Antique Coarse Thread Pocket Bolts 16TPI click image for larger view $7.50 each Product #: AC/16TPI/4in Size 4 inch 4.5 inch Add Antique coarse thread pocket bolts. 16 TPI. Available in 4 inch and 4.5 inch sizes - length under head. click image for larger view Antique Coarse Thread Pocket Bolts 16TPI- 4 inch AC/16TPI/4in $7.50 each Add click image for larger view Antique Coarse Thread Pocket Bolts 16TPI- 4.5 inch AC/16TPI/4.5in $7.50 each Add