Grommet D
GD*
Grommet D
• Environmental Protection
• MIL-C-4308 Compatibility
• Reliability and Versatility
GD* connectors are ideal for aerospace, mili-
tary, telecommunications and other
applications requiring protection and high
reliability.
ITT Cannon developed GD* connectors to
meet the needs of the avionics industry.
These connectors provide high-density and
moisture protection.
Environmental protection is accomplished by
the resilient grommet, interfacial seal, and
bonded connector components.
Performance and Material Specifications
MATERIALS AND FINISHES
Materials
Shell
Low carbon steel per ASTM-A-620
Contacts
Copper alloy
Finishes
Yellow chromate over cadmium per QQ-P-415,
Type II, Class 2
Standard finish: Gold over nickel
Military finish: Gold 50 microinches thickness
per MIL-G-45204, Type II, Grade C, Class 1,
over copper per MIL-C-14550
Passivated per QQ-P-35
Float Mount Hardware Stainless Steel
Grommets and Seals
Silicone elastomer or Fluorosilicone
Bonding Material
Epoxy
MECHANICAL FEATURES
Wire Accommodation – Contact: #20, #22, #24 AWG.
Wire O.D. .071 (1.80) maximum, .038 (0.97) minimum.
Contact Retention – 9 lbs. minimum (40N) after 10 insertions
ELECTRICAL DATA
Test voltage AC RMS 60 Hz
Sea Level
20,000 Ft.
50,000 Ft.
70,000 Ft.
Average Flashover
1,000
1,000
500
500
Test
1,000
650
325
325
Maximum Current Carrying Capacity of Contacts – #20 Contacts: 5 Amps
Temperature Range – -65°C to +150°C (-53.9°F to +302°F)
C
D Sub
How to Order
GD
SERIES PREFIX
SHELL SIZE
MOUNTING TYPE
CONTACT ARRANGEMENT
CONTACT TYPE
MODIFICATION
MOUNTING TYPE
No designator – .120 (3.05) Diameter Mounting Holes
Y – Float Mount for Rear and Front Panel Mounting
CONTACT ARRANGEMENTS
Std. Density 9, 15, 25, 37 and 50
Hi Density 15, 26, 44, 62, 78
MODIFICATIONS
(Typical Modifiers)
FO – Connectors supplied Less Contacts
See D*MA modifiers, page C-8.
CONTACT TYPE
P
– Pin, crimp termination
S
– Socket, crimp termination
B
-
25
P
**
SERIES PREFIX
GD – Grommet D
SHELL SIZE
E, A, B, C, D
Dimensions shown in inches (mm)
Specifications and dimensions subject to change
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C-37
Grommet D
GD*
Standard Shell Dimensions
M
B•
10˚TYP.
B'
D'
L
K
J
G
MAX. OVER
GROMMET
H
+
+
D• E
+
+
TWO HOLES
.120 + .005 (3.05 + 0.13) DIA.
_
_
Rear
C
A
Front
X MAX.
Shell with Float Dimensions
.031 (0.79)
+ .005 (0.13)
_
.130 (3.30) MAX.
.049 (1.24)
MAX.
B•
B'
10˚TYP.
D•
E
OVERALL FREE
FLOAT .004 - .012
(0.10) - (0.30)
Y-Float Mount
.089 (2.26) + .003 (0.08)
_
DIA.
WASHER
D'
.031 (0.79) TOTAL
DIAMETRICAL FLOAT
G
MAX. OVER
GROMMET
Over
H Shell
TWO HOLES
.089 (2.26) + .003 (0.08)
_
Rear
C
C
A
Front
RIVET
D Sub
It is recommended that only one assembly, either pin or socket, be float mounted. For front panel mounting use reverse float mounted.
Shell Size
GDE-9P
GDE-9S
GDA-15P
GDA-15S
GDB-25P
GDB-25S
GD-37P
GD-37S
GDD-50P
GDD-50S
A
±.015
(0.38)
1.213 (30.81)
1.213 (30.81)
1.541 (39.14)
1.541 (39.14)
2.088 (53.03)
2.088 (53.03)
2.729 (19.32)
2.729 (19.32)
2.635 (66.92)
2.635 (66.92)
B•
±.005
(0.13)
B’
±.005
(0.13)
C
±.005
(0.12)
D•
±.005
(0.13)
D’
±.005
(0.12)
E
±.015
(0.38)
G
Max.
