S9407-AB-HBK-010 Datasheet, PDF (78/276 Pages) Glenair, Inc. – HANDBOOK OF SHIPBOARD ELECTROMAGNETIC SHIELDING PRACTICES

S9407-AB-HBK-010, Rev. 2
5.4.3 Conduit-Gripping Mechanism
The illustrations of end fittings and couplings, figures 5-1 through 5-8, show a slotted ferrule
as the conduit-gripping mechanism, but any other simple method that meets the performance
requirements is acceptable.
5.4.4 Overlap Length
The overlap length "L" in the illustrations of end fittings and couplings indicates the minimum
length of conduit required by the conduit-gripping mechanism to function properly.
5.4.5 Minimum ID
The minimum inside diameter of end-fittings and of conduit couplings shall not be less than
the minimum inside diameter of the associated conduit.
5.4.6 Knurl Length
The total length of a knurl may consist of either one wide band (as illustrated in the figures) or
two or more narrow bands of knurls located close to each other.
5.4.7 Standard Thread Sizes
Table 5-2 lists a series of standard thread sizes which have been selected for mating between
end-fittings and adapters. A single thread size is associated with each size of end-fitting, and each
size of end-fitting is associated with only one size of conduit. Thus, any size conduit can be
terminated at a variety of connectors, hull fittings, etc., by means of its associated end-fitting and the
proper adapter. The thread classes shall be Class 2A and 2B for the male and female threads,
respectively. They shall be constructed according to the standards set forth in Handbook H28 (Part
1).
Table 5-2. Standard Thread Sizes for End-Fittings and Adapters
STANDARD SIZE CONDUIT
Conduit
Part
Number
Conduit Size
(Nominal ID)
(inches)
Conduit OD
(Over Braid)
EM02
EM03
EM04
EM05
EM06
EM08
EM10
EM12
EM16
EM20
EM24
1/4
3/8
1/2
5/8
3/4
1
1-1/4
1-1/2
2
2-1/2
3
0.42 ± 0.01
0.54 ± 0.01
0.69 ± 0.01
0.82 ± 0.01
0.94 ± 0.01
1.25 ± 0.01
1.50 ± 0.01
1.75 ± 0.01
2.28 ± 0.015
2.78 ± 0.015
3.28 ± 0.015
END-FITTING
ADAPTER
B
Thread
(Class 2B)
C
Thread
(Class 2A)
0.4375 -28
0.5625 -24
0.6875 -24
0.8125 -20
0.9375 -20
1.250 -18
1.5625 -18
1.875 -16
2.375 -16
2.875 -16
3.375 -16
UNEF 0.4375 -28 UNEF
UNEF 0.5625 -24 UNEF
UNEF 0.6875 -24 UNEF
UNEF 0.8125 -20 UNEF
UNEF 0.9375 -20 UNEF
UNEF 1.250 -18 UNEF
UNEF 1.5625 -18 UNEF
UN 1.875 -16 UNEF
UN 2.375 -16 UNEF
UN 2.875 -16 UN
UN 3.375 -16 UN
5-4