1. Boat Trailer Parts For Sale
  2. sku: 5598897263170872
  3. SEACHOICE 57320

SEACHOICE 57320 Square Bolt 3/8 1-5/8 3-9/16BULK

57320 Seachoice Square U-bolt 3/8 X 1-5/8 3-9/16bulk

( Brand: Seachoice ), ( Manufacturer Part Number: 57320 ), ( Part Type: Bolt )

Review SEACHOICE Square U bolt 3/8 1-5/8 3-9/16bulk

The **Seachoice 57320 Square U-Bolt** is a high-performance marine-grade fastening solution designed to meet the rigorous demands of boating, sailing, and offshore applications where reliability and durability are paramount. This bulk-packaged U-bolt features a **3/8-inch diameter shank**, providing a robust yet manageable thickness for securing critical components without excessive weight or material waste. The **1-5/8-inch leg length** offers versatility for a wide range of mounting scenarios, from securing fuel tanks and bilge systems to reinforcing deck hardware, while the **3-9/16-inch overall width** ensures a snug, secure fit in most standard mounting holes or brackets. Crafted from **high-strength, corrosion-resistant steel**, this U-bolt is treated with a protective coating to withstand prolonged exposure to saltwater, humidity, and UV degradation, making it ideal for both saltwater and freshwater environments. The **square shank design** eliminates the risk of rotation during tightening, ensuring a consistent and secure hold, while the **smooth, machined threads** guarantee a tight, leak-proof connection when paired with compatible nuts or washers. Whether used in bulk for large-scale marine projects or as a reliable spare for maintenance and repairs, this U-bolt delivers the strength and precision required to keep vessels operational under demanding conditions. Its bulk packaging ensures cost-effective access to multiple units, making it a practical choice for fleet owners, boatyards, and DIY enthusiasts alike.

### **Pros and Cons of buying a SeaChoice 57320 Square U-Bolt (3/8" x 1-5/8" x 3-9/16") in Bulk**

#### **Pros:**

1. **Durability and Strength** The SeaChoice 57320 is designed for heavy-duty marine applications, including sailboats, fishing vessels, and other watercraft. Its square shape provides better grip and resistance to loosening under vibration, making it ideal for high-stress environments like rigging, deck hardware, and mooring systems.

2. **Corrosion Resistance** Made from high-quality stainless steel (likely 316 or 304 grade, depending on the variant), this U-bolt is resistant to saltwater corrosion, rust, and marine fouling. This extends its lifespan significantly compared to carbon steel or galvanized alternatives.

3. **Precision Engineering** The square design reduces the risk of rotation under load, which is critical in applications where stability is paramount (e.g., securing lines, chains, or rigging components). The consistent threading ensures a secure fit with compatible hardware.

4. **Versatility** The bulk purchase allows for flexibility in projects, whether for repairs, upgrades, or new installations. The dimensions (3/8" shank, 1-5/8" width, 3-9/16" length) make it suitable for a range of marine and industrial uses, including:

- Securing fenders or bumpers.

- Mounting cleats, winches, or pulleys.

- Reinforcing deck fittings.

- DIY projects requiring robust fasteners.

5. **Cost-Effectiveness in Bulk** Buying in bulk reduces the per-unit cost, making it a cost-effective solution for larger projects or frequent replacements. Discounts or bulk pricing can also lower material expenses for businesses or hobbyists.

6. **Compatibility with Marine Standards** SeaChoice is a reputable brand in the marine industry, adhering to industry standards for quality and performance. The U-bolt is likely compatible with common marine hardware, such as turnbuckles, shackles, and stainless steel rods.

7. **Ease of Installation** The standard threading (likely UNC or UNF) means it can be used with standard wrenches or sockets, and the square design simplifies alignment during installation.

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#### **Cons:**

1. **Higher Upfront Cost** Compared to carbon steel or lower-grade stainless steel U-bolts, stainless steel options like this one are more expensive. While the long-term benefits (corrosion resistance) justify the cost, the initial investment may be a drawback for budget-conscious buyers.

2. **Specialized Tools May Be Needed** For very tight or hard-to-reach installations, a specialized wrench or extension may be required to tighten the U-bolt securely. This could add to the tooling costs if not already owned.

