MIL-DTL 38999 Type 257-255 Jam Nut Mount Hermetic Receptacle with Crimp Removable Socket Contacts, MIL-DTL-38999 Series I Type Shell Size Table I Basic Number 257-255 B Alternate Key Position A, B, C, D, E (N = Normal) Z1 9 - 35 N Material and Finish Insert Arrangement Per MIL-STD-1560 Z1 - CRES, Passivated Pin contact interferance 1.695 max Master key B dia 90° 185° .920 .910 ORing 5 D flat C 120° typ H thread A thread C Jam nut .219 min E .125 max panel APPLICATION NOTES 1. Assembly identified with manufacturer’s name and part number, space permitting. 2. Insert arrangements in accordance with MIL-STD-1560. 3. Glenair 257-255 receptacle connector is designed to mate with any QPL manufacturer’s MIL-DTL-38999 Series I plug connector having the same insert arrangement & polarization. 5. Material/finish: Shell, jam nut—CRES/passivated Supplied crimp removal socket contacts conform to M39029/57 6. Metric Dimensions (mm) are indicated in parentheses. 4. © 2009 Glenair, Inc. Pin contacts—nickel-iron alloy 52/gold Socket contacts—copper alloy/gold Insulator—fused vitreous glass/N.A. Insulators—high grade rigid dielectric/ N.A. Seals—pure fluorosilicone rubber/ N.A. CAGE CODE 06324 Printed in U.S.A. GLENAIR, INC. • 1211 AIR WAY • GLENDALE, CA 91201-2497 • 818-247-6000 • FAX 818-500-9912 www.glenair.com B-18 E-Mail: [email protected] MIL-DTL 38999 Type 257-255 Jam Nut Mount Hermetic Receptacle with Crimp Removable Socket Contacts, MIL-DTL-38999 Series I Type F dia HERMETIC LEAK RATE MOD CODES Designator Required Leak Rate –585A 1 x 10-10 cc’s Helium per second –585B 1 x 10-9 cc’s Helium per second –585C 1 x 10 cc’s Helium per second G B -8 Recommended Panel Cut-Out TABLE I: CONNECTOR DIMENSIONS SHELL SIZE A THREAD CLASS 2A B DIA ±.016(0.4) C FLATS ±.016(0.4) D FLAT ±.005(0.1) 9 .6875-24 UNEF 1.188(30.2) 1.062(27.0) .650(16.5) 11 .8125-20 UNEF 1.375(34.9) 1.250(31.8) .750(19.1) 13 1.000-20 UNEF 1.500(38.1) 1.375(34.9) .937(23.8) 15 1.125-18 UNEF 1.625(41.3) 1.500(38.1) 1.061(26.9) 17 1.250-18 UNEF 1.750(44.5) 1.625(41.3) 1.186(30.1) 19 1.375-18 UNEF 1.938(49.2) 1.812(46.0) 1.311(33.3) 21 1.500-18 UNEF 2.062(52.4) 1.938(49.2) 1.436(36.5) 23 1.625-18 UNEF 2.188(55.6) 2.062(52.4) 1.561(39.6) 25 1.750-18 UNS 2.312(58.7) 2.188(55.6) 1.686(42.8) TABLE I (CONTINUED): CONNECTOR DIMENSIONS © 2009 Glenair, Inc. SHELL SIZE E DIA ±.016(0.4) F DIA ±.005(0.1) G ±.005(0.1) H THREAD CLASS 2A 9 .109(2.8) .705(17.9) .665(16.9) .4375-28 UNEF 11 .109(2.8) .827(21.0) .764(19.4) .5625-24 UNEF 13 .109(2.8) 1.012(25.7) .950(24.1) .6875-24 UNEF 15 .109(2.8) 1.139(28.9) 1.079(27.4) .8125-20 UNEF 17 .140(3.6) 1.264(32.1) 1.203(30.6) .9375-20 UNEF 19 .140(3.6) 1.389(35.3) 1.328(33.7) 1.0625-18 UNEF 21 .140(3.6) 1.512(38.4) 1.454(36.9) 1.1875-18 UNEF 23 .140(3.6) 1.639(41.6) 1.579(40.1) 1.3125-18 UNEF 25 .140(3.6) 1.764(44.8) 1.704(43.3) 1.4375-18 UNEF CAGE CODE 06324 Printed in U.S.A. GLENAIR, INC. • 1211 AIR WAY • GLENDALE, CA 91201-2497 • 818-247-6000 • FAX 818-500-9912 www.glenair.com B-19 E-Mail: [email protected]