Avionic
Hold-Down Mechanisms
Secure line replaceable avionics with positive-locking
RAM Hold-Down Devices.
Features & Benefits
n Protect critical electronics from shock, vibration
and accelaration.
n Self-Locking and Load Limiting version.
n Tool or hand operation.
n ARINC 600 and MIL-F-85731 applications.
The Ram design team has developed a
complete family of ergonomically designed
ratcheting and ultra-lighweight clutching holddowns, hooks and hinges. All are built to resist
extremes in shock and vibration, yet they allow
quick change capability.
Our engineers are continuing to design smaller
units for higher loads to solve both your avionic box and printed circuit card hold-down problems. So let
Camloc/Ram be your problem solver... whether it’s loads in excess of 5000 lbs., clutching loads of 450 lbs.
or more...easy hand or tool operations...30 “G” shock loads or gunfire vibrations...ARINC 600 applications
or MIL-F-85731 (MS14108) requirements.
These pages detail the RAM Hold-Down Devices that will meet the requirements of most engineers.
However, if you don’t see a design in this catalog that will suit your application, consult one of our field
sales engineers for a solution to meet your specific needs.
Styles
Two major sub-divisions of hold-downs exist: Load Limiting and Self-Locking. Self-locking versions are
used for securing heavy loads, up to 5000 pounds. Load limiting are used to precisely control the insertion
and extraction of avionic devices with multi-pin connectors.
3° Extraction Angle...No Bent Pins.
1.
2.
3.
1. Hold-down in fuly clutched and seated position (3°-10°). 2. As extraction is begun, by turning
knob counterclockwise, the center shaft is pushed back and pivoted upward. Angle of shaft is
reduced to 3° before extraction occurs. 3. Full half-inch extraction takes place with no more than
3° of upward force placed upon avionics. Connector pins are never bent.
E-10
Avionic
Hold-Down Mechanisms
Typical Operation
Load Limiting Versions
Self-Locking Versions
1. To lock, lift assembly to clear HD13001 Series hook.
1. Assembly lifts to clear NAS 622 hook. Keeper is
rotated to captivate hold-down assembly to the hook.
Knob is rotated clockwise to seat the box in place.
Clutch mechanism will control the clamping force within
a rage of 100 to 140 pounds.
2. Rotate knob clockwise to engage hook with keeper .
Continue clockwise rotation to seat box.
E
2. Fully installed in locked position.
3. To unlock, rotate knob counterclockwise until keeper
clears hook. There is no need to pull back on knob to
release ratchet with RAM Hold-Down Devices.
Optional Head Styles
Hand and tool operated knob can be turned by hand or
torque wrench.
Hex head knob designed for torque wrench operation.
3. Shown here in the extraction mode. This is achieved by
simply turning the knob counterclockwise. T o release from
hook, keeper is pulled back and rotated 180° and assembly falls free.
Hand operated knob is easy to grip for high torque.
E-11
With Integral Hinges
Series
H D 12006
Dimensions
Material/
Finish
Knob:
416 CRES/
Passivate
Clevis Bolt:
PH 13-8 MO
CRES/
Dry Film Lube
Nosepiece:
PH 13-8 MO
CRES/Passivate
Dry Film Lube
Knob:
2024-T3511
Aluminum/
Hard Anodize
or 2024-T4
Aluminum/
Hard Anodize
Knob:
A356-T6
Aluminum/
Hard Anodize
Dimensions specified in inches (millimeters) and pounds (kilograms).
Note: Variables may not represent the same dimensions on all series numbers.
E-12
Self-Locking
Hold-Downs
Installation Reference - Typical
Ultimate
Load, lbs.
5500
(2,495)
Weight,
lbs.
