Locking and Non-locking Threads

• Provide load-bearing threads in thin sheets.
• Permit a total of .030"/0.76 mm adjustment for mating hole misalignment.
• Sheet remains flush on one side, and the fastener is permanently locked in place.
• Threads of the floating nut extend into the retainer shank for extra strength and support in assembly.

AC™/AS™/LAC™/LAS™ Floating Nuts

• Designed for clinching into steel or aluminum panels and sheets.
• Available with (LAC/LAS) or without (AC/AS) locking threads.

A4™/LA4™ Floating Nuts

• Provide prevailing torque locking threads with performance equivalent to applicable NASM25027 specifications⁽¹⁾.
• Designed for clinching into stainless steel panels and sheets.
• Available with (LA4) or without (A4) locking threads.

(1) To meet national aerospace standards and to obtain testing documentation, product must be ordered to US NASM45938/11 specifications. Check our web site for a complete Military Specification and National Aerospace Standards Reference Guide (Bulletin NASM). Screws for use with PEM self-clinching locking fasteners should be Class 3A/4h fit or no smaller than Class 2A/6g.

Drawing callouts: Non-locking AS, AC, A4 nuts / Self-locking LAS, LAC, LA4 nuts — No Protrusion; Threads Extend into Retainer Shank; Positive Stop.