Starrett PT13100 Nut ONLY for 123-12" & 24" Vernier Caliper Series 

.125-40 

*will also work with 123EMZ-12" & 24"

*will also work with 123M-300 & 600

Pic of envelope & tool are for reference only - will not come with part

PLEASE NOTE: WE ARE CLOSED ON SATURDAYS & SUNDAYS AND THEREFORE MAY NOT ALWAYS RESPOND TO OFFERS.