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The thread locking torque performance of Type PL and PLC PEMHEX® self-clinching fasteners is equivalent to applicable NASM25027 specifications. A nylon hexagonal element provides a reusable, non-metallic prevailing torque thread lock. The strong knurled collar receives the installation force and resists torque. The spin resistance of the knurl greatly exceeds the torque that can be exerted by the self-locking feature. As the knurled collar is embedded in the sheet, the undercut cavity beneath the collar is filled with displaced sheet material, thereby captivating the fastener in the sheet.

The color blue for fastener locking elements is a registered trademark. Unified fasteners have a blue nylon locking element and metric fasteners have a black nylon locking element.
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Unit of Measure
Items
Nylon insert, locking thread nuts – PL, PLC

Nylon Insert Self-Locking Fasteners - Types PL and PLC - Unified
Nylon insert, locking thread nuts – PL, PLC

Nylon Insert Self-Locking Fasteners - Types PL and PLC - Unified
Nylon insert, locking thread nuts – PL, PLC

Nylon Insert Self-Locking Fasteners - Types PL and PLC - Unified
Nylon insert, locking thread nuts – PL, PLC

Nylon Insert Self-Locking Fasteners - Types PL and PLC - Unified
Nylon insert, locking thread nuts – PL, PLC

Nylon Insert Self-Locking Fasteners - Types PL and PLC - Unified
Thread Size N/A .112-40 (#4-40) N/A .138-32 (#6-32) N/A .164-32 (#8-32) N/A .190-32 (#10-32) N/A .112-40 (#4-40)
Thread Code N/A 440 N/A 632 N/A 832 N/A 032 N/A 440
Material Code N/A
A (Shank) Max. N/A .060 in
Sheet Thickness1 N/A .040 to .070 in
Hole Size in Sheet + .003 - .000 N/A .234 in N/A .265 in N/A .297 in N/A .312 in N/A .234 in
C Max.
N/A .233 in a1363_1.jpg N/A .264 in a1363_1.jpg N/A .296 in a1363_1.jpg N/A .311 in a1363_1.jpg N/A .233 in a1363_1.jpg
D Max. N/A .215 in N/A .246 in N/A .278 in N/A .293 in N/A .215 in
E Max. N/A .274 in N/A .305 in N/A .338 in N/A .353 in N/A .274 in
T Max. N/A .130 in N/A .130 in N/A .155 in N/A .165 in N/A .130 in
Min. Dist. Hole C/L to Edge2 N/A .17 in N/A .19 in N/A .22 in N/A .250 in N/A .17 in
Max. Hole in Attached Parts N/A .132 in N/A .158 in N/A .184 in N/A .210 in N/A .132 in
Fastener Materials - Locking Element N/A Blue Nylon
For Use in Sheet Hardness3 N/A HRB 70 / HB 125 or Less
Thread Specification N/A Internal, ANSI B1.1, 2B
Fastener Material N/A Heat-Treated Carbon Steel
Standard Finish N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless N/A
Optional Finish4 N/A N/A N/A N/A N/A Zinc plated per ASTM B633, SC1 (5µm), Type II, yellow
CAD Supplier N/A PennEngineering® (PEM®)
Inventory N/A {0} N/A {0} N/A {0} N/A {0} N/A {0}
  • 1 - Can be used in panel thickness of .040” to .060” / 1 mm to 1.53 mm provided the fastener is not fully installed. The knurled collar must be left protruding above the sheet to the degree that the sheet thickness is less than .060” / 1.53 mm.

    - K
  • 2 To minimize sheet distortion and maximize product performance, use a centerline-to-edge value greater or equal to the value specified.
  • 3 HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.
  • 4 “BL” suffix will be added to part number to designate DuraBlack™ finish.