Mardarth 24-Pack 7/16-20 Chrome Lug Nuts 3/4" Hex 1.38" Length 60° Conical Seat for Classic Chevy & GMC

Mardarth 24-piece set of 7/16-20 chrome lug nuts with a 60° conical seat and 3/4" hex, built to replace factory lug nuts on many Chevy and GMC models from the 1970s and 1980s.

If you’re restoring or maintaining classic Chevy or GMC vehicles — from Blazers and K10s to Jimmys and early Camaros — these lug nuts are sized and finished to match original wheel fitments while offering a one-piece, closed-end design for improved corrosion resistance. The kit includes 24 lug nuts with 7/16-20 threads, a 3/4" (19mm) hex head, 1.38" (35mm) length and a 60° conical seat, finished in bright chrome to preserve appearance and durability.

Which vehicles will these lug nuts fit?

These lug nuts are specified for a range of Chevrolet and GMC passenger and light-truck models made mainly in the 1970s and 1980s. The fit list covers popular trucks and cars that originally used 7/16-20 conical-seat hardware, so they’re suitable for common restorations and maintenance jobs.

• Chevy models: Blazer (1971–1989), Camaro (1977–1981), El Camino (1976–1979), K10 pickups/suburbans, K5 Blazer and several mid‑70s sedans.
• GMC models: Jimmy series (1971–1989), K15/K1500 pickups and suburbans (1971–1986), Caballero and V1500 1987 models.
• Confirm vehicle OEM lug thread and seat type before purchase to ensure proper fit.

How do these lug nuts compare to original two-piece or capped designs?

Unlike two-piece or capped styles that can trap moisture and corrode at the seam, the Mardarth lug nuts are one-piece and closed-end to minimize water ingress. This construction improves longevity and makes wheel removal and cleaning simpler over time.

• One-piece solid body reduces rust points compared with capped nuts.
• Closed end design helps keep wheel studs and threads cleaner.
• Chrome finish resists surface corrosion and preserves appearance.

What are the exact specifications and measurements?

These lug nuts are manufactured to match the common classic GM wheel standards: 7/16-20 threads with a 60° conical seat, 3/4" hex head and 1.38" overall length. Dimensions are provided to help you verify compatibility with wheels and torque tools.

• Quantity: 24 pieces — enough for six wheels on many dual‑wheel or spare configurations.
• Thread: 7/16-20; Hex: 3/4" (19mm); Length: 1.38" (35mm); Width: 0.87" (22mm).
• 60° conical seating angle, chrome finish, closed-end style.

Do these lug nuts hold up in corrosive environments and what support is offered?

The nuts undergo salt spray testing and are designed to perform better than common two-piece types in moisture-prone conditions. Mardarth backs the set with a one-year guarantee and a customer support channel for fitment or quality concerns.

• Tested by 72 hours of salt spray to evaluate corrosion resistance.
• One-year guarantee with responsive after-sales support for replacements or issues.
• Chrome finish plus closed-end design for added protection of studs and threads.

Who is this for: These lug nuts are intended for car and truck owners, restorers, mechanics and parts suppliers working on classic Chevy and GMC models that require 7/16-20 conical-seat hardware. If you’re restoring an early Blazer, K-series pickup, Jimmy, or matching original-style fasteners on vintage muscle cars and sedans, this 24-piece Mardarth set offers a durable, serviceable replacement option that maintains period-correct appearance while improving corrosion resistance.