Clayton Off Road 1-7/8" Undersized Crow's Foot Jam Nut Wrench for Jeep Suspension

Is This for You?

• You're torquing 1-1/4" jam nuts on Clayton control arms, track bars, or tie rods and a standard 1-7/8" wrench is slipping or rounding the flats — this wrench is machined to 1.843" inside width, 0.032" undersized from nominal, for a tight 6-point contact fit that eliminates the slop that causes rounding.
• You're using a torque wrench to set jam nut preload on larger-diameter suspension hardware and need a crow's foot that accepts a 1/2" drive — designed for use with a 1/2" drive ratchet or torque wrench for accurate torque application in tight suspension access areas.
• You've rounded a 1-1/4" jam nut with a standard open-end wrench and want a tool that won't let it happen again — the 0.032" undersized bore contacts all 6 flats simultaneously, distributing torque load evenly and preventing the corner-loading that rounds hex flats.

The Result

• 1.843" inside width — 0.032" undersized from the nominal 1-7/8" spec for full 6-point contact on 1-1/4" jam nuts without slop or corner-loading.
• Crow's foot design with 1/2" drive — accepts a standard 1/2" drive ratchet or torque wrench for accurate torque application in confined suspension access areas.
• Eliminates jam nut rounding — the tight fit distributes torque across all 6 flats, not just 2 corners as with a standard open-end wrench.

The COR-2500125 is Clayton Off Road's purpose-built crow's foot jam nut wrench for 1-1/4" suspension jam nuts. Standard 1-7/8" open-end wrenches are manufactured to a nominal 1.875" jaw width — the manufacturing tolerance on both the wrench and the jam nut means the actual contact is often on 2 corners rather than all 6 flats, which concentrates torque load and rounds the hex under high torque. Clayton's wrench is machined to 1.843" inside width — 0.032" undersized from nominal — which takes up the clearance and forces full 6-point contact across all flats simultaneously. This distributes the torque load evenly and eliminates the corner-loading that rounds jam nuts during installation or service. The crow's foot design accepts a 1/2" drive ratchet or torque wrench, allowing accurate torque application in the confined access areas typical of Jeep suspension pivot locations. This is the larger of the two Clayton jam nut wrenches — for 1" jam nuts, see COR-2500100 (1.485" bore). Note: the 1.843" bore is intentionally undersized and may not fit all jam nut applications — verify your jam nut is a standard 1-1/4" hex before ordering.

Audit Table

Verified Fitment (OFAS Standard)

✅ Compatible with Clayton Off Road suspension jam nuts using a 1-1/4" hex (1-7/8" wrench size)
✅ Compatible with any Jeep suspension application using 1-1/4" jam nuts on control arms, track bars, or tie rods
❌ Does NOT fit 1" jam nuts — for 1" hex jam nuts, order COR-2500100 (1.485" bore)
❌ Does NOT fit jam nuts requiring a standard 1-7/8" wrench with full nominal clearance — the 1.843" bore is intentionally undersized and may not engage oversized or non-standard jam nuts
❌ Not for use with impact drivers — use with 1/2" drive ratchet or torque wrench only

Installation & Fabrication Notes

• Use with a 1/2" drive ratchet or torque wrench — do not use with an impact gun; impact torque will damage the crow's foot and the jam nut.
• Verify your jam nut is a standard 1-1/4" hex (1-7/8" wrench size) before use — the 1.843" bore will not engage a jam nut that is out-of-spec or has rounded flats.
• Apply the wrench squarely to the jam nut before applying torque — angled engagement defeats the 6-point contact advantage.
• Torque jam nuts to your specific Clayton arm or track bar specification — refer to Clayton's installation instructions for the correct torque value for your application.
• Inspect the wrench bore for wear after extended use — a worn bore will lose the undersized advantage and begin to slip on jam nut flats.

Wheel & Tire Fitment

Tool — no wheel or tire fitment restriction. Compatible with any Jeep platform running Clayton suspension components that use 1-1/4" hex jam nuts.

Engineering Question: Are your jam nuts a standard 1-1/4" hex (requiring a 1-7/8" wrench)? If your jam nuts use a 1" hex, order COR-2500100 instead. The 1.843" bore of this wrench is intentionally undersized — verify the hex dimension before ordering to ensure correct engagement.