NEMA PH 31-1977
GALVANIZED FERROUS SINGLE AND DOUBLE UPSET SPOOL INSULATOR BOLTS

Standard No.

NEMA PH 31-1977

Release Date

1977

Published By

NEMA - National Electrical Manufacturers Association

Latest

NEMA PH 31-1977

NEMA PH 31-1977 history

• 1977 NEMA PH 31-1977 GALVANIZED FERROUS SINGLE AND DOUBLE UPSET SPOOL INSULATOR BOLTS