257 THOMAS & BETTS, 257 Datasheet - Page 4

• Manufacturer Part Number: 257
• Description: Electrical
• Manufacturer: THOMAS & BETTS

Specifications of 257

• Leaded Process Compatible: No
• Peak Reflow Compatible (260 C): No
• Outer Diameter: 47.625mm
• Length: 43.663mm
• Body Material: Malleable Iron
• External Diameter: 47.625mm
• Accessory Type: Squeeze Connector
• Rohs Compliant: No
• For Use With: Armored Cable And Flexible Metal Conduit
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

A-152
•
•
•
Designed to resist vibration and strain!
TITE-BITE
•
•
•
Completely salvageable!
TITE-BITE
Connectors
Easy to install with double-grip saddle
3
which produces uniform high quality
and a smooth throat to protect
conductor insulation
3
Steel or malleable iron construction
Tough, insulated lining and Tite-Bite
design make these connectors a
“must” when conductors are subject
to vibration or strain
Look for the unique T&B blue color
to ensure the highest quality fitting
⁄
⁄
8
4
" and
" and larger size are malleable iron
www.tnb.com
1
⁄
2
Metal Clad Cable, Armored Cable and Flexible Metal
Conduit Fittings
" sizes made of formed steel,
®
®
Connectors — Nylon-Insulated
®
United States
Tel: [phone]
Fax: [phone]
800.816.7809
CAT. NO.
3110-TB**
3112
3115
3117
3118***
3119***
3120***
3121***
3122***
3123***††
3124***
** UL Listed for armored cable only.
*** UL Listed for flexible metal conduit only.
Material: Steel thru
† Approximate dimension with screw at minimum height.
UL File No. E 23018
CSA File No. 2884
†† CSA not applicable.
# Approved for Metal Clad Cable
CAT.
NO.
300-TB**#
302-TB#
304#
306#
308***
310***
312***
314***
316***
** UL Listed for armored cable only.
*** UL Listed for flexible metal conduit only.
† Approximate dimension with screw at minimum height.
UL File No. E 23018
CSA File No. 2884
Material: Steel thru
# Approved for Metal Clad Cable
#
#
#
#
1.125
1.468
1.750
2.031
2.500
3.062
3.562
4.060
4.560
1.093
1.468
1.750
2.031
2.500
3.062
3.562
MAX.
MAX.
.660
.937
.660
.937
3
1
⁄
⁄
4
2
" trade size.
" trade size.
CABLE OPENING
CABLE OPENING
Canada
Tel: [phone]
Fax: [phone]
1.250
1.562
1.812
2.312
2.812
3.312
3.620
4.120
1.250
1.562
1.812
2.312
2.812
3.312
MIN.
.470
.750
.906
MIN.
.470
.750
.906
TRADE
TRADE
SIZE
SIZE
1
1
2
3
1
2
1
3
1
3
3
1
3
1"
2"
3"
4"
1"
2"
3"
⁄
⁄
⁄
1
1
1
1
⁄
⁄
⁄
1
1
8
2
4
8
2
4
1
⁄
⁄
⁄
⁄
⁄
⁄
⁄
Technical Services
Tel: [phone]
"
"
"
4
2
2
2
"
"
"
2
2
4 "
"
"
"
"
"
"
SIZE
SIZE
K.O.
1
1
2
3
K.O.
1
1
2
1
1
3
1"
2"
3"
4"
1
1
3
1"
2"
3"
⁄
⁄
⁄
⁄
⁄
⁄
2
2
4
1
1
1
1
2
2
4
1
1
1
⁄
⁄
⁄
⁄
⁄
⁄
⁄
"
"
"
4
2
2
2
"
"
"
4
2
2
"
"
"
"
"
"
"
1
1
2
2
4
A†
1
1
2
2
3
3
4
—
—
A†
1
1
2
3
3
25
5
1
1
5
1
1
1
3
3
1
3
3
5
7
5
1
1
⁄
⁄
⁄
⁄
4
1 6
1 6
1 6
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
4
4
3 2
8
4
8
4
8
8
8
8
8
2
"
DIMENSIONS (IN.)
DIMENSIONS (IN.)
1
1
2
1
2
2
3
1
1
1
1
2
2
3
3
—
—
1
3
B
B
11
11
13
2
5
1
9
3
1
1
3
3
5
3
1
1
3
1
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
1 6
⁄
⁄
⁄
3 2
1 6
⁄
⁄
1 6
8
8
4
4
8
4
4
4
1 6
1 6
4
1 6
8
®
®
1
1
1
1
1
1
2
2
1
1
1
2
2
—
—
1
1
7
C
g
g
13
C
13
7
⁄
7
7
1 6
1
1
1
⁄
1
1
3
1
1
⁄
⁄
3
3
⁄
⁄
⁄
3 2
⁄
⁄
⁄
⁄
⁄
⁄
6 4
3 2
⁄
4 "
⁄
⁄
4 "
4 "
8
4
4
1 6
4
4
4
4
1 6
®
®