026
66
THREADED
FITTINGS
The X Thread
Value Plastics X Series components have a tapered 10-32
thread that functions like a pipe thread. In comparison to
standard 10-32 UNF threaded fittings, the tapered design
works better with oversized ports and ports which are not
perpendicular to the face of the component.
The 120 degree chamfer under the hex provides a seal when
the fitting is tightened into a port with a countersink as
shown below. It also seals on the thread due to interference
on the pitch diameter. When using an elbow or tee, the
tapered thread tightens radially and facilitates directional
alignment of the barb.
Other Thread Series
K, B, C and D Series fittings, designed for use with 10-32
UNF ports, are straight-threaded components. These fittings
seal against the 120 degree chamfer under the hex on the
fitting and do not tighten radially as they are assembled. S
Series fittings are straight threaded components for 1/4-28
UNF ports, M5 Series are for M5 x .8 ports and M6 Series are
for M6 x 1 ports.
Part numbers for fittings with pipe threads are noted below.
Those for use with 1/16-27 NPT ports have part numbers
prefixed with 16; those for 1/8-27 NPT ports have part
numbers prefixed with 18; and those for 1/4-18 NPT ports have
part numbers prefixed with 14.
The features shown below must be incorporated into the port
when using our B, C, D, X, K, S, M5 and M6 Series fittings.
Failure to do so will jeopardize the performance of the seal
between the fitting and port. For applications in which this
seal is highly critical, we recommend that you contact a
sealant specialist.
When working with threaded parts, Value Plastics strongly
recommends that you test sample parts in your application.
Value Plastics
®
Thread Series
Dimension A
Thread Length
Clearance Needed
to Achieve
Chamfer Seal
Dimension B
Countersink
Diameter
Feature C
Internal Screw Thread
Series
X
.200”
.250”
.210”-.230”
10-32UNF2B
K,B,C,D
.156”
.200”
.210”-.230”
10-32UNF2B
S
.204”
.250”
.270”-.290”
1/4-28UNF2B
M5
.192”
.250”
.210”-.230”
M5X .8
M6
.235”
.375”
.270”-.290”
M6X 1
Threaded
FITTINGS
