257-455
Box Mount Quadrax Connector
With PC Tails • MIL-DTL-38999 Series III Type
Contact Style
P - Pin, PC Tail Quadrax (100 Ohm)
S - Socket, PC Tail Quadrax (100 Ohm)
C - Pin, PC Tail Quadrax (150 Ohm)
D - Socket, PC Tail Quadrax (150 Ohm)
Basic Number
Shell Size
09
21
23
25
Finish
M - Electroless Nickel
NF - O.D. Cadmium
Alternate Key
Position
A, B, C, D, E
(N = Normal)
over Nickel
257 - 455 M 21 G 75 P N
Insert Arrangement
(See Opposite Page)
G = Ground Plane Option
(use “–” for none)
.235 Max
.175
Typ.
.125
.843 Max.
A Thread
2X D
.102
.075
Clinch Nut
Ref.
4x Chamfered
or Rounded
E
Potting Compound
A
B
D
C
B SQ.
2x C
BSC
Pin contact
See Detail A
On Adjacent Pg.
Shown for
Reference Only
.189
Typ
PCB Standoff
.520 Max
4x M3X0.5-6G Holes
.156 Deep @ 90° Apart
4x M3X0.5-6G
Fully Mated
Indicator
M
.005
Band - Red
Clinch Nut
4 Places
Mates With
ø .219 / .217
.219
.217
ø
.111 Typ
PCB Flex Print also Available. Consult Factory.
Mates With
ø .026 / .024
.026
.024
Pin
Socket
4x ø
APPLICATION NOTES
1. Assembly identified with Glenair’s, part number and date code
2. Insert arrangements IAW MIL-STD-1560 and Figure I
5. Material/finish:
Shell assembly, jam nut, lock ring—Al alloy/see Table II
Contacts—copper alloy/gold plate
3. Glenair 257-455 receptacle connector is designed to mate
with any QPL manufacturers MIL-C-38999 series III plug
connector having the same insert arrangement, polarization
and the same quadrax interface dimensions shown.
Bayonet pins—CRES/passivate
0-rings, interfacial & peripheral seals—silicone/N.A.
Insulators—high grade rigid dielectric/ N.A.
6. Metric Dimensions (mm) are indicated in parentheses
4. PC contacts supplied with connector (installed) and are not
sold seperately.
© 2010 Glenair, Inc.
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
E-Mail: sales@glenair.com
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