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3/8"-16 x 4 Hex Cap Screws, Grade 8 Alloy Steel, Zinc Yellow, 50 Pack | Partially Threaded. Made in USA. Hex head with washer face. ASME B18.2.1. Hex bolts.

3/8"-16 x 4 Hex Cap Screws, Grade 8 Alloy Steel, Zinc Yellow, 50 Pack | Partially Threaded. Made in USA. Hex head with washer face. ASME B18.2.1. Hex bolts.

3/8"-16 x 4 Hex Cap Screws, Grade 8 Alloy Steel, Zinc Yellow, 50 Pack | Partially Threaded. Made in USA. Hex head with washer face. ASME B18.2.1. Hex bolts.

✅ In stock ⭐ Lowest price we've tracked

F

Grade

💤 Not a Deal

24/100

Current Price

$91.99

Analysis Confidence 58%

⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.

Check Deal at Amazon

Price verified Aug 9, 2026 9:18 PM · Prices & availability subject to change

Is This a Good Price on Amazon?

💤 Not a Deal

💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
💰The current price sits right around what this item typically fetches.
📉Our analysis places this at the most competitive price point we have ever tracked for this product — an exceptional moment to buy.
➡️Pricing has held fairly steady, with no strong push in either direction.

How We Scored This Deal

Price Competitiveness 0/28

Recent Value 0/22

Market Standing 0/20

Deal Strength 20/20

Momentum 4/10

📝 Product Overview

🏪 Sold by Newport Fasteners

🚚 Shipping Free Shipping

Product Details

✓GRADE 8 HIGH-STRENGTH STEEL: Meets SAE J429 specifications with minimum tensile strength of 150,000 PSI and proof load of 120,000 PSI — the highest strength grade for standard carbon steel hex cap screws, essential for critical structural and high-stress applications

✓PROUDLY MADE IN USA: Domestically manufactured from American-sourced steel with full material traceability; supports US manufacturing jobs while ensuring consistent quality control and compliance with Buy American Act requirements

✓ZINC YELLOW CHROMATE FINISH: Distinctive gold-colored plating provides superior corrosion resistance compared to clear zinc while serving as instant visual identification of Grade 8 strength; meets 96-hour salt spray requirements per ASTM B117

✓Manufactured to ASME B18.2.1 & SAE J429 specifications

✓Tensile Strength: 150,000 psi. min

✓PARTIALLY THREADED SHANK DESIGN: 1 inch of thread engagement with 3 inches of unthreaded grip length — smooth shank acts as a dowel pin to resist shear loads while threads provide clamping force without binding in the hole

✓3/8-16 UNC COARSE THREAD: 0.375" diameter with 16 threads per inch offers fast assembly, excellent performance in tapped holes, and superior resistance to stripping compared to fine thread in most applications

⚙️ Specifications

Material

Alloy Steel

Thread Size

3/8"-16

Exterior Finish

Yellow Zinc

Head Style

Hex

Fastener Type

Hexagon Bolt

Brand

Ecom Fasteners

Thread Style

Right Hand

Size

3/8-16 x 4 inch

Head Type

Hex

Manufacturer

Ecom Fasteners

Item Weight

7 pounds

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3/8"-16 x 5-1/2" Hex Cap Screws, Grade 8 Alloy Steel, Zinc Yellow, 175 Pack | Partially Threaded. 1" thread length. Hex head with washer face. ASME B18.2.1. Hex bolts.

3/8"-16 x 5-1/2" Hex Cap Screws, Grade 8 Alloy Steel, Zinc Yellow, 175 Pack | Partially Threaded. 1" thread length. Hex head with washer face. ASME B18.2.1. Hex bolts.

3/8"-16 x 1-1/4" Hex Cap Screws, Grade 8 Alloy Steel, Zinc Yellow, 100 Pack | Fully Threaded. Hex head with washer face. ASME B18.2.1. High strength hex bolts for automotive and structural use.

3/8"-16 x 1-1/4" Hex Cap Screws, Grade 8 Alloy Steel, Zinc Yellow, 100 Pack | Fully Threaded. Hex head with washer face. ASME B18.2.1. High strength hex bolts for automotive and structural use.

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$91.99