H
±.010
(0.25)
.422 (10.72)
.422 (10.72)
.422 (10.72)
.422 (10.72)
.422 (10.72)
.422 (10.72)
.422 (10.72)
.422 (10.72)
.534 (13.56)
.534 (13.56)
J
±.010
(0.25)
.030 (0.76)
.030 (0.76)
.030 (0.76)
.030 (0.76)
.039 (0.99)
.030 (0.76)
.039 (0.99)
.030 (0.76)
.039 (0.99)
.030 (0.76)
K
±.006
(0.13)
.235 (5.97)
.243 (6.17)
.235 (5.97)
.243 (6.17)
.230 (5.84)
.243 (6.17)
.230 (5.84)
.243 (6.17)
.230 (5.84)
.243 (6.17)
L
±.010
(0.25)
.045 (1.14)
.045 (1.14)
.045 (1.14)
.045 (1.14)
.060 (1.52)
.045 (1.14)
.060 (1.52)
.045 (1.14)
.060 (1.52)
.045 (1.14)
M
±.085
(0.13)
.422 (10.72)
.429 (10.90)
.422 (10.72)
.429 (10.90)
.426 (10.82)
.429 (10.90)
.426 (10.82)
.429 (10.90)
.426 (10.82)
.429 (10.90)
X
Max.
.718 (18.24)
.718 (18.24)
.718 (18.24)
.718 (18.24)
.718 (18.24)
.718 (18.24)
.718 (18.24)
.718 (18.24)
.718 (18.24)
.718 (18.24)
.666 (16.91) .984 (24.99)
—
—
.643 (16.33)
.984 (24.99)
.994 (25.24) 1.312 (33.32)
—
—
.971 (24.66)
1.312 (33.32)
1.534 (38.96)1.852 (47.04)
—
—
1.511 (38.38)
1.852 (47.04)
2.182 (55.42) 2.50 (63.50)
2.50 (63.50)
2.159 (54.84)
2.079 (52.81)2.406 (61.11)
—
—
2.406 (61.11)
2.064 (52.42)
—
.329 (8.36) .494 (12.55) .750 (19.05)
.311 (7.90)
.494 (12.55) .750 (19.05)
—
—
.329 (8.36) .494 (12.55) 1.093 (27.76)
.311 (7.90)
.494 (12.55) 1.093 (27.76)
—
—
.329 (8.36) .494 (12.55) 1.625 (41.28)
.311 (7.90)
.494 (12.55) 1.625 (41.28)
—
.329 (8.36) .494 (12.55) 2.270 (57.66)
.311 (7.90)
.494 (12.55) 2.270 (57.66)
— .411 (11.20) .605 (15.37) 2.162 (54.91)
.423 (10.74) —
.605 (15.37) 2.162 (54.91)
*dimensions B, D, and H are measured as
outside dimensions at the bottom of draw.
NOTE:
B• and D• are the outside dimensions for socket side, B’ and D’ are
the inside dimensions for pin side.
High Density Layouts available.
Dimensions shown in inches (mm)
Specifications and dimensions subject to change
C-38
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Grommet D
GD*
Test Data
GD* connectors meet all applicable requirements of MIL-C-24308. The following are exerpts from ITT Cannon Test Can-
non Test Report C82-78 applicable to environmental D-Subminiature GD* series connectors. Refer to MIL-C- 24308 Test
Extracts on page 385.
Test
Test
Description
Method
Moisture Resistant MIL-STD-1344
Method 1002.1 Type II
Results
1. No deterioration of performance.
2. Insulation resistance greater than 100 megaohms.
3. No evidence of flashover or breakdown during 1000 VAC
DWV testing.
20 hours immersion in hydraulic
1. No detrimental damage.
fluid per MIL-L-23699.
2. Able to meet requirements of mating and
unmating test.
Two hours immersion in tap water While still immersed, the mated connectors exceeded
at a depth of 36.00 (914.40) in
100 megaohm insulator resistance and exhibited no
mated condition, per MIL-STD 810, evidence of breakdown or flashover during 1000 VAC
Method 512, Procedure 1.
(RMS) DWV testing.
Fluid Immersion
Immersion
Design Features
• Resilient silicone grommets for wire sealing
• Interfacial seals
• Closed-entry socket contacts
• Bonded components to prevent moisture
• Uses M39029 type contacts and termination tool-
ing
• Intermateable with most M24308 type connectors
• Rear-release crimp contacts
• LITTLE CAESAR
®
contact retention assembly
• Optional sealing plugs, ITT Cannon part number
CLOSED ENTRY
SOCKET
BONDING
SEALING PLUG
(OPTIONAL)
C
SHELL
FRONT
D Sub
INSULATOR
CONTACT
RETAINING
CLIP
SHELL
REAR
GROMMET
Socket Connector
INSULATOR
PIN
CONTACT
BONDING
SEALING PLUG
(OPTIONAL)
SHELL
FRONT
INTERFACIAL
SEAL
CONTACT
RETAINING
CLIP
SHELL
REAR
GROMMET
Pin Connector
Note: Crimp Contacts: See page C-13
Dimensions shown in inches (mm)
Specifications and dimensions subject to change
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C-39
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