BURNDY®
Accessories & Hardware
TABLE OF CONTENTS
DURIUM™ Hardware
Bolts
Nuts
Flat Washers
Split Lockwashers
Internal Tooth Lockwashers
D-2
D-3
D-3
D-3
D-3
Aluminum Hardware
Bolts
Nuts
Flat Washers
Split Lockwashers
D-4
D-4
D-4
D-4
Galvanized Steel Hardware
Bolts
Nuts
Flatwashers
Internal Tooth Lockwashers
D-5
D-5
D-5
D-5
Stainless Steel Hardware
Bolts
Nuts
Split Lockwashers
Flat Washers
Belleville Washers
D-6
D-6
D-6
D-6
D-7
D-1
TMH Terminal Mounting Hardware Kits
D-8
DURIUM™ Silicon Bronze
D-8
Stainless Steel
D-9
DURIUM™ U-Bolts
Blue highlighted items are industry standard and most frequently ordered.
Canada: 1-800-387-6487
www.burndy.com
US: 1-800-346-4175
Accessories & Hardware
HARDWARE DATA
RECOMMENDED
TIGHTENING TORQUE
D-2
The hardware used in connectors must be
compatible with the connector material, have high
mechanical strength and be corrosion resistant
and correspond to NEMA recommendations.
Copper alloy connectors have hardware made
of DURIUM™, which is BURNDY’s trade name
for silicon bronze alloy ASTMB99 type B. This
material was first introduced by BURNDY® in 1927
for use in outdoor construction, and today, is the
standard throughout the industry.
BURNDY®
DURIUM™ and Steel Hardware
Bolt Size
Rec. Torque (Inch Pounds)
1/4 - 20
80
5/16 - 18
180
3/8 - 16
240
1/2 - 13
480
5/8 - 11
660
3/4 - 10
1,050
Bolt Size
1/2 - 13
5/8 - 11
3/4 - 10
Aluminum Hardware
Rec. Torque (Inch Pounds)
300
480
650
Aluminum connectors generally have aluminum
alloy hardware. The bolts are 2024T4 and
anodized to resist corrosion. The nuts are 6061T6,
which is resistant to corrosion and does not require
anodizing. Both nuts and bolts are lubricated
to eliminate galling and to provide consistent
clamping forces.
dimension and the threads are per American
National Coarse Series, Class #2 fit. The silicon
bronze is per ASTM B99.
To reduce or greatly exceed the recommended
torque can adversely affect the performance of the
connector.
DURIUM™ BOLT
SILICON BRONZE
BURNDY® introduced silicon-bronze bolts, nuts
and other hardware items on outdoor connector
applications in 1927. Today the DURIUM™
trademark is a standard for this use. DURIUM™
bolts combine high strength with corrosion
resistance. Heads have American Standard
Catalog Number
25x50HEBBOX
25x62HEBBOX
25x75HEBBOX
25x100HEBBOX
25x125HEBBOX
25x150HEBBOX
25x200HEBBOX
25x250HEBBOX
25x300HEBBOX
31x50HEBBOX
31x62HEBBOX
31x75HEBBOX
31x100HEBBOX
31x125HEBBOX
31x150HEBBOX
31x175HEBBOX
31x200HEBBOX
31x250HEBBOX
31x300HEBBOX
38x50HEBBOX
38x62HEBBOX
38x75HEBBOX
38x88HEBBOX
38x100HEBBOX
Thread
Size
1/4-20
1/4-20
1/4-20
1/4-20
1/4-20
1/4-20
1/4-20
1/4-20
1/4-20
5/16-18
5/16-18
5/16-18
5/16-18
5/16-18
5/16-18
5/16-18
5/16-18
5/16-18
5/16-18
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
B Length
(Inches)
1/2
5/8
3/4
1
1-1/4
1-1/2
2
2-1/2
3
1/2
5/8
3/4
1
1-1/4
1-1/2
1-3/4
2
2-1/2
3
1/2
5/8
3/4
7/8
1
Catalog Number
38x125HEBBOX
38x150HEBBOX
38x175HEBBOX
38x200HEBBOX
38x225HEBBOX
38x250HEBBOX
38x275HEBBOX
38x300HEBBOX
38x325HEBBOX
38x350HEBBOX
38x400HEBBOX
38x450HEBBOX
38x500HEBBOX
44x150HEBBOX
44x200HEBBOX
50x75HEBBOX
50x100HEBBOX
50x125HEBBOX
50x150HEBBOX
50x175HEBBOX
50x200HEBBOX
50x225HEBBOX
50x250HEBBOX
50x275HEBBOX
Thread
Size
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
7/16-14
7/16-14
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
B Length
(Inches)
1-1/4
1-1/2
1-3/4
2
2-1/4
2-1/2
2-3/4
3
3-1/4
3-1/2
4
4-1/2
5
1-1/2
2
3/4
1
1-1/4
1-1/2
1-3/4
2
2-1/4
2-1/2
2-3/4
Catalog Number
50x300HEBBOX
50x325HEBBOX
50x350HEBBOX
50x375HEBBOX
50x400HEBBOX
50x450HEBBOX
50x500HEBBOX
50x550HEBBOX
50x600HEBBOX
62x100HEBBOX
62x125HEBBOX
62x150HEBBOX
62x175HEBBOX
62x200HEBBOX
62x225HEBBOX
62x250HEBBOX
62x275HEBBOX
62x300HEBBOX
62x325HEBBOX
62x350HEBBOX
62x400HEBBOX
62x450HEBBOX
62x500HEBBOX
62x600HEBBOX
Thread
Size
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
B Length
(Inches)
3
3-1/4
3-1/2
3-3/4
4
4-1/2
5
4-1/2
6
1
1-1/4
1-1/2
1-3/4
2
2-1/4
2-1/2
2-3/4
3
3-1/4
3-1/2
4
4-1/2
5
6
Blue highlighted items are industry standard and most frequently ordered.
