Clayton Off Road 9/16-18 x 3.0" Grade 8 Bolt Kit | All-Metal Top-Lock Nut | Jeep TJ/LJ/JK/XJ/ZJ/WJ Suspension Hardware | SKU COR-1100115
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Shipping & Delivery
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Fitment, Shipping & Product Support
The Clayton Off Road COR-1100115 is a precision-spec hardware kit for Clayton suspension pivot applications requiring 9/16"-18 fine thread at 3.0" grip length — including track bar mounts and other suspension pivot points across Clayton's Jeep product line. Grade 8 bolt (ANSI B1.1 UNF Class 2B thread) paired with two hardened washers and an all-metal top-lock nut rated IFI-100/107 Grade C — the all-metal equivalent of a Grade 8 fastener. The top-lock nut's deformed thread crown creates 2 to 3 locking zones that engage under wrench torque, maintaining clamp load under vibration and thermal cycling where nylon insert locknuts lose retention over time. Torque spec: 146 ft-lbs. Zinc-plated for baseline corrosion resistance.
Used across Clayton suspension hardware for JK Wrangler, TJ Wrangler, LJ Wrangler, WJ Grand Cherokee, ZJ Grand Cherokee, and XJ Cherokee applications — confirm your specific component's bolt spec before ordering, since multiple thread diameters exist in Clayton's hardware lineup.
Component Specifications
| Spec | Detail |
|---|---|
| Part Number | COR-1100115 |
| Brand | Clayton Off Road |
| Bolt Size | 9/16"-18 x 3.0" |
| Thread Type | Fine thread (UNF) |
| Thread Standard | ANSI B1.1 UNF Class 2B |
| Bolt Grade | Grade 8 |
| Locknut Type | All-metal top-lock, IFI-100/107 Grade C |
| Locking Mechanism | Deformed thread crown — 2 to 3 locking zones |
| Washers | 2x hardened washers |
| Torque Spec | 146 ft-lbs |
| Finish | Zinc plated |
| Kit Contents | 1 bolt, 2 washers, 1 all-metal top-lock nut |
| Shipping Weight | 1 lb |
| Shipping Dimensions | 4" x 1" x 1" |
| Used In | Track bar pivot mounts and other Clayton suspension pivot applications |
| Sold As | Each — complete kit |
What Is and Is NOT Included
| Item | Included |
|---|---|
| 1x Grade 8 bolt, 9/16"-18 x 3.0" | ✓ |
| 2x hardened washers | ✓ |
| 1x all-metal top-lock nut | ✓ |
| Anti-seize compound | ✗ NOT included — apply separately for salt, mud, or submerged conditions |
| Torque wrench | ✗ NOT included — required for proper installation |
Compatible Vehicle Applications
| Vehicle | Years |
|---|---|
| Jeep Wrangler JK | 2007–2018 |
| Jeep Wrangler TJ | 1997–2006 |
| Jeep Wrangler LJ | 2004–2006 |
| Jeep Grand Cherokee WJ | 1999–2004 |
| Jeep Grand Cherokee ZJ | 1993–1998 |
| Jeep Cherokee XJ | 1984–2001 |
This is a universal hardware spec used across multiple Clayton suspension components on these platforms — confirm which specific Clayton part you're servicing before ordering, since not every pivot point on every platform uses this exact bolt size.
Clayton Bolt Kit Comparison — Confirm Your Thread Diameter
| Kit | Bolt Size | Torque Spec |
|---|---|---|
| COR-1100119 | 1/2"-20 x 3.5" | ~102 ft-lbs |
| COR-1100115 (this listing) | 9/16"-18 x 3.0" | 146 ft-lbs |
| COR-1100116 | 9/16"-18 x 4.5" | 146 ft-lbs |
| COR-1100120 | 5/8"-18 x 4.0" | 204 ft-lbs |
| COR-1100121 | 5/8"-18 x 4.5" | 204 ft-lbs |
Same thread diameter, different grip lengths exist within each size family (e.g., 9/16" comes in both 3.0" and 4.5" grip lengths) — measure your application's grip length, not just thread diameter, before ordering.
Verified Fitment
| Application | Status |
|---|---|
| Clayton suspension pivots specifying 9/16"-18 x 3.0" Grade 8 hardware | ✓ |
| Clayton HD track bar bushing/flange applications | ✓ |
| Applications requiring 1/2"-20 hardware | ✗ Order COR-1100119 |
| Applications requiring 5/8"-18 hardware | ✗ Order COR-1100120 or COR-1100121 |
| Metric thread applications | ✗ Not compatible |
| Skid plate mounting | ✗ Suspension pivot hardware only |
Critical Compatibility
| Configuration | Notes |
|---|---|
| Wrong thread diameter | A 1/2" bolt in a 9/16" hole results in improper clamp load; a 9/16" bolt will not thread into a 1/2" hole. Measure before ordering. |
| Top-lock nut reuse | Single-use by IFI specification — do not reuse a previously torqued top-lock nut; replace if removed |
| Impact gun installation | Do not impact-gun to final torque — use a calibrated torque wrench only |
| High-corrosion environments | Zinc plating is baseline protection only — apply anti-seize to threads for salt, mud, or submerged conditions |
Common Questions
Will this nut thread on by hand?
No — and that's expected. The top-lock design will not thread to final position by hand. Start threads by hand to confirm engagement, then drive to torque with a calibrated wrench.
What's the difference between this and COR-1100116?
Same 9/16"-18 thread diameter and same 146 ft-lb torque spec — different grip length. This kit (COR-1100115) is 3.0" grip length; COR-1100116 is 4.5". Measure your application's grip length before choosing.
Can I reuse this top-lock nut if I remove it for service?
No. All-metal locknuts are single-use by IFI specification. Replace the nut any time it's removed from a torqued position.
Do I need anti-seize?
Zinc plating provides baseline corrosion resistance but is not a substitute for anti-seize in high-corrosion environments. Apply anti-seize to the threads if your Jeep regularly sees salt, mud, or submerged conditions.
The Obsidian Take
The COR-1100115 is for the Jeep owner replacing or servicing Clayton suspension pivot hardware — track bar mounts and similar pivot points — who needs the exact 9/16"-18 x 3.0" Grade 8 spec rather than a hardware-store substitute. The all-metal top-lock nut holds clamp load under vibration and heat cycling that nylon insert locknuts can't match over time.
The only real decision point is confirming your exact bolt size and grip length before ordering — Clayton's lineup includes several similar-looking kits at different diameters and lengths. Measure first, order once.
Non-Returnable Notice: Installed fasteners are non-returnable. Confirm thread diameter and grip length match your application before ordering.
Manufacturer Data Disclaimer: Specifications sourced from Clayton Off Road's own product documentation. Obsidian Forged Auto Supply is an authorized Clayton Off Road dealer. Manufacturer specifications are subject to change without notice.