✨ Get 20% OFF your first order. ✨

Your Shopping Bag

Your bag is empty

Subtotal $0.00
Shipping Calculated at checkout
Continue Shopping

Trending Bulk 5/16"-24 Hex Flange Bolts, Grade 8 Black Phosphate / Oil Best Choice [Kj08fOqP]

$44.99 $143.99 -69%

Bulk 5/16"-24 Hex Flange Bolts: Durability and Strength Welcome to our bulk supply of 5/16"-24 Hex Flange Bolts, designed to meet the highest standards of industrial, automotive, and construction projects. These Grade 8 black phosphate and oil finish

Secure Shopping

100% Safe Guarantee

Free Shipping

On orders over $30

Money-Back

30-Day Guarantee

Bulk 5/16"-24 Hex Flange Bolts: Durability and Strength

Welcome to our bulk supply of 5/16"-24 Hex Flange Bolts, designed to meet the highest standards of industrial, automotive, and construction projects. These Grade 8 black phosphate and oil finish bolts from Monster Bolts are engineered for superior strength and durability. Crafted from premium Grade 8 steel, they offer excellent corrosion resistance and a sleek, professional appearance. The integrated hex flange design ensures optimal load distribution and minimizes the risk of loosening, making them a reliable choice for heavy-duty applications.

Product Specifications and Benefits

Our US/Inch Hex Flange Screws, Grade 8 – 5/16-24, come with specific features that set them apart. They have a diameter of 5/16" or 0.3125", a thread size of 24 TPI, and a 3/8" Hex Drive for easy installation. The built-in washer on the flange design not only provides added strength but also reduces the risk of damage to the threads. Made from Grade 8 High Tensile Strength Steel and finished with a black phosphate and oil coating, these bolts meet the stringent ASTM A307 standards. This ensures not only compliance but also exceptional performance in various environments.

Applications and Scenarios

Hex flange bolts like these are versatile and widely used in numerous scenarios. Whether you are working on a construction project, a repair in the automotive industry, or an industrial setup, these bolts offer the strength and durability needed to withstand rigorous conditions. Their high tensile strength and corrosion resistance make them ideal for outdoor and indoor applications alike. By choosing our bulk supply of 5/16"-24 Hex Flange Bolts, you ensure a cost-effective and efficient solution for your fastening needs. These bolts are the perfect choice for any professional looking to achieve superior results in their projects.

What Our Customers Say

December 31, 2025

Absolutely no complaints!

It’s a very well-engineered, and a very solid item.

- Rheinallt A..

December 31, 2025

Absolutely no complaints!

This is a very good product and its entire whole purchase.

- Lowri D..

December 31, 2025

Absolutely no complaints!

This has made a significant and positive impact.

- Zebadiah Z..

Write a Review

You Might Also Like

Discover more great products from our collection.

338-3550 (OPE)HARNESS-GENSET

338-3550 (OPE)HARNESS-GENSET

(283)
$27.99 $89.99 -69%
ELEFANTE - PELUCHE

ELEFANTE - PELUCHE

(192)
$29.99 $95.99 -69%
Raging Bull 2

Raging Bull 2

(435)
$20.99 $67.99 -69%
DSCHINNI JUNIOR

DSCHINNI JUNIOR

(958)
$27.99 $89.99 -69%
gg loafer mocha calfskin

gg loafer mocha calfskin

(728)
$25.99 $83.99 -69%
3037/S KB7 FQ

3037/S KB7 FQ

(161)
$33.99 $108.99 -69%

Copyright 2025 © mappa-mercia.org

VISA
PayPal
Stripe
Mastercard
CASH ON DELIVERY