Inch Size, Phenolic Plastic
Four-Prong Knobs
with Tapped Insert

FPK

FPK

RoHS Compliant

  FPK

Specification
Hand knob: Black phenolic plastic (for D310 and D305,
material is nylon)
Tapped insert: Brass, molded-in
Additional thread sizes available upon request.

Information
FPK four-prong knobs are a popular choice for light duty finger tightening applications.
Heat resistance of phenolic plastic:
Maximum heat resistance 300° F (149° C)
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Dimensions in:

inches
(millimeters)

Part
Number
A
Thread
Thread
Depth
B
C
1.25
(31.8)
10-32
.38
(9.7)
.88
(22.4)
.50
(12.7)
1.19
(30.2)
1/4-20
.38
(9.7)
.88
(22.4)
.50
(12.7)
1.50
(38.1)
1/4-20
.38
(9.7)
1
(25.4)
.63
(16)
5/16-18
.50
(12.7)
3/8-16
.50
(12.7)
2
(50.8)
1/4-20
.50
(12.7)
1
(25.4)
.88
(22.4)
5/16-18
.50
(12.7)
3/8-16
.50
(12.7)
3
(76.2)
5/16-18
.50
(12.7)
1.13
(28.7)
.88
(22.4)