A
B
Min Grip
C
DIA
0.16
---
---
---
(0.072)
D
Values per Diagram Above
E
F
G
0.904
(22.961)
0.904
(22.961)
45°
20°
Part
Number
HD12006-101
E
5500
(2,495)
5500
(2,495)
0.16
---
---
---
0.16
---
---
---
(0.072)
(0.072)
0.904
(22.961)
0.904
(22.961)
0.904
45°
20°
HD12006-102
0.904
45°
20°
HD12006-103
(22.961)
(22.961)
E-13
With Separate Hinges
Series
H D 12026
Dimensions
Material/
Finish
Knob:
2024-T35112
Hard Anodize
Clevis Bolt:
17-4PH
CRES/
Passivate
Nosepiece:
304 or 316
CRES/
Passivate
or
15-5PH
CRES/
Passivate
Spring:
17-7PH
CRES/
Passivate
Dimensions specified in inches (millimeters) and pounds (kilograms).
Note: Variables may not represent the same dimensions on all series numbers.
E-14
Self-Locking
Hold-Downs
Installation Reference - Typical
Ultimate
Load, lbs.
Weight,
lbs.
1000
0.15 Max.
(454)
(0.068)
A
2.03
(51.56)
2.41
(61.24)
2.91
(73.91)
2000
(907)
0.15 Max.
(0.068)
2.03
(51.56)
2.41
(61.24)
2.91
(73.91)
1000
(454)
0.20
(0.09)
Max.
2.03
(51.56)
2.41
(61.24)
2.91
(73.91)
2000
(907)
0.20
(0.09)
Max.
2.03
(51.56)
2.41
(61.24)
2.91
(73.91)
B
Min Grip
1.000
(25.400)
C
DIA
0.128
(3.251)
1.375
D
Values Per Diagram Above
E
F
G
0.418
± 0.020
0.418
± 0.020
± 0.508)
± 0.508)
(10.617
45°
20°
HD12026-102
1.875
HD12026-103
(47.625)
1.000
HD12026-101
(10.617
(34.925)
(25.400)
Part
Number
1.375
HD12026-105
1.875
HD12026-106
(34.925)
(47.625)
1.000
(25.400)
0.128
(3.251)
1.375
(34.925)
1.875
1.000
0.418
± 0.020
0.418
± 0.020
± 0.508)
± 0.508)
(10.617
45°
20°
HD12026-101 CP
(10.617
HD12026-102 CP
HD12026-103 CP
(47.625)
(25.400)
E
HD12026-104
0.160
(40.64)
0.160
(4.064)
HD12026-104 CP
1.375
HD12026-105 CP
1.875
HD12026-106 CP
(34.925)
(47.625)
E-15
With Separate Hinges
Series
H D 12023
Dimensions
Material/
Finish
Knob:
416 CRES/
Passivate
Clevis Bolt:
17-4PH
CRES/Passivate
Nosepiece:
15-5PH CRES/
Passivate
Spring:
17-7PH
CRES
H D 12017
Knob:
416 CRES/
Passivate
Clevis Bolt:
PH 13-8 MO
CRES/Passivate
Nosepiece:
17-4 PH CRES/
Passivate
Dimensions specified in inches (millimeters) and pounds (kilograms).
Note: Variables may not represent the same dimensions on all series numbers.
E-16
Self-Locking
Hold-Downs
Installation Reference - Typical
Ultimate
Load, lbs.
2000
(907)
Weight,
lbs.
0.17
(0.077)
A
B
Min Grip
C
DIA
2.130
–
0.160
0.163
(54.102)
( 44..014604 )
Values Per Diagram Above
D
E
F
G
0.418
0.418
±. 0.020 ±. 020
10.617
±0.508
45°
20°
Part
Number
HD12023-101
(10.617
± 0.508)
E
2000
(907)
3500
(1,588)
0.25
(0.113)
2.320
HD12023-102
(58.928)
Max.
