lock staplen. a (typically U-shaped) metal bar over which a hasp can be fitted and secured with a padlock, or into which a bolt is slid; cf. staplen.1 2a.
ΚΠ
1699 A. BoyerRoyal Dict. at Cramponnet de tergette A Lock Staple.
1898 Athenæum 7 May 594/3 The place where the lock-staple had once been fitted.
2004 L. E. ModesittWellspring of Chaos (2005) lxxvi. 364 The hasp fit over the lock staple perfectly.