Best 360mm Radiator Mounting Screws Kit for PC Builds

Finding the best 360mm radiator mounting screws kit starts with matching thread size, screw length, and mounting configuration—not simply choosing the largest assortment. A typical three-fan radiator requires twelve fan-mounting screws, but the wrong hardware can strip threads or puncture coolant channels. This guide compares six thread-specific kit options and explains how to install them safely.

Quick Verdict

Best for M3 Radiators: Singularity Computers Radiator Fastener Kit — M3.

Best for M4 Radiators: Singularity Computers Radiator Fastener Kit — M4.

Best for UNC 6-32 Radiators: Singularity Computers Radiator Fastener Kit — 6-32.

The six recommendations below are distinct purchasing configurations of two product families, not six unrelated manufacturers’ kits. That distinction matters because the correct thread standard is more important than cosmetic differences or brand variety.

Quick Comparison Table

The Phanteks screw sets are supplied with relevant T30 three-fan packages; they are not established here as separately purchasable standalone kits. Their inclusion is useful for checking available hardware, not for implying that an independent replacement kit is sold.

How We Selected the Mounting Hardware

We prioritized identifiable screw assortments with documented thread dimensions and relevant radiator applications.

Because mounting errors can damage liquid-cooling hardware, compatibility was weighted more heavily than convenience or appearance.

We also distinguished full kits from screws supplied with fans. An accessory packaged with another product cannot automatically be recommended as an independently available replacement.

Detailed Product Recommendations

1. Singularity Computers M3 Radiator Fastener Kit — Best M3 Assortment

Best For: Builders using a radiator that specifies metric M3 mounting threads.

Why We Picked It: The assortment includes three useful lengths, twelve screws of each length, and twelve washers.

Key Specifications

• Thread: M3

• Short screws: 12 × 8mm

• Medium screws: 12 × 30mm

• Long screws: 12 × 35mm

• Washers: 12

• Material: Stainless steel

Features and Practical Use

The M3 set provides several mounting options in one package, making it convenient for a radiator installation that requires different screw lengths for fan attachment and chassis mounting.

The twelve-screw quantity is particularly relevant to 360mm radiators because three 120mm fans ordinarily require four mounting screws each.

However, the kit should not be treated as universal even within the M3 category. The appropriate length depends on fan thickness, case-panel thickness, washer arrangement, and the radiator’s permissible thread engagement.

Pros: Three lengths, twelve screws per size, stainless steel construction.

Cons: Only suitable for M3 threads; 35mm screws can be unsafe in an incompatible installation.

Buy If: Your radiator specifies M3 hardware and the documented lengths match your mounting requirements.

Skip If: Your radiator uses M4 or UNC 6-32 threads.

2. Singularity Computers M4 Radiator Fastener Kit — Best M4 Assortment

Best For: Radiators with confirmed M4 mounting holes.

Why We Picked It: It provides the same three-length approach as the M3 version while using the correct M4 thread standard.

Key Specifications

• Thread: M4

• Screw lengths: 8mm, 30mm, 35mm

• Quantity: Twelve of each length

• Washers: Twelve

• Material: Stainless steel

Features and Practical Use

M4 is used by certain radiator product lines and should not be confused with M3 simply because both are metric threads.

The M4 assortment supports different installation arrangements where the screw length has been correctly determined.

For example, shorter screws may be appropriate for direct radiator-to-bracket mounting, while longer screws can pass through fan frames.

Nevertheless, a 35mm screw used with a 25mm fan does not necessarily have a safe insertion depth. The radiator’s own mounting design determines whether that configuration is acceptable.

Pros: Multiple lengths, matching washers, useful twelve-piece quantities.

Cons: Incorrect for M3 and imperial threads; safe engagement must still be checked.

Buy If: Your radiator manufacturer specifies M4 threads.

Skip If: You have not verified the radiator’s thread standard.

3. Singularity Computers UNC 6-32 Fastener Kit — Best Imperial-Thread Option

Best For: Radiators using UNC 6-32 mounting threads.

Why We Picked It: The kit offers several imperial screw lengths without requiring the buyer to mix incompatible metric hardware.

Key Specifications

• Thread: UNC 6-32

• Short screws: 12 × 0.375 inch

• Medium screws: 12 × 1.25 inches

• Long screws: 12 × 1.5 inches

• Washers: Twelve

• Material: Stainless steel

Features and Practical Use

UNC 6-32 threads are common in several PC hardware applications, but that does not mean an ordinary PC case screw is suitable for radiator mounting.

Screw length remains critical.

The 1.5-inch fasteners are intended for installations with sufficient material thickness between the screw head and radiator mounting point.

Using one in a conventional arrangement without proper depth calculation could damage the radiator.

Pros: Clearly identified imperial thread, three lengths, complete twelve-piece sets.

Cons: Not suitable for metric mounting holes; longer screws require careful measurement.

Buy If: Your radiator explicitly requires UNC 6-32 hardware.

Skip If: Your radiator uses M3 or M4 threads.

4. Alphacool M3x30/M3x5 Screw Kit — Best Two-Length M3 Set

Best For: Compatible Alphacool or other confirmed M3 radiator installations.

Why We Picked It: The kit combines twelve long screws and twelve short screws, addressing two common mounting situations.

Key Specifications

• Thread: M3

• Long screws: Twelve M3 × 30mm

• Short screws: Twelve M3 × 5mm

• Total: Twenty-four screws

Features and Practical Use

This arrangement is convenient for users who want one set of screws for mounting conventional fans and another set for direct attachment in the intended radiator configuration.