US: 1-800-346-4175
www.burndy.com
Canada: 1-800-387-6487
BURNDY®
Accessories & Hardware
DURIUM™ NUTS
Catalog Number
SILICON BRONZE
DURIUM™ hexagon regular nuts are nonmagnetic and are made to American Standard
dimensions. American National Coarse Series
threads. #2 fit.
Thread Size
25CHENBOX
1/4-20
31CHENBOX
5/16-18
38CHENBOX
3/8-16
44CHENBOX
7/16-14
50CHENBOX
1/2-13
62CHENBOX
5/8-11
DURIUM™ FLAT WASHERS
SILICON BRONZE
High strength DURIUM™ Flat Washers are nonmagnetic and free from galvanic action when in
contact with copper. Conforms to SAE standards.
Catalog Number
For Bolt Size
25FWBOX
31FWBOX
38FWBOX
44FWBOX
50FWBOX
62FWBOX
1/4
5/16
3/8
7/16
1/2
5/8
Nominal Dimensions in Inches
A
B
1/16
5/8
1/16
11/16
1/16
13/16
1/16
15/16
3/32
1-1/16
3/32
1-5/16
DURIUM™ SPLIT
LOCKWASHERS
SILICON BRONZE
DURIUM™ spring type lockwasher has high
resiliency and exerts constant pressure on the
face of the nut, preventing vibration from loosening
the nut.
DURIUM™ INTERNAL TOOTH
LOCKWASHERS
SILICON BRONZE
DURIUM™ Internal Tooth Lockwashers are
available as illustrated. The teeth are twisted
slightly and present biting edges which grip the
nut and the part being clamped, preventing the nut
from backing off.
Catalog Number
For Bolt Size
25SWBOX
1/4
31SWBOX
5/16
38SWBOX
3/8
44SWBOX
7/16
50SWBOX
1/2
62SWBOX
5/8
Catalog Number
For Bolt Size
25NWBOX
1/4
31NWBOX
5/16
38NWBOX
3/8
44NWBOX
7/16
50NWBOX
1/2
62NWBOX
5/8
Blue highlighted items are industry standard and most frequently ordered.
Canada: 1-800-387-6487
www.burndy.com
US: 1-800-346-4175
D-3
Accessories & Hardware
BURNDY®
ALUMINUM HARDWARE
BOLTS
D-4
BURNDY® aluminum hexagon head bolts are
manufactured of alloy 2024-T4 and are finished
with anodic coating and lubricated. Threads are
coarse series, class 2A fit.
Catalog
Number
Thread
Size
50x150HABBOX
50x175HABBOX
50x200HABBOX
50x225HABBOX
50x250HABBOX
50x275HABBOX
50x300HABBOX
50x325HABBOX
50x350HABBOX
50x375HABBOX
50x400HABBOX
50x425HABBOX
50x450HABBOX
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
B
Length
(Inches)
1-1/2
1-3/4
2
2-1/4
2-1/2
2-3/4
3
3-1/4
3-1/2
3-3/4
4
4-1/4
4-1/2
Catalog
Number
Thread
Size
50x500HABBOX
50x550HABBOX
62x175HABBOX
62x200HABBOX
62x225HABBOX
62x250HABBOX
62x300HABBOX
62x350HABBOX
62x400HABBOX
62x450HABBOX
62x500HABBOX
62x550HABBOX
62x600HABBOX
1/2-13
1/2-13
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
B
Length
(Inches)
5
5-1/2
1-3/4
2
2-1/4
2-1/2
3
3-1/2
4
4-1/2
5
5-1/2
6
NUTS
BURNDY® aluminum nuts are manufactured of
alloy 6061-T6, are finished type, coarse thread,
class 2B fit.