0.17
(0.077)
3.30
(83.82)
1.20
(30.48)
0.160
0.163
( 44..014604)
0.75
(19.05)
–
32.50°
15°
HD12017-101
E-17
With Separate Hinges
Series
Dimensions
H D 12031
Material/
Finish
*Knob:
416 CRES/
Passivate
Clevis Bolt:
PH 13-8 MO
CRES/Passivate
Nosepiece:
17-4PH
CRES/Passivate
*Knob:
A356-T6
Aluminum/Hard
Anodize
*Knob:
2024
Aluminum/Hard
Anodize
H D 12032
Knob:
2024-73511
2024-T4
Hard Anodize
Clevis Bolt:
17-4PH
CRES/Passivate
Dry Film Lube
Nosepiece:
304 or 316
CRES/Passivate
or
15-5PH
CRES/Passivate
Dry Film Lube
Dimensions specified in inches (millimeters) and pounds (kilograms).
Note: Variables may not represent the same dimensions on all series numbers.
E-18
Self-Locking
Hold-Downs
Installation Reference - Typical
Ultimate
Load, lbs.
3500
Weight,
lbs.
0.16
B
Min Grip
C
DIA
2.80
–
0.160
0.163
(1,588)
(0.072)
(71.12)
3500
0.16
2.8
(1,588)
3500
(1,588)
2000
(907)
(0.072)
0.16
(0.072)
0.20
(0.090)
Max.
Values Per Diagram Above
D
E
F
G
A
(71.12)
2.80
(71.12)
2.03
(51.56)
2.41
(61.24)
2.91
(73.91)
( 44..014604)
–
1.000
(16.713)
0.658
45°
18°
HD12031-101
0.658
0.658
45°
18°
HD12031-102
0.658
(16.713)
0.160
0.163
(16.713)
(16.713)
0.658
45°
18°
HD12031-103
–
–
–
90°
HD12023-104
4.064
4.140
)
( 44..014604)
(25.400)
(16.713)
0.160
0.163
(
–
Part
Number
0.160
0.163
0.658
(16.713)
( 44..014604)
1.375
HD12023-105
1.875
HD12023-106
(34.925)
(47.625)
E-19
E
With Integral Hinges
Series
CA12096
Dimensions
Material/
Finish
Sleeve:
Glass Reinforced
Polyester Resin
Keeper and
Extractor:
Aluminum Alloy/
Anodize
Hinge Base:
Aluminum/
Anodize
Center Shaft:
CRES/Passivate
or 4130 Alloy
Steel/Cadmium
Plated
CA12145
Sleeve:
Glass Reinforced
Polyester Resin
Keeper,
Extractor and
Hinge Base:
Aluminum Alloy/
Anodize
Hinge Base:
Aluminum/
Anodize
Center Shaft:
CRES/Passivate
or 4130 Alloy
Steel/Cadmium
Plated
Dimensions specified in inches (millimeters) and pounds (kilograms).
Note: Variables may not represent the same dimensions on all series numbers.
E-20
Load Limiting
Hold-Downs
Load Diagram
Ultimate
Load, lbs.
500
(227)
Values Per Diagram Above
B
(C) Ref.
Weight,
lbs.
Clutch
Load, lbs.
A
0.15
120 ± 20
100 to 140
(0.07)
Max.
(54 ± 9)
(45 to 64)
31 to 43
(14 to 20)
-
Minimum
Extraction
Part
Number
0.05
CA12096-101
(12.70)
E
500
(227)
0.13
(0.058)
Max.
120 ± 20
(54 ± 9)
100 to 14
(45 to 64)
44 to 65
(20 to 30)
-
0.05
(12.70)
CA12145-102
E-21
With Integral Hinges
Series
HD11097
Dimensions
Material/
Finish
Sleeve:
Glass Reinforced
Polyester Resin
Keeper, Extractor
and Hinge Base:
Aluminum/
Anodize
Center Shaft:
CRES/Passivated
or 4130 Alloy
Steel/Cadmium
Plated
HD11098
Sleeve:
Glass Reinforced
Polyester Resin
Keeper, Extractor
and Hinge Base:
Aluminum/
Anodize
Center Shaft:
CRES/Passivated
or 4130 Alloy
Steel/Cadmium
Plated
Dimensions specified in inches (millimeters) and pounds (kilograms).
