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PEMFLEX® Self-locking, Self-clinching Fasteners - Types LK, LKA, LKS - Metric
All Metal, Locking Thread Nuts – Types LK, LKA, LKS
PEM® PEMFLEX® self-locking, self-clinching fasteners retain their repeated use and effective prevailing locking torque.
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.
- Shoulder provides increased performance.
- Flexing action permits repeated use and effective locking torque.
- Flange provides positive stop during installation.
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.
Part # |
Thread Size x Pitch |
A (Shank) Max. |
Hole Size in Sheet + 0.08 |
C Max. |
E Nom. |
Fastener Material |
Standard Finish |
CAD |
Inventory |
Add To Cart/Request Quote |
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LKA-M5-2 | Thread Size x Pitch N/A M5 x 0.8 | A (Shank) Max. N/A 1.38 mm | Hole Size in Sheet + 0.08 N/A 7.92 mm | C Max. N/A 7.9 mm | E Nom. N/A 9.53 mm | Fastener Material N/A 7075-T6 Aluminum | Standard Finish N/A Plain |
CAD
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Inventory N/A {0} |
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LKA-M5-1 | Thread Size x Pitch N/A M5 x 0.8 | A (Shank) Max. N/A 0.97 mm | Hole Size in Sheet + 0.08 N/A 7.92 mm | C Max. N/A 7.9 mm | E Nom. N/A 9.53 mm | Fastener Material N/A 7075-T6 Aluminum | Standard Finish N/A Plain |
CAD
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Inventory N/A {0} |
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LKA-M4-2 | Thread Size x Pitch N/A M4 x 0.7 | A (Shank) Max. N/A 1.38 mm | Hole Size in Sheet + 0.08 N/A 6.76 mm | C Max. N/A 6.73 mm | E Nom. N/A 8.73 mm | Fastener Material N/A 7075-T6 Aluminum | Standard Finish N/A Plain |
CAD
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Inventory N/A {0} |
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LKA-M4-1 | Thread Size x Pitch N/A M4 x 0.7 | A (Shank) Max. N/A 0.97 mm | Hole Size in Sheet + 0.08 N/A 6.76 mm | C Max. N/A 6.73 mm | E Nom. N/A 8.73 mm | Fastener Material N/A 7075-T6 Aluminum | Standard Finish N/A Plain |
CAD
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Inventory N/A {0} |
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LKA-M3-2 | Thread Size x Pitch N/A M3 x 0.5 | A (Shank) Max. N/A 1.38 mm | Hole Size in Sheet + 0.08 N/A 4.75 mm | C Max. N/A 4.73 mm | E Nom. N/A 6.35 mm | Fastener Material N/A 7075-T6 Aluminum | Standard Finish N/A Plain |
CAD
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LKA-M3-1 | Thread Size x Pitch N/A M3 x 0.5 | A (Shank) Max. N/A 0.97 mm | Hole Size in Sheet + 0.08 N/A 4.75 mm | C Max. N/A 4.73 mm | E Nom. N/A 6.35 mm | Fastener Material N/A 7075-T6 Aluminum | Standard Finish N/A Plain |
CAD
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LKA-M2.5-2 | Thread Size x Pitch N/A M2.5 x 0.45 | A (Shank) Max. N/A 1.38 mm | Hole Size in Sheet + 0.08 N/A 4.37 mm | C Max. N/A 4.35 mm | E Nom. N/A 6.35 mm | Fastener Material N/A 7075-T6 Aluminum | Standard Finish N/A Plain |
CAD
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LKA-M2.5-1 | Thread Size x Pitch N/A M2.5 x 0.45 | A (Shank) Max. N/A 0.97 mm | Hole Size in Sheet + 0.08 N/A 4.37 mm | C Max. N/A 4.35 mm | E Nom. N/A 6.35 mm | Fastener Material N/A 7075-T6 Aluminum | Standard Finish N/A Plain |
CAD
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LKS-M5-2MD | Thread Size x Pitch N/A M5 x 0.8 | A (Shank) Max. N/A 1.38 mm | Hole Size in Sheet + 0.08 N/A 7.92 mm | C Max. N/A 7.9 mm | E Nom. N/A 9.53 mm | Fastener Material N/A 300 Series Stainless Steel | Standard Finish N/A Black, Dry-film Lubricant |
CAD
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LKS-M5-1MD | Thread Size x Pitch N/A M5 x 0.8 | A (Shank) Max. N/A 0.97 mm | Hole Size in Sheet + 0.08 N/A 7.92 mm | C Max. N/A 7.9 mm | E Nom. N/A 9.53 mm | Fastener Material N/A 300 Series Stainless Steel | Standard Finish N/A Black, Dry-film Lubricant |
CAD
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Inventory N/A {0} |
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LKS-M4-2MD | Thread Size x Pitch N/A M4 x 0.7 | A (Shank) Max. N/A 1.38 mm | Hole Size in Sheet + 0.08 N/A 6.76 mm | C Max. N/A 6.73 mm | E Nom. N/A 8.73 mm | Fastener Material N/A 300 Series Stainless Steel | Standard Finish N/A Black, Dry-film Lubricant |
CAD
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LKS-M4-1MD | Thread Size x Pitch N/A M4 x 0.7 | A (Shank) Max. N/A 0.97 mm | Hole Size in Sheet + 0.08 N/A 6.76 mm | C Max. N/A 6.73 mm | E Nom. N/A 8.73 mm | Fastener Material N/A 300 Series Stainless Steel | Standard Finish N/A Black, Dry-film Lubricant |
