Inch Size, Steel or Brass
Ball Knobs
Tapped Type
BK
BK
BK
 BK
Specification
Information
Hand knob, steel version: Steel, highly polished
Hand knob, brass version: Brass, highly polished, corrosion resistant in water
Tapped hole for mounting

 Highly polished steel and brass balls turned from solid
bar stock. Used on fixtures, machine tools, jigs and
assemblies.
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 Steel Type

Dimensions in:

inches
(millimeters)

Part Number
d1
d2 
Tapped
t1
.75
(19.1)
10-32
.38
10-24
.38
1
 (25.4)
10-32
.38
10-24
.38
1/4-20
.50
1/4-28
.50
5/16-18
.50
5/16-24
.50
3/8-16
.50
1.38
(35.1)
1/4-20
.63
1/4-28
.63
5/16-18
.63
3/8-16
.63
3/8-24
.63
7/16-20
.63
5/16-24
.63
1/2-13
.63
1/2-20
.63
1.88
(47.8)
3/8-16
.75
3/8-24
.75
1/2-13
.75
1/2-20
.75
5/8-11
.75
5/8-18
.75
 Brass Type

Dimensions in:

inches
(millimeters)

Part
Number
Diameter
Thread
Size
Thread
Depth
.75
(19.1)
10-32
.38
10-24
.38
1
(25.4)
10-32
.38
10-24
.38
1/4-20
.50
1/4-28
.50
5/16-18
.50
5/16-24
.50
3/8-16
.50
1.38
(35.1)
1/4-20
.63
1/4-28
.63
5/16-18
.63
5/16-24
.63
3/8-16
.63
3/8-24
.63
7/16-20
.63
1/2-13
.63
1/2-20
.63
1.88
(47.8)
3/8-16
.75
3/8-24
.75
1/2-13
.75
1/2-20
.75
5/8-11
.75
5/8-18
.75