Miniature Pushbuttons
OPTIONAL ACCESSORIES
AT494 Protective Guard
For Square & Round
(not for Barrier type)
Assembled
Cap Height
(7.0)
.276
(1.2) R
.047
Series KB
AT4024 Protective Guard
For Rectangular
(not for Barrier type)
Assembled
Cap Height
(9.0)
.354
(5.1)
.201
(7.0)
.276
(1.2) R
.047
(12.3) Dia
.484
(9.0)
.354
(12.3) Dia
.484
(19.0)
.748
(6.5)
.256
(11.5)
.453
(1.6)
.063
(19.0) Sq
.748
(6.5)
.256
(11.5)
.453
(23.5)
.925
Cover Material: Polycarbonate
Base Material: Polyamide
Panel Thickness Range: .020” ~ .268” (0.5 ~ 6.8mm) for Bushing Mounting; .020” ~ .091” (0.5 ~ 2.3mm) for Snap-in Mounting.
Protective Guards reduce the depth of switch behind panel by .047” (1.2mm).
ASSEMBLY INSTRUCTIONS
Cap Removal & Installation
For alternate action models cap must be in UP position for cap
removal. Indentations on opposite sides of the cap provide an
easy way to lift the cap out of the holder, using either the finger
nails, or cap extractor AT109.
Cap Replacement
Note that the cap has a pair
of round tabs and a pair of
long tabs which should be
used for correctly replacing
the cap in its holder. Using
the long tabs as guides,
slide the cap with the long
tabs moving into the slots
on opposite sides of the cap
holder. Then, the round tabs
will snap into notches on the
other two sides of the holder.
Cap
Indentation
Long Tab
Notch
Round Tab
Slot
AT109 Cap Extractor
LEGENDS
Easily create and submit your own legends using our new on-line Legend Maker.
Visit www.nkkswitches.com
For other legend support options, customers may either contact the factory and request the EB Legend Packet,
or utilize the general information and basic specifications presented below.
Suggested Printable Area for Lens
LM
T
AR
ST
Recommended Methods:
Laser Etch on clear lens, Screen Print
or Pad Print on lens.
Epoxy based ink is recommended.
(10.08) (11.6)
.397 .457
(10.08) Sq
.397
(11.6) Sq
.457
(0.76) Typ
.030
(10.08) Dia
.397
(11.6) Dia
.457
(0.76) Typ
.030
(0.76)Typ
.030
(14.58)
.574
(16.1)
.634
(0.76) Typ
.030
Shaded areas are printable areas.
Additional Method:
Maximum depth for engraving is .012” (0.3mm) on the cap lens.
Enamel paint is recommended to fill the engraved area.
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
NKK [ NIHON KAIHEIKI INDUSTRY CO. LTD. ]