Catalog
Number
Thread
Size
50HANBOX
1/2-13
62HANBOX
5/8-11
FLAT WASHERS
BURNDY® aluminum flat washers are
manufactured of alloy 2024-T4 and are medium
design.
Catalog
Number
50FWABOX
62FWABOX
For Bolt
Size
1/2
5/8
Description
Flat Washer
Flat Washer
SPLIT LOCKWASHERS
BURNDY® aluminum split lockwashers are
manufactured of alloy 7075-T6 and are regular
design.
Catalog
Number
Description
For Bolt
Size
50SWALBOX
Split Washer
1/2
62SWALBOX
Split Washer
5/8
Blue highlighted items are industry standard and most frequently ordered.
US: 1-800-346-4175
www.burndy.com
Canada: 1-800-387-6487
BURNDY®
Accessories & Hardware
GALVANIZED
STEEL HARDWARE
Galvanized bolts, nuts, flatwashers, and internal
tooth lockwashers are manufactured per
ASTM307 Grade A. Nut surfaces and bolt heads
have American Standard dimensions, and the
threads are per American National Coarse Series,
Class #2 fit. Galvanizing is per ASTM A153.
D-5
BOLTS
NUTS
Catalog
Number
Thread
Size
Length (B)
38x125HGSB
3/8-16
1.25
38x275HGSB
3/8-16
2.75
38x225HGSB
3/8-16
2.25
50x100HGSB
1/2-13
1.00
50x150HGSB
1/2-13
1.50
50x200HGSB
1/2-13
2.00
62X100HGSB
5/8-11
1.00
62x175HGSB
5/8-11
1.75
75X125HGSB
3/4-11
1.25
Catalog
Number
Thread
Size
31CHGSN
5/16-18
38HGSN009
3/8-16
38HGSN
3/8-16
50HGSN
1/2-13
62HGSN
5/8-11
FLAT WASHERS
Catalog
Number
For Bolt
Size
38x81FWGS
50x106FWGS
Nominal Dimensions (Inches)
I.D.A
O.D.B
3/8
0.41
0.81
1/2
0.53
1.06
INTERNAL TOOTH
LOCKWASHERS
Catalog
Number
Bolt
Size
38NWGS
3/8
50NWGS
1/2
62NWGS
5/8
75NWGS
3/4
Blue highlighted items are industry standard and most frequently ordered.
Canada: 1-800-387-6487
www.burndy.com
US: 1-800-346-4175
Accessories & Hardware
BURNDY®
STAINLESS STEEL
HARDWARE
D-6
Stainless steel bolts, nuts, flatwashers and split
lockwashers are manufactured from 18-8 nonmagnetic material. Nut surfaces and bolt heads
have American National Coarse Series, Class #2
fit.
BOLTS
Catalog
Number
38X125HSSB
38x225HSSB
38x250HSSB
38x275HSSB
50x200HSSB
50x250HSSB
50x300HSSB
62x300HSSB
NUTS
SPLIT LOCKWASHERS
Thread
Size
3/8-16
3/8-16
3/8-16
3/8-16
1/2-13
1/2-13
1/2-13
5/8-11
Length
B
1-1/4
2-1/4
2-1/2
2-3/4
2
2-1/2
3
3
Catalog
Number
Thread
Size
25HSSN
1/4-20
38HSSN
3/8-16
50HSSN
1/2-13
62HSSN
5/8-11
Catalog
Number
For Bolt
Size
25SWSSLT
1/4
38SWSSMD
3/8
50SWSSMD
1/2
62SWSSMD
5/8
FLAT WASHERS
Catalog
Number
For Bolt
Size
25FWSS
38FWSS
50FWSS
62FWSS
1/4
3/8
1/2
5/8
Nominal Dimensions (Inches)
I.D.A
O.D.B
0.27
0.69
0.41
1.00
0.59
1.13
0.66
1.31
Blue highlighted items are industry standard and most frequently ordered.
US: 1-800-346-4175
www.burndy.com
Canada: 1-800-387-6487
BURNDY®
Accessories & Hardware
STAINLESS STEEL
HARDWARE
BELLEVILLE WASHERS
Any bolted “pad to flat” electrical connection should
include a bolt, two flatwashers, and the nut. In
addition, if any of the flat components is aluminum,
a properly designed Belleville washer should be
interposed between one of the flatwashers and
either the bolt head or the nut, with the hollow of the
Belleville washer placed against the flat washer. BURNDY® Belleville washers are designed to
maintain substantial force when tightened to
NEMA-recommended values and finely finished
to avoid galling.
