Loos and Company Military Specification Pulleys
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All Pulleys conform to MIL-DTL-7034

All military specification (mil-spec) pulleys conform to MIL-DTL-7034 (latest rev). We offer the industry’s leading products for use in a variety of applications, 
and these pulleys are no different.  Military specification pulleys are used in primary and secondary flight control systems, and will exceed the performance
of commercial pulleys in many applications. When quality and performance matter, trust Loos and Company to provide the highest quality mil-spec pulleys.

Department of Defense Specifications

Mil Spec Pulley Specifications

Military Specification Series Pulleys

The tables below represents standard materials, constructions, and sizes that we offer. As a manufacturer, we are fully capable
of making custom products. If you don't see what you are looking for contact a sales representative for assistance.

MS20219

Pulley | Groove | Secondary Control | Aircraft
OD IR
OD
IR
Width
Groove
DIA
Cable
Size
Bore
DIA
Pulley
Assembly
Max
WT, LBS
Allowable
Load on
Pulley
LBS
Max Limit Load on Cable
independent of wrap angle
Item#
1/8"
Cable
5/32"
Cable
1.3120.4230.4381.00 1/16"
5/32"
0.250 0.058480307460Non-metallic
MS20219-1
Metallic
MS20219A1
1.7500.4230.4381.438 1/16"
5/32"
0.250 0.066480307 460Non-metallic
MS20219-2
Metallic
MS20219A2
1.7500.7690.4381.438 1/16"
5/32"
0.625 0.096480307460Non-metallic
MS20219-3
Metallic
MS20219A3
2.6250.4260.4382.312 1/16"
5/32"
0.250 0.110480307460Non-metallic
MS20219-4
Metallic
MS20219A4
2.6250.7690.4382.312 1/16"
5/32"
0.625 0.125480307460Non-metallic
MS20219-5
Metallic
MS20219A5

MS20220

Pulley | Groove | Secondary Control | Aircraft
OD IR
OD
IR
Width
Groove
DIA
Cable
Size
Bore
DIA
Pulley
Assembly
Max
WT, LBS
Allowable
Load on
Pulley
LBS
Max Limit Load on Cable
independent of wrap angle
Item#
1/8"
Cable
5/32"
Cable
3/16"
Cable
1.7500.4550.6251.750 1/8"
5/32"
3/16"
0.3125 0.0705003071040 1250Non-metallic
MS20220-1
Metallic
MS20020A1
3.0000.4550.6253.000 1/8"
5/32"
3/16"
0.3125 0.17516803071040 1250Non-metallic
MS20220-2
Metallic
MS20020-A2
4.2500.4550.6254.250 1/8"
5/32"
3/16"
0.3125 0.260250030710401250Non-metallic
MS20220-3
Metallic
MS20220-A3
5.5000.4550.6255.500 1/8"
5/32"
3/16"
0.3125 0.370250030710401250Non-metallic
MS20220-4
Metallic
MS20220-A4

MS20221

Pulley | Groove | Secondary Control | Aircraft
OD IR
OD
IR
Width
Groove
DIA
Cable
Size
Bore
DIA
Pulley
Assembly
Max
Wt, LBS
Allowable
Load on
Pulley
LBS
Max Limit Load on Cable
independent of wrap angle
Item#
3/16"
Cable
7/32"
Cable
1/4"
Cable
2.6250.4550.6252.0003/16"
7/32"
1/4"
0.3125 0.165 2500262030603500Non-metallic
NA
Metallic
MS20221A1
4.1250.7680.7503.500 3/16"
7/32"
1/4"
0.500 .4504900 2620 30603500 Non-metallic
MS20221-2
Metallic
MS20221A2
5.6250.7680.750 5.000 3/16"
7/32"
1/4"
0.500 .6807000262030603500Non-metallic
MS20221-3
Metallic
MS20221A3

MS24566

Pulley | Groove | Anti-friction Bearing
OD IR
Width
Bore
DIA
Cable
Size
Groove
DIA
Groove
Radius
Width @
Flange
Points
Flange
Thickness
Pulley
Assembly
WT, LBS
Allowable
Load on
Pulley
Item #
1.2500.297 0.1901/16"
3/32"
0.9720.050
+0.000
-0.003
0.250
+0.000
-0.003
0.060
+-0.005
0.026 300MS24566-1B
2.500.297 0.1901/16"
3/32"
0.2220.112
+0.000
-0.003
0.250
+0.000
-0.003
0.060
+-0.005
4,900 500MS24566-2B
2.0000.484 0.2501/8"
5/32"
3/16"
1.510 0.112
+0.000
-0.005
0.422
-0.000
-0.012
0.086
+-0.006
0.090 600MS24566-3B
3.5000.484 0.2501/8"
5/32"
3/16"
3.010 0.112
+0.000
-0.003
0.422
+0.000
-0.012
0.086
+-0.006
0.200 1200MS24566-4B
5.0000.620 0.3753/16"
7/32"
1/4"
4.374 0.145
+0.000
-0.005
0.507
+0.000
-0.014
0.092
+-0.007
.5003000MS24566-5B
6.0000.620 0.375 3/16"
7/32"
1/4"
5.374 0.145
+0.000
-0.005
0.507
+0.000
-0.014
0.092
+-0.007
.600 4000MS-24566-6B