MOPAR 68777037AA Hex Head Bolt Retainer

( Manufacturer Part Number: 68777037AA ), ( Part Type: Head Bolt ), ( Genuine Oem: Yes ), ( Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Parts Included: Only Part Reference 12 On The Diagram Is Included ), ( Replaces Part Number: 6507667aa )

Review MOPAR Genuine Hex Head Bolt And Retainer

The **Mopar 68777037AA Hex Head Bolt Retainer** is a precision-engineered fastener designed specifically for high-performance and heavy-duty applications within Mopar-equipped vehicles, particularly those featuring modern engine bay designs that prioritize both functionality and aesthetics. This bolt retainer is crafted from high-quality, corrosion-resistant steel, ensuring durability and longevity even under the most demanding conditions. Its hex head design allows for easy installation and removal with standard wrenches or sockets, providing a secure and reliable grip that prevents loosening due to vibration or thermal expansion common issues in high-stress environments like engine compartments or suspension systems. The retainer s sleek, low-profile shape is engineered to fit seamlessly within tight spaces, making it ideal for applications where clearance is limited, such as around intake manifolds, brake calipers, or exhaust components. Beyond its mechanical function, this retainer also serves an aesthetic purpose, offering a clean, factory-inspired finish that complements the modern styling of Mopar vehicles. Whether used in performance builds, restoration projects, or routine maintenance, the 68777037AA bolt retainer delivers a perfect balance of strength, precision, and compatibility, ensuring a secure and professional installation every time.

The part you re asking about is a **Mopar 68777037AA hex head bolt retainer**, commonly used in Mopar engines (such as the 392/426 Hemi) to secure valve covers, oil pans, or other components. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of Buying a Mopar 68777037AA Bolt Retainer**

1. **OEM Quality and Fit**

The Mopar brand is known for producing parts that meet or exceed factory specifications. This retainer is designed to fit precisely with the original equipment manufacturer (OEM) tolerances, reducing the risk of misalignment or improper sealing. This is particularly important in high-performance or high-stress applications where even minor deviations can lead to leaks or damage.

2. **Durability and Reliability**

Mopar parts are manufactured to withstand the rigors of automotive use, including exposure to heat, vibration, and engine fluids. The hex head design ensures a secure grip when tightened, reducing the likelihood of loosening over time especially critical in applications where the bolt retainer must hold under dynamic conditions (e.g., under a valve cover on a high-RPM engine).

3. **Compatibility with Aftermarket Parts**

Many aftermarket valve covers, oil pans, and related components are designed to work with Mopar retainers. Using an OEM or high-quality aftermarket retainer ensures compatibility, avoiding issues like stripped threads or improper sealing surfaces.

4. **Ease of Installation**

The hex head allows for straightforward installation with standard tools (e.g., socket wrench or impact driver). This makes it easier for DIYers or mechanics to install the part correctly without requiring specialized tools or techniques.

5. **Prevents Bolt Loss**

Bolt retainers (also called "bolt locks" or "bolt guards") prevent bolts from loosening or falling out, which is a common issue in high-vibration environments. This is especially valuable in engines where bolt loss could lead to catastrophic failure (e.g., a valve cover flying off or an oil pan detaching mid-drive).

6. **Cost-Effective for Long-Term Use**

While the upfront cost may be slightly higher than generic aftermarket alternatives, the reliability and longevity of Mopar parts can save money in the long run by avoiding repeated replacements or damage to other components.

7. **Warranty Coverage**

Mopar parts often come with a warranty, providing peace of mind in case of defects. This can be particularly useful if the retainer is used in a critical application where failure would be costly or dangerous.

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### **Cons of Buying a Mopar 68777037AA Bolt Retainer**

1. **Higher Upfront Cost**

Mopar parts are generally more expensive than generic or no-name aftermarket alternatives. For budget-conscious buyers, this may be a significant drawback, especially if only one or two retainers are needed.