CAD
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Inventory N/A {0} |
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LKS-M3-2MD | Thread Size x Pitch N/A M3 x 0.5 | A (Shank) Max. N/A 1.38 mm | Hole Size in Sheet + 0.08 N/A 4.75 mm | C Max. N/A 4.73 mm | E Nom. N/A 6.35 mm | Fastener Material N/A 300 Series Stainless Steel | Standard Finish N/A Black, Dry-film Lubricant |
CAD
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Inventory N/A {0} |
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LKS-M3-1MD | Thread Size x Pitch N/A M3 x 0.5 | A (Shank) Max. N/A 0.97 mm | Hole Size in Sheet + 0.08 N/A 4.75 mm | C Max. N/A 4.73 mm | E Nom. N/A 6.35 mm | Fastener Material N/A 300 Series Stainless Steel | Standard Finish N/A Black, Dry-film Lubricant |
CAD
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Inventory N/A {0} |
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LKS-M2.5-2MD | Thread Size x Pitch N/A M2.5 x 0.45 | A (Shank) Max. N/A 1.38 mm | Hole Size in Sheet + 0.08 N/A 4.37 mm | C Max. N/A 4.35 mm | E Nom. N/A 6.35 mm | Fastener Material N/A 300 Series Stainless Steel | Standard Finish N/A Black, Dry-film Lubricant |
CAD
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LKS-M2.5-1MD | Thread Size x Pitch N/A M2.5 x 0.45 | A (Shank) Max. N/A 0.97 mm | Hole Size in Sheet + 0.08 N/A 4.37 mm | C Max. N/A 4.35 mm | E Nom. N/A 6.35 mm | Fastener Material N/A 300 Series Stainless Steel | Standard Finish N/A Black, Dry-film Lubricant |
CAD
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LK-M5-2MD | Thread Size x Pitch N/A M5 x 0.8 | A (Shank) Max. N/A 1.38 mm | Hole Size in Sheet + 0.08 N/A 7.92 mm | C Max. N/A 7.9 mm | E Nom. N/A 9.53 mm | Fastener Material N/A Carbon Steel | Standard Finish N/A Black, Dry-film Lubricant over Zinc Phosphate |
CAD
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Inventory N/A {0} |
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LK-M5-1MD | Thread Size x Pitch N/A M5 x 0.8 | A (Shank) Max. N/A 0.97 mm | Hole Size in Sheet + 0.08 N/A 7.92 mm | C Max. N/A 7.9 mm | E Nom. N/A 9.53 mm | Fastener Material N/A Carbon Steel | Standard Finish N/A Black, Dry-film Lubricant over Zinc Phosphate |
CAD
N/A ![]() |
Inventory N/A {0} |
Add To Cart
Request Quote |
LK-M4-2MD | Thread Size x Pitch N/A M4 x 0.7 | A (Shank) Max. N/A 1.38 mm | Hole Size in Sheet + 0.08 N/A 6.76 mm | C Max. N/A 6.73 mm | E Nom. N/A 8.73 mm | Fastener Material N/A Carbon Steel | Standard Finish N/A Black, Dry-film Lubricant over Zinc Phosphate |
CAD
N/A ![]() |
Inventory N/A {0} |
Add To Cart
Request Quote |
LK-M4-1MD | Thread Size x Pitch N/A M4 x 0.7 | A (Shank) Max. N/A 0.97 mm | Hole Size in Sheet + 0.08 N/A 6.76 mm | C Max. N/A 6.73 mm | E Nom. N/A 8.73 mm | Fastener Material N/A Carbon Steel | Standard Finish N/A Black, Dry-film Lubricant over Zinc Phosphate |
CAD
N/A ![]() |
Inventory N/A {0} |
Add To Cart
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LK-M3-2MD | Thread Size x Pitch N/A M3 x 0.5 | A (Shank) Max. N/A 1.38 mm | Hole Size in Sheet + 0.08 N/A 4.75 mm | C Max. N/A 4.73 mm | E Nom. N/A 6.35 mm | Fastener Material N/A Carbon Steel | Standard Finish N/A Black, Dry-film Lubricant over Zinc Phosphate |
CAD
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Inventory N/A {0} |
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LK-M3-1MD | Thread Size x Pitch N/A M3 x 0.5 | A (Shank) Max. N/A 0.97 mm | Hole Size in Sheet + 0.08 N/A 4.75 mm | C Max. N/A 4.73 mm | E Nom. N/A 6.35 mm | Fastener Material N/A Carbon Steel | Standard Finish N/A Black, Dry-film Lubricant over Zinc Phosphate |
CAD
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LK-M2.5-2MD | Thread Size x Pitch N/A M2.5 x 0.45 | A (Shank) Max. N/A 1.38 mm | Hole Size in Sheet + 0.08 N/A 4.37 mm | C Max. N/A 4.35 mm | E Nom. N/A 6.35 mm | Fastener Material N/A Carbon Steel | Standard Finish N/A Black, Dry-film Lubricant over Zinc Phosphate |
CAD
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Inventory N/A {0} |
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LK-M2.5-1MD | Thread Size x Pitch N/A M2.5 x 0.45 | A (Shank) Max. N/A 0.97 mm | Hole Size in Sheet + 0.08 N/A 4.37 mm | C Max. N/A 4.35 mm | E Nom. N/A 6.35 mm | Fastener Material N/A Carbon Steel | Standard Finish N/A Black, Dry-film Lubricant over Zinc Phosphate |
CAD
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Inventory N/A {0} |
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