M28840/9 45 EMI/RFI Environmental Backshell Backshell Dash A B C D Size Number Designator Thread Max. Diameter Max. Diameter Max. A 01 A (11) .750-20 UNEF 1.028 (26.11) B A 02 B (13) 1.188 (30.18) 1.031 (26.19) .875-20 UNEF 1.141 (28.98) B 03 B (13) A 04 C (15) B 05 C (15) 1.438 (36.53) 1.156 (29.36) 1.00-20 UNEF 1.263 (32.08) C 06 C (15) D 07 C (15) A 08 D (17) B 09 D (17) 1.125-18 UNEF 1.387 (35.23) 1.688 (42.88) 1.281 (32.54) C 10 D (17) A 11 E (19) 1.250-18 UNEF 1.513 (38.43) B 12 E (19) A 13 F (23) B 14 F (23) 1.438-18 UNEF 1.703 (43.51) 1.938 (49.23) 1.406 (35.71) C 15 F (23) A 16 G (25) B 17 G (25) 1.562-18 UNEF 1.825 (46.35) C 18 G (25) D 19 G (25) 2.188 (55.58) 1.531 (38.89) A 20 H (29) 1.875-16 UN 2.143 (54.43) B 21 H (29) 2013 Glenair , Inc. Shipboard Interconnect and Conduit CAGE Code 06324 Rev. 090117 Printed in U.S.A. GLENAIR, INC. 1211 AIR WAY GLENDALE, CA 91201-2497 818-247-6000 FAX 818-500-9912 www.glenair.com E-Mail: sales glenair.com B-29 MIL-DTL 28840