2. **Potential Overkill for Minor Applications**

If the retainer is being used in a low-stress application (e.g., a non-performance vehicle where bolt loss is unlikely), the added cost may not be justified. In such cases, a simpler or cheaper bolt lock (e.g., a spring washer or a basic lockwasher) might suffice.

3. **Limited Availability**

Mopar parts may not be as widely stocked as generic aftermarket options, particularly in smaller auto parts stores. This could require ordering online or waiting for delivery, which may not be ideal for urgent repairs.

4. **Potential for Over-Tightening**

While the hex head design is user-friendly, there is a risk of over-tightening the retainer if not careful. This could strip the threads in the mating surface or damage the bolt retainer itself, especially if the material is softer than expected.

5. **Mixed Reviews on Aftermarket Alternatives**

Some users report that certain aftermarket bolt retainers (even from reputable brands) may not fit as snugly or may be made from lower-quality materials. While Mopar avoids this issue, it s worth noting that not all alternatives are equal.

6. **Weight Consideration**

Mopar retainers are typically made from steel, which adds slight weight to the component they secure. In high-performance or racing applications where weight reduction is critical, this may be a minor but notable factor.

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### **Conclusion**

The **Mopar 68777037AA bolt retainer** is a high-quality, reliable choice for applications where durability, precision fit, and long-term performance are priorities. It excels in high-stress environments such as Mopar Hemi engines, where bolt security is critical. The pros such as OEM compatibility, durability, and ease of use outweigh the cons for most serious enthusiasts, mechanics, and performance-oriented drivers.

However, if the application is low-stress or budget is a major concern, a carefully selected aftermarket alternative (e.g., from brands like Fel-Pro, ACDelco, or RockAuto) could offer comparable performance at a lower cost. Always ensure the aftermarket part is specifically designed for your application and meets the same material and fit standards as the Mopar original.

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### **Recommendation**

- You are working on a Mopar Hemi engine or another high-performance application where bolt security is critical.

- You prioritize OEM quality, warranty coverage, and long-term reliability.

- You have the budget for a premium part and want to avoid potential issues with generic alternatives.

- You are on a tight budget and the retainer is for a low-stress application (e.g., a stock or mildly modified engine).

- You can verify that the aftermarket part is made from high-quality materials and is specifically designed for your application (e.g., Fel-Pro or ACDelco bolt locks).

- You are confident in selecting a reputable brand that matches Mopar s standards.

For most Mopar Hemi owners or those rebuilding engines where bolt retention is non-negotiable, the **Mopar 68777037AA retainer is the safest and most reliable choice**. If you re unsure, consult with a trusted mechanic or perform research on the specific aftermarket options available for your application.

Details:

In stock orders ship within 24 hours. Bumper Bracket To Frame M12x1.75. Parts must be resalable and in the original packaging. Bumper Attaching.

Electrical parts are not returnable. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Manufacturer Part Number68777037AA.

part #: 68777037aa prices

• $24.21-$26.94

specifications vintagecarbumperus:

• for makes: Mopar
• mpn: 68777037aa
• part type: Head Bolt
• genuine oem: Yes
• warranty: 1 Year
• fitment type: Direct Replacement
• parts included: Only Part Reference 12 On The Diagram Is Included
• replaces part number: 6507667aa

general vintagecarbumperus:

• Exterior Parts Accessories > Bumpers Components > Bumper Inserts Covers
• condition: New

returns vintagecarbumperus:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

offer vintagecarbumperus:

• availability: In Stock
• sold: 0
• started: June 1, 2026
• quantity: 4
• options: Ship-to-home

shipping vintagecarbumperus:

• class: Standard
• transit: 3-9 Days
• type: Fixed
• service: Standard
• cost: $11.50

seller vintagecarbumperus:

• city: Vancouver, Washington
• # reviews: 4680
• rating: 99.6%

payments vintagecarbumperus:

• credit card: Mastercard
• other
• wallet: Google-pay

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