D-7
Catalog
Number
Material
Bolt
Size
38x75BWSS
Steel - Stainless
50x106BWSS
Steel - Stainless
Nominal Dimensions
Thickness
I.D.
O.D.
3/8
0.06
0.39
0.75
1/2
0.10
0.53
1.06
Blue highlighted items are industry standard and most frequently ordered.
Canada: 1-800-387-6487
www.burndy.com
US: 1-800-346-4175
Accessories & Hardware
BURNDY®
TYPE TMH
DURIUM™ SILICON BRONZE
HARDWARE KITS
D-8
Type TMH are DURIUM™ silicon bronze
hardware kits. The kits can be ordered for specific
applications ensuring the proper type and amount
of hardware for each installation. Packaged in
separate sealed bags, they are convenient to use,
eliminating mismatched quantities. DURIUM™
silicon bronze material provides long lasting
corrosion resistance Grade 2.
Catalog
Number
TMH262
TMH263
TMH264
TMH265
TMH266
TMH267
TMH268
TMH269
TMH270
TMH271
TMH332 2
TMH261 †
TMH289 ††
TMH295
TMH272
TMH294
TMH69
Size
1/4-20
3/8-16
1/2-13
Bolt
Length
0.75
1.00
1.25
1.50
0.75
1.00
1.25
1.50
1.75
2.00
2.75
3.00
1.25
1.25
1.50
1.75
2.00
Each TMH Kit Includes:
Qty
2
2
2
2
2
2
2
2
2
2
2
2
1
2
2
2
2
Flat
Split
Washer Washer
4
2
4
2
4
2
4
2
4
2
4
2
4
2
4
2
4
2
4
2
4
2
4
2
2
1
4
2
4
2
4
2
4
2
† For use with CUSA750-2TC38 copper spacer adaptor, (2) terminals and °” thick equipment bus bar. For other
combinations contact BURNDY®.
†† For use with all GAR-TC connectors. “R” dimension is
allowable pad thickness of terminal
TYPE TMH-SS
STAINLESS STEEL
HARDWARE KITS
Type TMH-SS are stainless steel hardware kits. Just like the standard TMH kits, these kits can
be ordered for specific applications ensuring the
proper type and amount of hardware for each
installation. They are packaged in separate sealed
bags and convenient for use and ordering.
Catalog
Number
TMH322SS
TMH262SS
TMH263SS
TMH264SS
TMH265SS
TMH267SS
TMH268SS
TMH269SS
TMH270SS
TMH271SS
TMH261SS †
TMH295SS
TMH272SS
TMH294SS
TMH69SS
Hex
Nut
2
2
2
2
2
2
2
2
2
2
2
2
1
2
2
2
2
10-32
1/4-20
3/8-16
1/2-13
Bolt
Length Qty
0.88
1
0.75
2
1.00
2
1.25
2
1.50
2
1.00
2
1.25
2
1.50
2
1.75
2
2.00
2
3.00
2
1.25
2
1.50
2
1.75
2
2.00
2
Flat
Split
Washer Washer
0
4
4
4
4
4
4
4
4
4
4
4
4
4
4
Installation
Torque
(In-lbs)
80
240
480
* For other combinations contact BURNDY®.
1
“L”
dimension never exceeds 0.25"
2
For
use with CUSA442TC38 on 1/4" bus bar and
HYLUG™ 4/0 - 750 kcmil.
Each TMH Kit Includes:
Size
Working
Range (R)
0.09 - 0.34
0.34 - 0.59
0.59 - 0.84
0.84 - 1.09
0.00 - 0.19
0.19 - 0.44
0.44 - 0.69
0.69 - 0.94
0.94 - 1.19
1.19 - 1.44
2.15 - 2.40
0.02 - 0.27
0.27 - 0.49
0.49 - 0.74
0.74 - 0.99
0.99 - 1.24
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
Hex
Nut
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
Working
Range (R)
0.09 - 0.34
0.34 - 0.59
0.59 - 0.84
0.84 - 1.09
0.19 - 0.44
0.44 - 0.69
0.69 - 0.94
0.94 - 1.19
1.19 - 1.44
2.15 - 2.40
0.27 - 0.49
0.49 - 0.74
0.74 - 0.99
0.99 - 1.24
Installation
Torque
(In-lbs)
45
80
—
240
480
Blue highlighted items are industry standard and most frequently ordered.
