Inch Size, Phenolic Plastic
Ball Knobs
With Tapped Insert or Molded-in Threads
PBH
PBH
RoHS Compliant

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PBH
Specification
Information
Ball knob: Black phenolic plastic, glossy finish
Tapped insert: Brass, molded in
Plain thread: Molded in
Alternate version with molded-in threads

 Plastic ball knobs can be used on machine tools, jigs, fixtures, and a variety of other equipment.
For certain minimum quantities, other colors are available upon request.
Maximum heat resistance of phenolic plastic: 150°C (300°F).
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 Tapped Insert Type

Dimensions in:

inches
(millimeters)

Part
Number
A
D
Tapped
Thread
Depth
B
C
.75
(19.1)
6-32
.31
.70
(17.8)
.38
(9.7)
8-32
.31
10-24
.31
10-32
.31
1/4-20
.38
1
(25.4)
10-32
.31
.97
(24.6)
.50
(12.7)
1/4-20
.44
1/4-28
.44
5/16-18
.44
5/16-24
.44
3/8-16
.50
3/8-24
.50
1.19
(30.2)
1/4-20
.44
1.13
(28.7)
.56
(14.2)
5/16-18
.44
5/16-24
.44
3/8-16
.50
3/8-24
.50
Part
Number
A
D
Tapped
Thread
Depth
B
C
1.42
 (36.0)
1/4-20
.44
1.30
(33.1)
.63
(16)
5/16-18
.44
5/16-24
.44
3/8-16
.50
3/8-24
.50
7/16-20
.50
1/2-13
.63
1/2-20
.63
1.50
(38.1)
5/16-18
.63
1.52
(38.6)
.64
(16.3)
3/8-16
.63
1.63
(41.4)
5/16-18
.44
1.58
(40.1)
.69
(17.5)
5/16-24
.44
3/8-16
.50
3/8-24
.50
7/16-20
.50
1/2-13
.63
1/2-20
.63
1.88
(47.8)
3/8-16
.50
1.80
(45.7)
.75
(19.1)
3/8-24
.50
1/2-13
.63
1/2-20
.63
 Molded-in Thread Type

Dimensions in:

inches
(millimeters)

 
Part
Number
A
D
Thread
Thread
Depth
B
C
1.50
(38.1)
1/4-20
1
1.23
(31.2)
.63
(16.0)
1.5
(38.1)
1/2-13
1.13
1.23
(31.2)
.63
(16.0)
1.88
(47.8)
3/8-16
.63
1.80
(45.7)
.75
(19.1)
3/8-24
.63
5/8-18
.88