The 30mm length may be suitable for certain 25mm fan installations, but the screw path must be assessed before use.

For example, a thick case mounting rail or additional washer changes the screw’s effective insertion depth.

Likewise, direct contact between a long screw and an internal coolant channel can cause irreversible damage.

Pros: Two clearly specified lengths, twelve screws of each type, appropriate quantities for a three-fan setup.

Cons: M3 only; compatibility depends on radiator design.

Buy If: Your manual specifies the relevant M3 mounting arrangement.

Skip If: Your radiator uses another thread standard.

5. Phanteks T30 M4 Radiator Screws — Best Included Hardware for M4 and 30mm Fans

Best For: Users purchasing the Phanteks T30 three-fan package for a compatible M4 radiator.

Why We Picked It: Phanteks documents the supplied radiator screws as part of the T30 accessory package.

Key Specifications

• Thread: M4

• Length: 36mm

• Quantity: Twelve in the three-fan package

• Intended application: Mounting included 30mm T30 fans to compatible radiators

Features and Practical Use

The longer 36mm screw reflects the T30’s thicker 30mm fan frame.

Using the supplied hardware can avoid the mistake of attempting to install thicker fans with ordinary 25mm-fan screws.

However, supplied screws are not guaranteed to be suitable for every radiator. Maximum insertion depth, mounting-rail thickness, and radiator construction still need verification.

Pros: Provided for a specific 30mm fan configuration, twelve-piece quantity, documented M4 specification.

Cons: Bundled accessory rather than verified standalone retail kit; not universally compatible.

Buy If: You are installing a T30 three-pack on an appropriate M4 radiator.

Skip If: You need an independently purchasable replacement screw kit.

6. Phanteks T30 UNC 6-32 Radiator Screws — Best Included Imperial Hardware

Best For: T30 installations involving a compatible UNC 6-32 radiator.

Why We Picked It: Phanteks provides the imperial-thread alternative alongside the M4 screws in its T30 package.

Key Specifications

• Thread: UNC 6-32

• Length: 36mm

• Quantity: Twelve in the three-fan package

• Intended fan thickness: 30mm T30 frame

Features and Practical Use

This accessory demonstrates an important installation principle: radiator mounting hardware must account for both thread standard and fan thickness.

The presence of 36mm screws does not make them safe for all 6-32 radiators.

Some radiators permit less thread penetration than others, while case mounting structures can change the total distance the screw must travel.

Pros: Included with the appropriate fan package, known thread specification, correct quantity for three fans.

Cons: Not verified as a separately sold kit; depth must be checked.

Buy If: Your T30 radiator installation calls for 6-32 hardware at this length.

Skip If: Your existing fans are 25mm thick and your radiator documentation specifies shorter screws.

Buying Guide: Choosing Radiator Mounting Screws Safely

Match Thread Diameter and Pitch

Radiator mounting holes may use M3, M4, or UNC 6-32 threads.

These standards cannot be used interchangeably.

A screw may enter a mounting hole for a short distance while still having an incorrect pitch. Forcing it farther can strip the radiator threads.

Whenever possible, identify the thread through manufacturer documentation instead of trial and error.

Understand Screw Length

The correct screw length depends on several dimensions:

• Fan thickness

• Case-panel thickness

• Washer thickness

• Mounting-bracket thickness

• Permitted insertion depth

The required screw length is determined by the total material stack and allowed thread engagement.

If a radiator manufacturer provides specific hardware requirements, those instructions take priority over general calculations.

Determine the Quantity Required

A 360mm radiator typically supports three 120mm fans on each side.

A conventional single-side arrangement generally requires twelve fan screws.

A push-pull configuration can require twenty-four fan screws, depending on the radiator and attachment method.

Additional case mounting hardware may be required.

Inspect the Screw Head

Screw heads influence tool access and mounting clearance.

A bulky screw head can interfere with a recessed bracket or narrow case rail.

Before purchasing, confirm whether the intended hardware uses button-head, countersunk, or another appropriate head design.

Avoid Overtightening

Mounting screws should hold the radiator securely without deforming the fan frame or damaging threaded inserts.

Overtightening can damage soft materials, strip threads, or create unnecessary mechanical stress.

Use the radiator manufacturer’s recommended tightening procedure.

Never Use Length as a Substitute for Compatibility

A longer screw is not automatically stronger or safer.

The main danger is excessive penetration into the radiator.

If the screw contacts an internal coolant channel, it may puncture the tube and cause leakage.

Always stop when resistance feels abnormal.

Frequently Asked Questions

Are all 360mm radiator screws the same?

No. Screw threads, lengths, heads, and safe insertion depths differ among radiator models.

How many screws are required to mount three 120mm fans?

Normally twelve, with four mounting positions per fan.

Can I use ordinary PC case screws on a radiator?

Only if the exact thread, length, and head geometry match the radiator manufacturer’s specifications.

Can I use 35mm screws with 25mm fans?

Only where the complete mounting arrangement and radiator’s permitted engagement depth make that length safe.

What happens if radiator screws are too long?

They may damage internal coolant channels, causing leakage and permanent radiator damage.

Conclusion

For buyers searching for the best 360mm radiator mounting screws kit, the Singularity Computers M3, M4, and UNC 6-32 configurations provide useful multi-length assortments. The Alphacool M3 kit is another practical choice for compatible installations. Phanteks T30 packages include relevant thicker-fan mounting hardware, but those bundled screws should not be mistaken for standalone retail kits. Always verify the thread standard and safe screw depth before installation.