Spool Bolt

Spool Bolt carries a spool insulator for secondary or service conductors on a wood pole. A forged shoulder, single or double, holds the insulator clear of the pole face, and a cotter pin keeps it on the bolt. Specify shoulder type, shank length and the quantity you need.

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At a glance

Spool Bolt at a glance.

Function

Carries a spool insulator

The spool insulator sits on the bolt shank, and the low-voltage conductor is tied to the spool.

Shoulder

Single or double shoulder

The forged shoulder sets where the insulator sits on the shank and stops it riding back against the pole; buyers name the single or double pattern their utility uses.

Product form

5/8 in with 8 to 14 in shank

5/8 in (M16), 8–14 in (200–350 mm) shank with 4–6 1/2 in (100–160 mm) of thread, to ANSI C135.31, galvanized to ASTM A153, with square nuts, lock washers, a round washer and a cotter pin.

How it works

Through the pole, spool on the shank

The threaded end goes through the pole or a crossarm and is fixed with washers and nuts on the far side. The spool insulator is slid onto the shank against the shoulder, and a washer and cotter pin at the end keep it in place.

Common applications

Where it is used.

Application

Secondary conductors

Low-voltage secondary conductors run on spool insulators below the primary crossarms. A spool bolt carries each spool where a full rack is not needed.

Application

Service drops

Service drops to houses and small buildings leave the pole from a spool. The bolt fixes that spool to the pole or to a crossarm.

Application

Neutral and street lighting circuits

Neutral conductors and street lighting circuits also run on spool insulators. The same bolt serves each of them.

What does the shoulder on a spool bolt do?

The forged shoulder, single or double, sets where the spool insulator sits on the bolt and holds it clear of the pole face or the arm. A washer and cotter pin at the end keep the spool on. GV supplies 5/8 in (M16) spool bolts with 8 to 14 in (200 to 350 mm) shanks.

What comes with a spool bolt?

Each spool bolt is supplied as a set: the bolt, 4 square nuts, 2 lock washers, 1 round washer and a cotter pin, hot dip galvanized to ASTM A153. Specify the shoulder type and shank length your utility standard calls for, to ANSI C135.31 or your own drawing.

Pole-Line Assemblies