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StoreFront / SkyLoc® Structural Fasteners / SkyLoc® Stud Nut (SN) Series / SkyLoc® Quad Lead Knurled Head

SkyLoc® Knurled Head Studs — Tactile Grip for Gloved Operations

SkyLoc SN Knurled Head Studs Reference Table

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Knurled Head SN studs feature a textured grip surface designed for operations in gloved, cold-weather, or tool-limited environments. The knurling provides positive manual engagement without requiring specialized tools.

⚙ Design Features

Aggressive knurl pattern for reliable grip
Tool-free installation/removal capability
Suitable for field maintenance operations
Same structural performance as smooth-head variants

📋 Typical Applications

Field-serviceable panels
Cold-weather operations
Glove-intensive maintenance environments
Emergency access panels

🔧 QL8C62 Installation

Kee'd Threaded Insert — Install .010–.030 below surface

Drill support structure with 29/64 drill to depth of .775 (thru hole tap)
C'Sink 82° or 100° to .510–.520 width
Tap 1/2-13 UNC-2B, .650 min depth
Install .010–.030 below surface
For hardened supports, broach with QL8-B1 Tool
Drive Kees with Skybolt QL8-T1 Tool

🔧 QL8C78 Installation

Non-Kee'd Threaded Insert — Receptacle is flush with surface

Drill support structure with 25/64 drill to depth of .775 (thru hole tap)
C'Bore .105 to .140
Tap 7/16-20 UNF-2B
Loctite threads to desired depth

📋 Important Notes:

(1) Ensure proper length stud nut is used for panel thickness. If torque loads exceed 15 in-lbs and outer panel is not secure, the cams will be damaged requiring receptacle replacement. If cams are skipping, replace stud nut.
(2) If the stud nut is too long, it will force the end of the stud nut to compress the springs into coil bind. When this happens, the notches on the end will shear the small nubs on top of the upper cam, rendering the locking feature useless.
(3) Minimum Grip reduces 1:1 for every .001" receptacle is below the surface.
(4) If Min Grip is exceeded (less than charted), the cam system will fail requiring replacement of the receptacle.

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SkyLoc® Quad Lead Knurled Head

QL8C28-0KN

L=.343 Grip .093-.155

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$11.56 - $14.82 Price Details

Alternate Part Number 1: CA1828-0

QL8C28-1KN

L=.437 Grip .156-.250

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$11.56 - $14.82 Price Details

Alternate Part Number 1: CA1828-1

QL8C28-2KN

L=.531 Grip .251-.343

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$11.56 - $14.82 Price Details

Alternate Part Number 1: CA1828-2

QL8C28-3KN

L=.625 Grip .344-.437

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$11.56 - $14.82 Price Details

Alternate Part Number 1: CA1828-3

QL8C28-4KN

L=.718 Grip .438-.531

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$13.69 - $17.55 Price Details

Alternate Part Number 1: CA1828-4

QL8C28-5KN

L=.812 Grip .532-.625

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$13.69 - $17.55 Price Details

Alternate Part Number 1: CA1828-5

QL8C28-6KN

L=.906 Grip .626-.718

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$13.69 - $17.55 Price Details

Alternate Part Number 1: CA1828-6

QL8C28-7KN

L=1.000 Grip .719-.812

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$13.69 - $17.55 Price Details

Alternate Part Number 1: CA1828-7

QL8C28-8KN

L=1.093 Grip .813-.906

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$28.86 - $37.00 Price Details

Alternate Part Number 1: CA1828-8

QL8C28-9KN

L=1.187 Grip .907-.1000

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$28.86 - $37.00 Price Details

Alternate Part Number 1: CA1828-9

QL8C28-10KN

L=1.281 Grip 1.001-1.093

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$28.86 - $37.00 Price Details

Alternate Part Number 1: CA1828-10

QL8C28-11KN

L=1.375 Grip 1.094-1.187

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$28.86 - $37.00 Price Details

Alternate Part Number 1: CA1828-11

QL8C28-12KN

L=1.468 Grip 1.188-1.281

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$28.86 - $37.00 Price Details

Alternate Part Number 1: CA1828-12

QL8C28-13KN

L=1.562 Grip 1.282-1.375

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