Clayton Off Road 5/16-18 x 1" Flat Head Socket Cap Skid Plate Bolt Kit for Jeep TJ/LJ

Is This for You?

• You're mounting a Clayton skid plate on your TJ or LJ and need the correct flush-mount hardware — flat head socket cap screws sit countersunk and flush with the skid surface, eliminating the raised bolt head profile that catches rocks, roots, and trail debris.
• You've lost, stripped, or rounded out the original skid plate bolts and need an exact replacement set — this is the OEM-spec hardware for Clayton TJ/LJ skid plate installations: 5/16"-18 coarse thread, 1" length, 3/16" hex socket drive, 11-piece set.
• You're building a clean skid plate installation and won't accept hardware that snags on obstacles — countersunk flat head geometry keeps the underside profile smooth and snag-free through rock gardens, ledges, and high-centering situations.

The Result

• Flat head countersunk profile — sits flush with the skid plate surface, no raised bolt head to catch on rocks, roots, or trail obstacles.
• High-strength alloy steel at Grade 8 equivalent tensile strength — resists shear and pull-through under the impact loads of off-road skid plate use.
• Zinc plating for corrosion resistance — retards oxidation in normal atmospheric and off-road environments. Sold as a set of 11.

The COR-4100005 skid plate bolt kit uses 5/16"-18 coarse thread flat head socket cap screws at 1" length — the correct spec for flush-mounting Clayton skid plate sections on the 1997–2006 Jeep Wrangler TJ and LJ platform. The flat head countersunk geometry allows the bolt to sit fully recessed into the skid plate mounting hole, producing a smooth underside profile that slides over rocks and obstacles without catching. Drive is a 3/16" hex socket (Allen), which provides higher torque transfer than a standard Phillips or slotted drive and resists cam-out under the torque loads required for skid plate installation. Material is high-strength alloy steel at Grade 8 equivalent tensile strength — rated for the shear and pull-through forces generated when a skid plate contacts a rock or ledge at speed. Zinc plating retards corrosion in normal atmospheric conditions. Sold as a set of 11 bolts. Note: the 5/16" spec is a smaller thread diameter than the 3/8" kit (COR-4100003) — verify your skid plate's mounting hole thread spec before ordering.

Audit Table

Verified Fitment (OFAS Standard)

✅ Fits 1997–2006 Jeep Wrangler TJ — Clayton skid plate installations requiring 5/16"-18 x 1" flat head socket cap hardware
✅ Fits 2004–2006 Jeep Wrangler LJ Unlimited — Clayton skid plate installations requiring 5/16"-18 x 1" flat head socket cap hardware
❌ Does NOT replace 3/8" bolt applications (see COR-4100003 for 3/8"-16 x 1" kit)
❌ Does NOT replace metric thread skid plate hardware
❌ Not for use in structural suspension pivot applications — skid plate mounting only

Installation & Fabrication Notes

• Use a 3/16" hex (Allen) key or bit — do not attempt to drive with a standard hex wrench that doesn't fully seat; partial engagement will round the socket.
• Apply thread locker (medium strength, blue) to threads before installation — skid plate bolts are subject to vibration and impact that can back out hardware over time.
• Torque to 8–10 ft-lbs for 5/16"-18 alloy steel in steel — verify with Clayton's skid plate installation spec if provided.
• Countersink depth in the skid plate must match the flat head angle (typically 82°) — if the bolt head sits proud of the surface, the countersink is undersized and must be corrected before installation.
• Inspect bolts after hard trail use — replace any bolt showing shear deformation, thread damage, or socket rounding before the next run.

Wheel & Tire Fitment

Hardware kit — no wheel or tire fitment restriction. Compatible with Clayton skid plate installations on 1997–2006 Jeep Wrangler TJ and LJ using 5/16"-18 x 1" flat head socket cap hardware.

Engineering Question: Are you replacing hardware on a Clayton skid plate or installing a new skid section? Confirm your skid plate's mounting hole thread spec is 5/16"-18 coarse thread — not 3/8"-16. Using the wrong thread size will result in cross-threading or improper clamp load. If your skid uses 3/8" hardware, order COR-4100003 instead.