Paṭāṇi at Vin IV 46 (paṭāṇi dinnā hoti) is not clear, it is explained by Buddhaghosa as "mañcapidhānaṃ (for °pīṭhānaṃ) pādasikhāsu āṇi dinno hoti." At Sv I 77 we find the following... "visūkaṃ paṭānibhūtaṃ dassanan ti visūkadassanaṃ", and at As 393: "paṭāni-gahaṇaṃ gahetvā ekapaden'eva taṃ nissaddaṃ akāsiṃ."
(nt, nt) bolt; screw; fastener