MacLean-ESNA has been the standard against which all other Nylon Insert lock nuts are judged. MacLean-ESNA is the developer of vibration-proof, self-locking fasteners that employ various elastomeric inserts and provide numerous solutions for seemingly impossible fastener problems.

MacLean-ESNA products can be found in aerospace, electronics, aviation and all facets of manufacturing. Whether standard or special, MacLean-ESNA's approved product line of lock nuts can save you time and money, when Mil-Specs and other Specifications are to be met.

MacLean-ESNA's nylon-equipped lock nuts have demonstrated superior resistance to loosening over all other types of self-locking nuts and locking devices. Nylon compounds, employed by MacLean-ESNA in the locking elements of their nuts, are  one of the most resistant of the thermoplastic resins. It will not soften gradually as the temperature rises, but has a sharp melting point below which it remains fairly rigid.