Comp Cams Replacement Adjusting Nut Set for Magnum Roller-Tip Rockers 3/8" Stud — Precision-Threaded, US-Made

COMP Cams 1400N-16 Replacement Adjusting Nut Set provides durable, precision-threaded replacement nuts designed specifically for Magnum roller-tip rocker arms with a 3/8" stud.

If you’re rebuilding or refreshing cylinder heads fitted with COMP Cams Magnum roller-tip rocker arms, the 1400N-16 adjusting nut set gives you the exact-fit hardware to restore reliable valve adjustment and maintain proper valvetrain geometry. These replacement nuts match the original specifications, come from a trusted US manufacturer, and are intended as a direct-service part when worn or damaged nuts compromise adjustment accuracy.

How do these nuts affect valve adjustment accuracy?

Proper adjusting nuts are critical to holding rocker clearance and keeping lash consistent under operating loads. Worn or rounded nuts can allow the setting to drift, leading to noisy operation or inconsistent lift. The COMP Cams 1400N-16 parts are machined to the same thread pitch and dimensions as OEM-style nuts for a secure, repeatable fit.

• Fits Magnum roller-tip rocker arms with 3/8" stud spacing
• Precision-threaded to resist loosening and ensure repeatable settings
• Restores proper clamping force for stable valve lash

Will these fit my engine and rocker setup?

These nuts are made for COMP Cams Magnum series roller-tip rockers using a 3/8" stud; they’re a universal replacement where that spec matches. They are not a universal thread for all rocker brands—verify stud diameter and thread pitch before ordering. If your rockers are stamped Magnum and show a 3/8" stud, this set is a direct replacement option.

• Designed specifically for COMP Cams Magnum roller-tip rockers
• Confirm 3/8" stud diameter and matching thread pitch before installation
• Ideal for rebuilds, part swaps, or replacing worn nuts

What are the build and packaging details I should know?

These replacement nuts are manufactured in the United States and packaged compactly for easy storage and shipping. The product ships in a small, lightweight package under half a pound and follows COMP Cams quality standards. That makes them convenient to keep as spare parts in a race trailer or home shop.

• Country of origin: United States
• Package dimensions approximately 1.016 x 8.89 x 9.144 cm
• Package weight roughly 0.45 pounds for easy handling and inventory

How should I use and maintain these adjusting nuts?

Install the nuts using the recommended torque and valve-setting procedure from your rocker or engine manual to avoid over-tightening. Inspect threads for damage and replace any nut that shows galling, wear, or stripped threads. Periodic re-checks of valve lash after initial break-in are good practice to ensure settings remain stable.

• Follow COMP Cams or engine builder torque/adjustment specs
• Replace if threads show wear, galling, or rounding
• Re-check valve lash after initial run-in and periodically thereafter

Who is this for: Engine builders, race teams, and DIY enthusiasts who run COMP Cams Magnum roller-tip rockers with 3/8" studs and need reliable replacement hardware. If you’re performing a cylinder-head refresh, swapping rockers, or keeping spares for trackside repairs, the 1400N-16 adjusting nut set offers a straightforward, OEM-matching solution that helps maintain precise valve adjustment and dependable valvetrain performance.