Note: Variables may not represent the same dimensions on all series numbers.
E-22
Load Limiting
Hold-Downs
Load Diagram
Ultimate
Load, lbs.
500
(227)
Values Per Diagram Above
B
(C) Ref.
Weight,
lbs.
Clutch
Load, lbs.
A
0.13
120 ± 20
100 to 140
(0.06)
Max.
(54 ± 9)
(45 to 64)
44 to 65
(20 to 29)
-
Minimum
Extraction
Part
Number
1.00
HD11097-101
(25.40)
E
500
(227)
0.13
(0.06)
Max.
150 ± 20
(68 ± 9)
130 to 170
(59 to 77)
71 to 93
(32 to 42)
-
0.05
(12.70)
HD11098-101
E-23
With Separate Hinges
Series
Dimensions
HD11006
Material/
Finish
Shaft:
PH 13-8MO
CRES/
Passivate Dry
Film, Lube
Knob:
A356-T6/
Hard Anodize
Hook Connector:
7-4 PH
CRES/Passivate
Extractor:
7075-T6/Anodize
Note: See Hold-Down Hinges page.
Dimensions specified in inches (millimeters) and pounds (kilograms).
Note: Variables may not represent the same dimensions on all series numbers.
E-24
Load Limiting
Hold-Downs
Load Diagram
Ultimate
Load, lbs.
2,000
(907)
Values Per Diagram Above
B
(C)
Weight,
lbs.
Clutch
Load, lbs.
A
0.42
150
150
(0.190)
Max.
With Hinge
(68)
500 ± 50
(227 ± 23)
(68)
Min.
500
---
---
Minimum
Extraction
Part
Number
0.05
HD11006-102
(12.70)
HD11006-103
(227)
Min.
E
E-25
Hold-Down Hinges
Dimensions
Fo r Ho ld -Do w n Ser ies :
H D 12026
H D 12023*
Material/ Weight,
Y
Finish
lbs.
Alloy Steel/
025
.130
Cadmium
(.011) (3.30)
Plated
Part Number
Hinge
Hinge Pin
0.197
0.450 HD12026-115
HD12026-123
(5.00) (11.430) HD13002-101*
B
A
.312
0.566 HD13019-101
(7.92) (14.376)
.162
(4.11)
.197
0.450 HD12026-117
(5.00) (11.430) HD13002-103*
.312
0.566 HD13019-103
(7.92) (14.376)
CRES/
Passivate
.025
(.011)
.130
(3.30)
0.197
0.450 HD12026-116
(5.00) (11.430) HD13002-102*
HD12026-124
.312
0.566 HD13019-102*
(7.92) (14.376)
.162
(4.11)
0.197
0.450 HD12026-118
(5.00) (11.430) HD13002-104*
.312
0.566 HD13019-104*
(7.92) (14.376)
Alloy Steel/
Cadmium
Plated
.035
(.016)
.130
(3.30)
0.197
(5.00)
0.150 HD12026-119
(35.10) HD13003-101*
HD12026-123
.312
1.62 HD13020-101*
(7.92) (41.148)
.162
(4.11)
0.197
(5.00)
0.150 HD12026-121
(35.10) HD13026-103*
.312
1.62 HD13020-103
(7.92) (41.148)
CRES/
Passivate
.035
(.016)
.130
(3.30)
0.197
(5.00)
0.150 HD12026-120
(35.10) HD13003-102*
HD12026-124
.312
1.62 HD13020-102
(7.92) (41.148)
* Note for HD12023 Series Hold-Downs
use Hinges:
HD13002,
HD13003,
HD13019, or
HD13020
Fo ld Ho ld -Do w n Ser ies :
H D 12031
.162
(4.11)
0.150 HD12026-122
(35.10) HD13003-104*
.312
1.62 HD13020-104
(7.92) (41.148)
6061-T6
Aluminum
Alloy/
Anodize
Dimensions specified in inches (millimeters) and pounds (kilograms).
