Twinax and
Quadrax
Connectors
GLENAIR, INC. • 1211 AIR WAY • GLENDALE, CA 91201-2497 • 818-247-6000 • FAX 818-500-9912
Printed in U.S.A.
www.glenair.com
CAGE CODE 06324
© 2010 Glenair, Inc.
E-Mail: sales@glenair.com
E-12
E
257-455
Box Mount Quadrax Connector
With PC Tails • MIL-DTL-38999 Series III Type
Basic Number
G = Ground Plane Option
(use “–” for none)
257 - 455 M 21 G 75 P N
Finish
M - Electroless Nickel
NF - O.D. Cadmium
over Nickel
Shell Size
09
21
23
25
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)
APPLICATION NOTES
1. Assembly identied with Glenair’s, part number and date code
2. Insert arrangements IAW MIL-STD-1560 and Figure I
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.
4. PC contacts supplied with connector (installed) and are not
sold seperately.
5. Material/nish:
Shell assembly, jam nut, lock ring—Al alloy/see Table II
Contacts—copper alloy/gold plate
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
Alternate Key
Position
A, B, C, D, E
(N = Normal)
A
D
CB
4x Chamfered
or Rounded
4x M3X0.5-6G
Clinch Nut
4 Places
B SQ. 2x C
BSC
A Thread
Pin contact
Shown for
Reference Only
.520 Max
Fully Mated
Indicator
Band - Red
.843 Max.
.102
.075
.235 Max
.175
.125 Typ.
Clinch Nut
Ref.
Potting Compound
See Detail A
On Adjacent Pg. .189
Typ
2X D
PCB Standoff
4x M3X0.5-6G Holes
.156 Deep @ 90° Apart
.111 Typ ø .219
.217
4x ø .026
.024
Mates With
ø .219 / .217
Mates With
ø .026 / .024 Socket
Pin
.005 M
PCB Flex Print also Available. Consult Factory.
Insert Arrangement
(See Opposite Page)
Twinax and
Quadrax
Connectors
GLENAIR, INC. • 1211 AIR WAY • GLENDALE, CA 91201-2497 • 818-247-6000 • FAX 818-500-9912
Printed in U.S.A.
www.glenair.com
CAGE CODE 06324
© 2010 Glenair, Inc.
E-Mail: sales@glenair.com
E-13
E
257-455
Box Mount Quadrax Connector
With PC Tails • MIL-DTL-38999 Series III Type
TABLE I
Shell
Size A Thread B Sq. C Bsc. D Bsc. ø E
Min.
09 .6250-.1P-.3L-TS-2A 1.031
1.007 .719 .594 .656
21 1.3750 -.1P-.3L-TS-2A 1.575
1.545 1.250 1.221 1.421
23 1.5000 -.1P-.3L-TS-2A 1.701
1.677 1.375 1.360 1.546
25 1.6250 -.1P-.3L-TS-2A 1.823
1.799 1.500 1.475 1.672
CA
DA
NA
AA
BA
Figure 1
Master Keyway Position
Face View Shown
Insert Arrangement Does
Not Rotate With Master Keyway
D
CB
A
F
E
DC
B
A
H
G
F
ED
C
B
A
Arrangement 09-5 Arrangement 21-75 Arrangement 23-06 Arrangement 25-08
1
2
3
4
Orientation
Key / Keyway
45°
.250 (CL of Ground Legs)
.111
Typ
.021 x .025
Rear View of Differential Quadrax
Orientation
Key / Keyway
45° ø .250 BC
ø .039 Min.
4x Equally
Spaced
ø .030 Min
4x .111
Typ
Recommended PCB Layout
2
3
4
1
C
BSC 4x .130 Min.
C
BSC
ø E Min.
Back Panel Mounting
See Quadrax Contact Information on D-24