US: 1-800-346-4175
www.burndy.com
Canada: 1-800-387-6487
BURNDY®
Accessories & Hardware
TYPE UB
DURIUM™
SILICON BRONZE U-BOLTS
DURIUM™ U-BOLTS are specifically designed
for electrical connections to pipe and rod. The
U-BOLTS are threaded on the straight portion of
the legs only allowing for more contact surface on
the pipe or rod. American National Coarse Threads
Class #2 fit. The silicon bronze is per ASTM B99.
Catalog
Number
UB101
UB104
UB105
UB106
UB107
UB336
UB178
UB354
UB187
UB271
UB222
UB242
UB383
UB269
UB357
UB384
UB249
UB1031
UB244
UB199
UB204
UB124
UB268
UB257
UB1032
UB310
UB266
UB267
UB258
UB264
UB1033
UB261
UB422
UB1027
UB1028
UB1029
Thread
Size
1/4-20
1/4-20
1/4-20
1/4-20
1/4-20
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
3/8-16
D-9
H
C
D
B
1.38
1.81
2.03
2.31
2.66
1.50
2.00
2.44
2.47
2.50
2.69
2.72
2.75
2.78
2.78
2.91
3.00
3.31
3.31
3.41
3.47
3.50
3.97
4.16
4.41
4.41
4.97
5.53
5.56
6.16
6.16
6.34
7.69
8.12
9.62
11.20
0.75
1.12
1.31
1.62
1.94
0.88
0.88
1.25
1.16
1.00
1.50
1.16
0.94
1.19
1.69
1.44
1.50
1.75
1.75
2.34
2.06
2.75
2.34
2.81
2.81
2.81
3.31
3.94
4.00
4.44
4.44
4.94
6.00
7.12
9.12
11.25
0.75
0.88
1.00
1.12
1.31
0.62
0.75
1.00
1.06
1.19
1.12
1.31
1.47
1.38
1.12
1.38
1.44
1.90
1.62
1.44
1.62
1.31
2.00
1.94
2.56
2.19
2.50
2.75
2.75
3.12
3.50
3.06
3.88
2.88
2.88
2.88
0.88
1.12
1.25
1.38
1.56
0.88
1.38
1.62
1.69
1.81
1.75
1.94
2.09
2.00
1.75
2.00
2.06
2.25
2.25
2.05
2.25
1.94
2.62
2.56
2.81
2.81
3.12
3.38
3.38
3.75
3.75
3.69
4.50
4.38
4.88
5.38
Catalog
Number
UB1030
UB224
UB358
UB291
UB293
UB464
UB540
UB254
UB328
UB400
UB230
UB311
UB302
UB232
UB260
UB390
UB263
UB282
UB236
UB399
UB436
UB262
UB392
UB416
UB300
UB306
UB275
UB437
UB294
UB314
UB425
UB317
UB315
UB318
UB344
UB319
Thread
Size
3/8-16
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
1/2-13
5/8-11
5/8-11
5/8-11
5/8-11
5/8-11
3/4-10
3/4-10
3/4-10
H
C
D
B
12.70
2.44
2.66
2.81
2.81
3.12
3.19
3.41
3.41
4.03
4.34
4.44
4.62
4.97
5.34
5.38
5.78
6.31
6.41
6.66
6.66
6.78
7.06
7.53
7.62
7.88
8.16
8.56
3.50
3.66
3.72
4.97
5.56
4.22
4.72
6.34
13.25
1.12
1.31
1.19
1.75
1.81
1.38
1.31
2.94
1.31
2.94
1.88
2.47
3.44
2.94
2.50
4.56
4.12
5.06
1.31
4.56
5.06
1.62
5.06
6.12
6.12
7.19
6.12
1.38
2.09
2.31
1.81
2.09
2.44
1.94
2.44
2.88
0.88
1.00
1.19
1.75
1.81
1.38
1.31
2.94
1.31
2.94
1.88
2.47
3.44
2.94
2.50
4.56
4.12
5.06
1.31
4.56
5.06
1.62
5.06
6.12
6.12
3.54
6.12
1.38
2.09
2.31
1.81
2.09
2.44
1.94
2.44
5.88
1.62
1.75
1.97
1.69
1.96
2.25
2.50
1.69
3.12
2.62
3.25
3.12
3.00
3.62
3.88
3.25
4.00
3.62
5.75
4.12
4.00
6.00
4.75
4.31
4.56
4.31
5.25
2.50
2.31
2.25
3.75
4.19
2.62
3.38
4.75
Blue highlighted items are industry standard and most frequently ordered.
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www.burndy.com
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