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Installation instructions for the gland
Conditions for threaded and unthreaded holes
Tolerance Class
Enclosure
material
limitations
Enclosure
interface sealing
method
Maximum surface
roughness of the
enclosure wall
Thickness range
for the enclosure
wall (t)
Perpendicularity
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 30-44.
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nVent.com/RAYCHEM
Threaded Holes
Tolerance class for Ex e is
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
+/–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 (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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