Ph: 800.466.1940Fax: 877.565.6686
Hi-Tech Fasteners Inc.
PEM® PEMFLEX® self-locking, self-clinching fasteners retain their repeated use and effective prevailing locking torque.
  • Shoulder provides increased performance.
  • Flexing action permits repeated use and effective locking torque.
  • Flange provides positive stop during installation.
The thread locking performance of Types LK, LKA, and LKS PEMHEX self-clinching fasteners (with MD finish) is equivalent to applicable NASM25027 specifications. The self-clinching feature is the same tried and proven design preferred and appreciated for fast, simple assembly. These fasteners do not protrude through the reverse side of the sheet and provide positive, permanent attachment with high torque-out (many times greater than locking torque) and pushout resistances.

PEM all-metal, self-locking fasteners are available in steel, stainless steel, and aluminum. Types LK (steel) and LKS (stainless) are treated with a black dry film lubricant for better locking performance. Type LKA (aluminum) must be used with a lubricated screw. The PEM design utilizes two rugged, semicircular flexing jaws instead of several less-supported segments. The greater ruggedness and retention of this PEMFLEX action prevents relaxation and loosening of the fastener in severe service.

This PEMFLEX design also protects the screw threads. Clearances obtained by only two interruptions of a full circumference, together with the spreading of the jaws by the entering screw, minimize the possibility of thread damage.
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Part #

Thread Size

A (Shank) Max.

Hole Size in Sheet + .003 - .000

C Max.

E Nom.

Fastener Material

Standard Finish

Inventory

Add To Cart/Request Quote
LK-256-1MD N/A .086-56 (#2-56) N/A .038 in N/A .172 in N/A .171 in N/A .250 in N/A Carbon Steel N/A Black, Dry-film Lubricant over Zinc Phosphate N/A {0} Request Quote
LK-256-2MD N/A .086-56 (#2-56) N/A .054 in N/A .172 in N/A .171 in N/A .250 in N/A Carbon Steel N/A Black, Dry-film Lubricant over Zinc Phosphate N/A {0} Request Quote
LK-440-1MD N/A .112-40 (#4-40) N/A .038 in N/A .187 in N/A .186 in N/A .250 in N/A Carbon Steel N/A Black, Dry-film Lubricant over Zinc Phosphate N/A {0} Request Quote
LK-440-2MD N/A .112-40 (#4-40) N/A .054 in N/A .187 in N/A .186 in N/A .250 in N/A Carbon Steel N/A Black, Dry-film Lubricant over Zinc Phosphate N/A {0} Request Quote
LK-632-1MD N/A .138-32 (#6-32) N/A .038 in N/A .219 in N/A .218 in N/A .312 in N/A Carbon Steel N/A Black, Dry-film Lubricant over Zinc Phosphate N/A {0} Request Quote
LK-632-2MD N/A .138-32 (#6-32) N/A .054 in N/A .219 in N/A .218 in N/A .312 in N/A Carbon Steel N/A Black, Dry-film Lubricant over Zinc Phosphate N/A {0} Request Quote
LK-832-1MD N/A .164-32 (#8-32) N/A .038 in N/A .266 in N/A .265 in N/A .343 in N/A Carbon Steel N/A Black, Dry-film Lubricant over Zinc Phosphate N/A {0} Request Quote
LK-832-2MD N/A .164-32 (#8-32) N/A .054 in N/A .266 in N/A .265 in N/A .343 in N/A Carbon Steel N/A Black, Dry-film Lubricant over Zinc Phosphate N/A {0} Request Quote
LK-032-1MD N/A .190-32 (#10-32) N/A .038 in N/A .312 in N/A .311 in N/A .375 in N/A Carbon Steel N/A Black, Dry-film Lubricant over Zinc Phosphate N/A {0} Request Quote
LK-032-2MD N/A .190-32 (#10-32) N/A .054 in N/A .312 in N/A .311 in N/A .375 in N/A Carbon Steel N/A Black, Dry-film Lubricant over Zinc Phosphate N/A {0} Request Quote
LKS-256-1MD N/A .086-56 (#2-56) N/A .038 in N/A .172 in N/A .171 in N/A .250 in N/A 300 Series Stainless Steel N/A Black, Dry-film Lubricant N/A {0} Request Quote
LKS-256-2MD N/A .086-56 (#2-56) N/A .054 in N/A .172 in N/A .171 in N/A .250 in N/A 300 Series Stainless Steel N/A Black, Dry-film Lubricant N/A {0} Request Quote
LKS-440-1MD N/A .112-40 (#4-40) N/A .038 in N/A .187 in N/A .186 in N/A .250 in N/A 300 Series Stainless Steel N/A Black, Dry-film Lubricant N/A {0} Request Quote
LKS-440-2MD N/A .112-40 (#4-40) N/A .054 in N/A .187 in N/A .186 in N/A .250 in N/A 300 Series Stainless Steel N/A Black, Dry-film Lubricant N/A {0} Request Quote
LKS-632-1MD N/A .138-32 (#6-32) N/A .038 in N/A .219 in N/A .218 in N/A .312 in N/A 300 Series Stainless Steel N/A Black, Dry-film Lubricant N/A {0} Request Quote
LKS-632-2MD N/A .138-32 (#6-32) N/A .054 in N/A .219 in N/A .218 in N/A .312 in N/A 300 Series Stainless Steel N/A Black, Dry-film Lubricant N/A {0} Request Quote
LKS-832-1MD N/A .164-32 (#8-32) N/A .038 in N/A .266 in N/A .265 in N/A .343 in N/A 300 Series Stainless Steel N/A Black, Dry-film Lubricant N/A {0} Request Quote
LKS-832-2MD N/A .164-32 (#8-32) N/A .054 in N/A .266 in N/A .265 in N/A .343 in N/A 300 Series Stainless Steel N/A Black, Dry-film Lubricant N/A {0} Request Quote
LKS-032-1MD N/A .190-32 (#10-32) N/A .038 in N/A .312 in N/A .311 in N/A .375 in N/A 300 Series Stainless Steel N/A Black, Dry-film Lubricant N/A {0} Request Quote
LKS-032-2MD N/A .190-32 (#10-32) N/A .054 in N/A .312 in N/A .311 in N/A .375 in N/A 300 Series Stainless Steel N/A Black, Dry-film Lubricant N/A {0} Request Quote
LKA-256-1 N/A .086-56 (#2-56) N/A .038 in N/A .172 in N/A .171 in N/A .250 in N/A 7075-T6 Aluminum N/A Plain N/A {0} Request Quote
LKA-256-2 N/A .086-56 (#2-56) N/A .054 in N/A .172 in N/A .171 in N/A .250 in N/A 7075-T6 Aluminum N/A Plain N/A {0} Request Quote
LKA-440-1 N/A .112-40 (#4-40) N/A .038 in N/A .187 in N/A .186 in N/A .250 in N/A 7075-T6 Aluminum N/A Plain N/A {0} Request Quote
LKA-440-2 N/A .112-40 (#4-40) N/A .054 in N/A .187 in N/A .186 in N/A .250 in N/A 7075-T6 Aluminum N/A Plain N/A {0} Request Quote
LKA-632-1 N/A .138-32 (#6-32) N/A .038 in N/A .219 in N/A .218 in N/A .312 in N/A 7075-T6 Aluminum N/A Plain N/A {0} Request Quote
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