Jam Nut Mount • Metal or Composite
Ground Plane • 8GA • MIL-DTL-38999 Series III Type
Ground Plane
Option
G
= Outer Contacts
Grounded to Shell
––
= Standard Insulated
Contacts
Shell
Size
257-411
Twinax Receptacle Connector
Twinax and
Quadrax
Connectors
Basic Part Number
257-411
=
D38999 Series III Type
Twinax Connector
Finish Material
(See Table II)
Insert Designator
P
= Pin Insert
S
= Socket
A
= Less Pin Contacts/
Grommet Followers
B
= Less Socket Contacts/
Grommet Followers
257-411
XM
08
-
25
-
G
8
P
N
Connector Style
08
= Receptacle,
Jam Nut
Insert Arrangement
Dash Number
(See Page D-37)
(N for Normal)
2.000 (50.8) Max
Alternate Key
Position
A, B, C, D, or E
.890 (22.6) Max
1.280 (32.5) Max
2x U
Master Keyway
S Thread
.579/.555
(14.7/14.1)
Z
See Note 2
Y Thread
E
V Flat
Blue Color Band
(See Note 5)
Red Color Band
ØT
See Notes 3 and 4
.520 (13.2) Max
Fully Mated
Indicator Band Red
W Thread
Grommet Follower For
M17/176-00002 Cable (See
P/N Development).
Ref: Jacket OD .129 ± .005
Panel Thickness .126-.06 (3.2-1.5)
APPLICATION NOTES
1.
Material/Finishes:
Receptacle and Jam Nut - See Table II.
(Composite coupling is unplated).
Insulators - Aluminum alloy/Conductive plate
or high-grade thermoplastic.
Contact retainer clips - HT BeCu/Conductive plate.
Seals - Fluorosilicone/N.A.
Assembly to be identified with Glenair’s name, partnumber
and date code, space permitting.
Insert arrangements are in accordance with MIL-STD-1560
(See page D-37).
4.
5.
6.
7.
Insert arrangement shown is for reference only.
Blue color band indicates rear release retention system.
Ground plane performance: per Table II, between outer
contact and plug barrel (see part number development).
For P and S, receptacle is supplied with contacts P/N
M39029/90-529 (Pin) or M39029/91-530 (Socket) and
Grommet Follower P/N 687-643-8-1 (No spares/sealing plugs
provided).
Metric dimensions (mm)are in parentheses.
2.
3.
8.
© 2010 Glenair, Inc.
www.glenair.com
CAGE CODE 06324
Printed in U.S.A.
E-Mail: sales@glenair.com
GLENAIR, INC.
•
1211 AIR WAY
•
GLENDALE, CA 91201-2497
•
818-247-6000
•
FAX 818-500-9912
E-4
Jam Nut Mount • Metal or Composite
Ground Plane • 8GA • MIL-DTL-38999 Series III Type
TABLE I: MATERIAL/FINISH and GROUND PLANE
Sym
M
NF
XM
XW
Material
Aluminum
Composite
Finish
Electroless Nickel
Cadmium O.D. Over Electroless Nickel
Electroless Nickel
Cadmium O.D. over Electroless Nickel
Consult Factory for Additional Plating Options
Ground Plane
1 mV
2.5 mV
3.0 mV
3.0 mV
TABLE II: JAM NUT MOUNT
Shell
Size
9
21
23
25
S Thread
.6250-.1P-.3L-TS2A
1.3750-.1P-.3L-TS-2A
1.5000-.1P-.3L-TS-2A
1.6250-.1P-.3L-TS-2A
T
Dia
1.201 (30.5)
1.177 (44.9)
2.075 (52.7)
2.051 (52.1)
2.201 (55.9)
2.177 (55.3)
2.323 (59.0)
2.299 (58.4)
U
1.079 (27.4)
1.047 (26.6)
1.953 (49.6)
1.921 (48.8)
2.079 (52.8)
2.047 (52.0)
2.205 (56.0)
2.173 (55.2)
V
.655 (16.6)
.645 (16.4)
1.441 (36.6)
1.431 (36.3)
1.566 (39.8)
1.556 (39.5)
1.691 (43.0)
1.681 (42.7)
W Thread
M17 x 1.0-6g 0.100R
M38 x 1.0-6g 0.100R
M41 x 1.0-6g 0.100R
M44 x 1.0-6g 0.100R
Y Thread
M12 x 1.0-6g 0.100R
M31 x 1.0-6g 0.100R
M34 x 1.0-6g 0.100R
M37 x 1.0-6g 0.100R
.153 (3.9)
.114 (2.9)
Z
.122 (3.1)
.083 (2.1)
Ø AA
BB Flat
RECOMMENDED PANEL CUT OUT
(See Table III)
TABLE III: CUT-OUT
Shell
Size
09
21
23
25
AA Dia
Max
.710 (18.0)
.700 (17.8)
1.520 (38.6)
1.510 (38.4)
1.645 (41.8)
1.635 (41.5)
1.770 (45.0)
1.760 (44.7)
BB
.670 (17.0)
.660 (16.8)
1.460 (37.1)
1.450 (36.8)
1.585 (40.3)
1.575 (40.0)
1.710 (43.4)
1.700 (43.2)
© 2010 Glenair, Inc.
www.glenair.com
CAGE CODE 06324
Printed in U.S.A.
E-Mail: sales@glenair.com
GLENAIR, INC.
•
1211 AIR WAY
•
GLENDALE, CA 91201-2497
•
818-247-6000
•
FAX 818-500-9912
E-5
Twinax and
Quadrax
Connectors
257-411
Twinax Receptacle Connector
E
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