3. **Potential for Overkill in Some Applications** If the U-bolt is being used in a low-stress or non-marine environment (e.g., land-based projects), its robust design might be unnecessary, leading to wasted material or higher costs.

4. **Weight** Stainless steel is heavier than carbon steel. While this adds to its durability, it may make handling or installation more cumbersome, especially in bulk quantities.

5. **Limited Availability of Replacement Parts** If the U-bolt fails prematurely (though unlikely with proper material), sourcing exact replacements may be challenging compared to more common fasteners. Always verify the supplier s stock or lead times.

6. **Potential for Misalignment** The square design, while beneficial for grip, can sometimes make it harder to align the U-bolt perfectly during installation, especially in tight spaces. Precision may require extra care.

7. **Environmental Considerations** Stainless steel is not biodegradable, and bulk purchases may contribute to waste if not used entirely. However, this is a minor concern compared to the product s benefits.

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### **Conclusion:**

The SeaChoice 57320 square U-bolt is an excellent choice for marine applications where durability, corrosion resistance, and reliability are critical. Its square design prevents loosening under vibration, making it ideal for rigging, deck hardware, and other high-stress marine uses. While the upfront cost is higher than carbon steel alternatives, the long-term performance and reduced maintenance needs justify the investment.

For **marine enthusiasts, boat owners, or professionals working in saltwater environments**, this U-bolt is highly recommended, especially when purchasing in bulk for cost savings. If you re working on a **land-based project with lower stress requirements**, a lower-cost fastener might suffice, but the SeaChoice option remains a top-tier choice for demanding applications.

### **Recommendation:**

- **Buy in bulk** if you plan to use multiple U-bolts for projects, repairs, or inventory (e.g., for a boatyard, sailing club, or DIY marine work).

- **Verify the stainless steel grade** (316 is superior for saltwater; 304 may suffice for freshwater or less corrosive environments).

- **Check for compatibility** with your existing hardware (e.g., turnbuckles, shackles) to ensure seamless integration.

- **Store properly** to prevent damage (e.g., in a dry, rust-proof container) to maintain its condition until use.

For most marine applications, this U-bolt is a **strong, reliable, and cost-effective solution** when purchased from a trusted supplier like SeaChoice.

Details:

SEACHOICE Square U-BOLT 7/16 x 3-1/16 4-5/16. Seachoice Trailer Steel Square U-Bolt 4-1/16 x 2-13/16 Thread #7/16 14 57241. This platform is now integrated and seamless. Seachoice 52561 LED Stud Mount Side Marker Light Amber.

Solid galvanized steel u-bolts with nuts and lock washers. Covers most U-Bolt applications. SEACHOICE Square U-BOLT 7/16 x 1-9/16 3-9/16. One per card or in bulk.

part #: 57320 prices

  • $5.60-$12.50

specifications traiparboa:

  • brand: Seachoice
  • mpn: 57320
  • part type: Bolt

returns traiparboa:

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

payments traiparboa:

  • credit card: Visa
  • wallet: Paypal
  • other

general traiparboa:

  • Parts Accessories > Boat Parts > Trailer Parts
  • condition: New

seller traiparboa:

  • rating: 99.1%
  • # reviews: 113271
  • city: Wheeling, Illinois

offer traiparboa:

  • options: Ship-to-home
  • started: June 10, 2026
  • availability: In Stock
  • sold: 0

shipping traiparboa:

  • type: Fixed
  • class: Economy
  • cost: $0.00
  • transit: 14-21 Days
  • service: Economy
part type: bolt,
category: boat parts > trailer parts, sku: 5598897263170872,
Seachoice 57320 Is Similar To:
traiparboa logo
2 offers $5.60–$12.50 USD
  • New. Offer #1 priced at $12.50 + $0.00 shipping estimate = $12.50* total. Seachoice 52561 LED Stud Mount Side Marker Light Amber. Seachoice Trailer Steel Square U-Bolt 4-1/16" x 2-13/16" Thread #7/16"-14 57241.FREE SHIPPING
  • New. Offer #2 priced at $5.60 + $8.95 shipping estimate = $14.55* total. Bulk Pack. Solid galvanized steel u-bolts with nuts and lock washers.+$8.95 shipping

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