JACKS AND PLUGS
FAX: 773 792-2129 1/4" LOCK-EXTENSION JACKS AND PLUGS
* Please visit the product pages on our website for the most up-to-date product information
1/4" LOCK-EXTENSION JACKS AND PLUGS
155
Number 133
FEATURES
Modified Littel-Plug ? phone plug, 2- or 3-conductor, with
coupling ring that can be threaded to thread projection of
mating panel jack or to threaded end of the Lock-Extension
Jax ? . Locks connection after plug has been fully inserted
into its mating panel jack or Extension Jax ? .
Lock-Plug ? makes proper contact to mating jack without
tightening or attaching coupling ring, when rapid disconnect
may be desired. Lock-Plug fits any standard jack with 3/8".-32
thread bushing with .094" of the bushing exposed. Lock-
Extension Jax also will mate properly with standard phone
plugs, where no “lock” requirement exists.
Number 298
SPECIFICATIONS
Lock-Plug Tip Rod, Body, Handle and Coupling Ring:
Nickel-plated copper alloy.
Terminals: Brass, electro-tinned. Solder lug design,
cable clamp part of sleeve terminal.
Insulation: Rigid plastic.
LOCK-EXTENSION JAX ?
Housing (or Sleeve) and Handle:
Nickel-plated copper alloy.
TERMINALS:
Sleeve: Plated steel. Tip and Ring:
integral part of tip and ring springs.
Springs: Spring tempered copper alloy.
Insulation: Molded thermoplastic insert.
Rigid plastic terminal washer.
LOCK-PLUG
Typical
Part
Mating
Handle
Number
282
Cond.
2
Terminals
Solder
Jack
12A
Part Number
Notes
Lug &
T10581
Similar to Switchcraft Number 297 Littel-Plug
298
3
Cable
12B, 133
A10071
except with coupling ring.
Clamp
LOCK-EXTENSION JAX ?
Typical
Part
Mating
Handle
Number
Cond.
Terminals
Plug
Part Number
Notes
Solder
Lug &
Sleeve terminal has cable clamp. Similar to
Switchcraft Number 131 Extension-Jax ? .
133
3
Cable
298
T1485
?
Clamp
133
DIMENSIONS ARE FOR REFERENCE ONLY
Inch
(mm)
282
SWITCHCRAFT, INC. 5555 N. Elston Ave. ? Chicago, IL 60630
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