Abstract: A security seal includes a locking element and a locking body configured to receive an end of the locking element therein to secure the security seal at an object. The locking body may include a deformable wall that deforms responsive to a sufficient pressure applied to the wall of the locking body. A disk element may be disposed in the locking body and movable along a tapered channel to clamp against the locking element to limit retraction of the locking element. The tapered channel may have an arcuate surface along which the disk element moves to provide a progressively increasing bite angle and clamping force at the locking element. The disk element may have a knurled surface with a circumferential groove established circumferentially around the disk element, with the circumferential groove offset from a center line of the disk element and toward a respective end of the disk element.