ATF is now an authorized FLEXLOC master stocking distributorRead FLEXLOC® Master Letter

The Flexloc product line is an engineered product. Unlike commodity locknuts, the Flexloc product performs at a level well beyond what can be achieved by less expensive locknuts. Designed and manufactured by SPS Technologies, Flexloc became the premier industrial locknut due to its quality and consistency in overall performance.

Flexloc’s all metal construction, means that each thread is load bearing. This results in a more uniform distribution of stress over each thread, achieving optimum vibration resistance. This one piece construction also provides superior locking capability, without the need for additional lockwashers or lockwires, thereby eliminating a potential source of FOD.

Flexloc is available in a wide range of sizes, configurations and finishes, as a standard off the shelf product. There is only one Flexloc Locknut. It is produced by SPS Technologies, in Jenkintown, PA. Make sure the product you are purchasing and receiving is certified as such. ATF Aerospace, appointed as the Master Distributor of Flexloc by SPS Technologies, a division of PCC, guarantees this and will furnish certifications free of charge upon request.

For pricing or engineering assistance, please email us via our Contact Page.


Philadelphia Office
1045 D Industrial Blvd, Southampton PA 18966
+1.215.364.1701 (phone)
+1.215.364.1107 (fax)