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Installation instructions for the gland Conditions
for threaded and unthreaded holes
Tolerance Class Tolerance class for Ex e is
Enclosure
material
limitations
Enclosure
interface
sealing method
Maximum
surface
roughness of
the enclosure
wall
Thickness
range for the
enclosure
wall (t)
Perpendicularity +/–1° or 0,2 mm at the
Permitted use
and location of
any earth tags
For chamfered
holes
Lock nuts
Recommended Torque Values
Threaded Holes
T1 = 3,0 N/m
T2 with red grommet = 3,5 N/m
T2 with black grommet = 5 N/m
DE, FR, NL, NO, SV, DA, FI, IT, ES, PL, RU, CZ, HU, CRO. Page 28-41.
24 | nVent.com/RAYCHEM
Threaded Holes
max. 6G/6H
The plastic gland is made
from flame retardant, high
impact resistant polyamide
If the sealing surfaces are
uneven, use PTFE washer
NFWM25 or the green fiber
washer GFWM25 (washers
to be ordered separately)
Ra 6,4 µm, better than
3,2 µm is recommended
≥ 4 mm
outer edge of the gland,
whichever is smaller
Earth tags should be
installed on the inside of the
enclosure
The outermost edge must
not have a greater diameter
than the center of the
washer
Only use nVent RAYCHEM
locknuts or types
recommended by the
manufacturer
Unthreaded (through) holes
Nominal thread size M25
–0,0 mm/ +0,2 mm (M)
The plastic gland is made
from flame retardant, high
impact resistant polyamide
If the sealing surfaces are
uneven, use PTFE washer
NFWM25 or the green fiber
washer GFWM25 (Washers
to be ordered separately)
Ra 6,4 µm, better than
3,2 µm is recommended
Minimum wall thickness:
Plastic enclosures ≥ 2 mm
Metal enclosures ≥ 1 mm
+/–1° or 0,2 mm at the
outer edge of the gland,
whichever is smaller
Earth tags should be
installed on the inside of the
enclosure
The outermost edge must
not have a greater diameter
than the center of the
washer
Only use nVent RAYCHEM
locknuts or types
recommended by the
manufacturer
Unthreaded holes with internal locknut
T1 = 3 N/m
T2 with red grommet = 3,5 N/m
T2 with black grommet = 5 N/m
T2
T1
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