RGP Heavy Duty 9/16" x 3-1/2" Shackle Bolts and Locknuts for 7K Trailer Equalizers

$4.38 USD

Shipping calculated at checkout.

Quantity

Pack of 2 Pack of 4

Product variants

Care information

To ensure optimal performance and extend the service life of your new trailer components, please follow these care guidelines after purchase:

Before installation, check all parts for shipping damage or missing components. Do not install damaged parts.
Always use correct tools and torque settings. Improper installation can lead to premature wear or failure.
For bearings, suspensions, and brake components, apply high-quality trailer grease before first use if not pre-greased.
Some parts (like brake assemblies) require a short break-in period to achieve full performance. Follow manufacturer instructions for best results.
Recheck fasteners, grease levels, and moving components after 100 miles of towing, then at regular intervals.
After exposure to water, road salt, or mud, clean and dry parts thoroughly. Apply anti-rust treatment if needed.
If storing unused parts, keep them in a dry, sealed container away from moisture and direct sunlight.

Delivery and Shipping

Handling Time: Orders ship out within 1 business day after payment is received.

Shipping Methods: We use trusted carriers like UPS, FedEx, or USPS based on package size and destination.

Delivery Time: Estimated delivery within 2–6 business days (U.S. domestic orders).

Tracking: A tracking number will be provided once your order is dispatched.

Q1 Will this brake fit my trailer?

This brake assembly fits most standard 7,000 lb trailer axles that use 12" × 2" electric brakes with a 5-bolt mounting flange. Please verify your axle rating and brake dimensions before ordering. If you're unsure, send us your axle tag or hub information and we'll help confirm compatibility.

Q2 Does it fit Dexter or Lippert axles?

Yes. It is compatible with many standard Dexter, Lippert, Rockwell American, AL-KO, and other 7,000 lb trailer axles that use a standard 12" × 2" brake assembly. Always verify your axle specifications before purchasing.

Q3 Is this a self-adjusting brake?

Yes. This is a self-adjusting electric brake assembly, which automatically maintains proper brake shoe clearance during normal operation. This reduces maintenance and helps provide consistent braking performance.

Replacement & Compatibility:

Designed for securing slipper leaf springs, equalizers, and suspension components on heavy-duty trailer suspension systems.

Suspension Compatibility: Commonly used with 7,000 lb (7K) trailer axle slipper spring suspension setups.

Fitment: Fits suspension hangers, equalizers, and spring components that accept a 9/16" diameter shackle bolt.

Trailer Applications: Suitable for utility trailers, equipment trailers, flatbed trailers, car haulers, livestock trailers, and other heavy-duty tandem- or triple-axle trailers.

Specifications:

Shackle Bolt Details:

Bolt Type: Slipper Spring / Equalizer Shackle Bolt
Bolt Diameter: 9/16"
Bolt Length: 3-1/2"
Thread Size: 9/16"-18 Fine Thread
Hardware Style: Standard Non-Greaseable Shackle Bolt
Application Compatibility: Commonly used with 7,000 lb trailer suspension systems
Material: Heavy-Duty High-Strength Steel

Locknut Details:

Nut Type: Reversible Hex Locknut
Inside Thread Diameter: 9/16"
Thread Pitch: 18 TPI
Thread Size: 9/16"-18 Fine Thread
Material: High-Tensile, Heat-Treated Steel
Design: Reversible for installation from either side

What's Included by Kit Option:

Pack of 2:

2 x 9/16" x 3-1/2" Heavy-Duty Trailer Shackle Bolts
2 x 9/16"-18 Reversible Hex Locknuts

Pack of 4:

4 x 9/16" x 3-1/2" Heavy-Duty Trailer Shackle Bolts
4 x 9/16"-18 Reversible Hex Locknuts

Product Overview:

Worn, bent, or heavily rusted suspension bolts can allow the trailer’s springs and equalizers to shift out of position, potentially causing uneven tire wear, poor axle alignment, dog-tracking, and premature suspension component failure.

This heavy-duty shackle bolt and locknut kit provides the matched hardware needed to replace damaged or missing fasteners in compatible 7K trailer suspension systems. Each 9/16" diameter bolt measures 3-1/2" long and features a fine 9/16"-18 thread for secure engagement with the included reversible hex locknut.

The high-strength steel shackle bolts are built to withstand the repeated movement, road shock, and vibration experienced by commercial and utility trailers. The matching locknuts are engineered to resist loosening under continuous suspension movement, helping maintain proper spring and equalizer positioning over long-distance towing.

Unlike standard hex nuts that may gradually back off under vibration, the included locking nuts maintain a secure hold on the bolt threads. Their reversible design also allows them to be started from either side, making installation more convenient during suspension repairs or complete rebuilds.

Ideal for replacing worn suspension hardware or keeping spare fasteners available for trailer maintenance, this matched bolt-and-locknut kit provides dependable hardware for heavy-duty towing applications.

Key Features:

Complete matched shackle bolt and locknut kit
9/16" diameter x 3-1/2" long bolts
Fine 9/16"-18 thread configuration
Reversible hex locknuts resist vibration-related loosening
Heavy-duty steel construction for demanding trailer applications
Commonly used with 7K slipper spring suspension systems
Suitable for suspension repairs, maintenance, and rebuilds
Available in packs of 2 or 4

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