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DOUBLE ARMING BOLTS

Double Arming Bolts are fully threaded and assembled with four square nuts. They are used in double crossarm construction to secure and lock in the spacing between the crossarms. Typically used to pass through poles.

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DOUBLE ARMING BOLT SPECIFICATIONS

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Nuts per ASME B18.2.1
All Items Hot Dipped Galvanized

5/8" SPECIFICATIONS

Bolt Length (Inches) A
Width Across Flat (Inches) B
Weight/100 (lbs)
Width Nuts (Inches) C
10
1"
118
31/64
12
" "
136
" "
14
" "
142
" "
16
" "
158
" "
18
" "
187
" "
20
" "
192
" "
22
" "
208
" "
24
" "
224
" "
26
" "
240
" "
28
" "
256
" "
30
" "
264
" "
32
" "
284
" "
34
" "
295
" "
36
" "
332
" "

3/4" SPECIFICATIONS

Bolt Length (Inches) A
Width Across Flats (Inches) B
Weight/100 (lbs)
Nut Width (Inches) C
12
1-1/8"
196
1"
10
" "
167
" "
14
" "
220
" "
16
" "
240
" "
18
" "
260
" "
20
" "
284
" "
22
" "
304
" "
24
" "
336
" "
26
" "
345
" "
28
" "
365
" "
30
" "
386
" "
32
" "
400
" "
34
" "
420
" "
36
" "
460
" "

7/8" SPECIFICATIONS

Bolt Length (Inches) A
Width Across Flats (Inches) B
Weight/100 (lbs)
Width Nuts (Inches) C
20
1-5/16"
391
49/64
22
" "
421
" "
24
" "
451
" "
26
" "
480
" "
28
" "
510
" "
30
" "
540
" "
32
" "
569
" "
34
" "
599
" "
36
" "
629
" "

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© 2026 Centennial Bolt, Inc.

CONTACT

Phone: 800.321.9996

Fax: 303.371.0805

Email: sales@centennialbolt.com

BUSINESS HOURS

Mon - Fri: 7:30am - 4:30pm MST

​​Saturday & Sunday: Closed

RECEIVING HOURS

Mon - Fri: 9:30am - 4:00pm MST

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