Note: Variables may not represent the same dimensions on all series numbers.
E-26
0.197
(5.00)
.060
(.027)
.162
(4.11)
.205
1.00 HD13024-101
(5.207) (25.40)
HD14005-101
Hold-Down Hinges
Hinge Dimensions
Fo r Ho ld -Do w n Ser ies :
HD11002
Fo r Ho ld -Do w n Ser ies :
HD11003
Fo r Ho ld -Do w n Ser ies :
HD11006
Material/
Finish
Weight,
lbs.
17-4PH
Stainless
Steel/
Passivate
.030
(.013)
Max.
(22.86) (12.70)
17-4PH
Stainless
Steel/
Passivate
.030
(.013)
Max.
(25.40) (12.70)
303
CRES/
Passivate
Part Number
Hinge
Hinge Pin
Y
B
A
.90
0.50
1.00
(25.40)
HD13008-101
1.00
0.50
1.40
(35.56)
HD13009-101
.030
(.013)
Max.
0.128
(3.25)
D i a.
.196 1.200
(4.98 5.08)
1.12
(28.45)
CA12084-101
17-4PH
Stainless
Steel/
Passivate
.040
(.018)
Max.
(25.40) (35.05)
1.00
1.38
1.00
(25.45)
HD13011-101
17-4PH
Stainless
Steel/
Passivate
.040
(.018)
Max.
(25.40) (14.73)
1.00
.58
1.40
HD13012-101
7050 T.73511
Aluminum
Alloy/
Anodize
Weight
lbs.
A
1.364
(34.64)
.090 1.630
(.040) (41.40)
Max.
(25.45)
HD13021-101 MS20392-2R
S t r ai g h t P i n
an d
.125 0.163 .125
MS24665-1012
(3.17) (15.57) (3.17)
C o t t er P i n
B
.160
(4.06)
C
D
0.434 .160 HD13021-102
(11.02) (4.06)
E-27
Hold-Down
Hook Supports
Selected
Hold-Down Series
Hinge Dimension
H D 12023
H D 12026
HD11002
HD11003
-
C A 12090
C A 12145
HD11006
HD11098
-
H D 12031
Material/
Finish
Weight. X Dia.
lbs.
4140 Alloy
Steel/
Cadmium
Plated
.020
(.009)
17-4 CRES/
Passivate
(.009)
(4.95)
4140 Alloy
Steel/
Cadmium
Plated
17-4 CRES/
Passivate
-
HD13001-101
HD13001-102
.195
-
HD13001-103
HD13001-104
.020
(.009)
.169
(4.29)
-
HD13001-105
HD13001-106
.020
(.009)
(4.95)
.195
-
HD13001-103
HD13001-108
.020
-
-
MS14108*
.020
-
-
N A S 622*
.025
(.011)
0.211
(5.36)
thru
C’Sink
100° X
0.395
0.310
(7.87)
.020
(.009)
PH13-8MO
CRES/
Passivate
Heat Treat
to 220,000
PSI Min.
H D 12006
Hook Support
Part Number
.169
(4.429)
(.009)
PH13-8MO
CRES/
Passivate
Heat Treat
to 180,000
PSI Min.
A
HD13023-101
HD13023-102
17-4 CRES/
Passivate
(.014)
.032
0.219
0.310
HD13000-102
17-4 CRES/
Passivate
(.014)
.032
0.219
0.360
HD 13000-101
.020
0.156
0.380
HD13006-10
(5.56)
(5.56)
(7.87)
(9.14)
A-286 Steel/
Passivate
HD11000
Dimensions specified in inches (millimeters) and pounds (kilograms).
Note: Variables may not represent the same dimensions on all series numbers.
E-28
15-5PH
CRES/
Passivate
(.009)
(3.96)
(9.65)
* Available at local
distributor .