304 Stainless Torx Security Screws M2–M8 Pan Head Machine Bolt

Q: What special tool do I need to drive these Torx security screws?

These tamper-resistant screws require a Torx security bit (also called a pin-in Torx or star-with-pin bit) that has a small hole in the center to accommodate the security pin. Standard Torx bits without the center hole will not fit. Security Torx bit sets are widely available at hardware stores and online.

Q: Are 304 stainless steel screws suitable for outdoor use?

Yes. 304 stainless steel provides strong resistance to rust and oxidation, making these machine screws well-suited for outdoor and humid environments. For highly corrosive or marine environments, 316 stainless steel is generally recommended, but 304 performs excellently in most standard outdoor conditions.

Q: How do I choose the correct size — what does M3 x 10 mean?

The "M" designation indicates the metric thread diameter in millimetres (e.g., M3 = 3 mm diameter), and the number after the "x" indicates the thread length in millimetres (e.g., 10 = 10 mm long). Always measure the diameter of the hole you are fastening into and the depth of thread engagement needed before selecting your size.

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JARBLUE 304 Stainless Steel Torx Pan Head Security Screws — Anti-Theft, Tamper-Resistant Fasteners

Upgrade your builds with JARBLUE's 304 (A2-70) stainless steel Torx pan head machine screws. Featuring a six-lobe (Torx) drive with a tamper-resistant pin, these screws can't be removed with ordinary tools — making them ideal for securing enclosures, public fixtures, electronics, signage, and any application where unauthorized access is a concern. Available in a wide metric size range from M2 to M12 and thread lengths from 3 mm to 100 mm, you'll find the exact size you need for virtually any project.

Made in Mainland China.

Key Features

Premium 304 (A2-70) Stainless Steel — Excellent corrosion resistance, strength, and durability for both indoor and outdoor use.
Six-Lobe (Torx) Pin Drive — The central security pin prevents removal with standard Torx or flat-head drivers, deterring tampering and unauthorized disassembly.
Pan Head Style — Low-profile, wide bearing surface distributes clamping force evenly and sits flush against most surfaces.
Wide Size Range — Metric thread diameters M2, M2.5, M3, M4, M5, M6, M8, M10, M12; thread lengths 3 mm–100 mm.
Machine Screw Thread — Precise metric thread pitch for consistent, secure engagement in tapped holes or with matching nuts.
50–99 Piece Packs — Convenient multi-packs to keep your workshop stocked.

Technical Specifications

Material	304 Stainless Steel (A2-70)
Drive Style	Six-Lobe Torx with Security Pin
Head Style	Pan Head
Screw Type	Machine Screw
Thread Diameters	M2 · M2.5 · M3 · M4 · M5 · M6 · M8 · M10 · M12
Thread Pitch	0.4 mm (M2) / 0.45 mm (M2.5) / 0.5 mm (M3) / 0.7 mm (M4) / 0.8 mm (M5) / 1 mm (M6) / 1.25 mm (M8) / 1.5 mm (M10) / 1.75 mm (M12)
Thread Length	3 mm – 100 mm
Package Quantity	50–99 pcs
Brand	JARBLUE
Origin	Mainland China

Common Applications

Electronic enclosures and device housings
Public infrastructure, signage, and display mounts
Automotive trim and panel fastening
Security cabinets and locked equipment
DIY projects requiring tamper-resistant fastening

Frequently Asked Questions

Q: What special tool do I need to drive these Torx security screws?

A: These tamper-resistant screws require a Torx security bit (also called a pin-in Torx or star-with-pin bit) that has a small hole in the center to accommodate the security pin. Standard Torx bits without the center hole will not fit. Security Torx bit sets are widely available at hardware stores and online.

Q: Are 304 stainless steel screws suitable for outdoor use?

A: Yes. 304 stainless steel provides strong resistance to rust and oxidation, making these machine screws well-suited for outdoor and humid environments. For highly corrosive or marine environments, 316 stainless steel is generally recommended, but 304 performs excellently in most standard outdoor conditions.

Q: How do I choose the correct size — what does M3 x 10 mean?

A: The "M" designation indicates the metric thread diameter in millimetres (e.g., M3 = 3 mm diameter), and the number after the "x" indicates the thread length in millimetres (e.g., 10 = 10 mm long). Always measure the diameter of the hole you are fastening into and the depth of thread engagement needed before selecting your size.

Q: Can these screws be used in tapped holes without a nut?

A: Absolutely. As machine screws, these fasteners are designed to thread into pre-tapped holes with matching metric thread pitch, or can be used with a corresponding metric nut and washer if threading through a through-hole. Ensure the tapped hole pitch matches the screw's specified pitch for a secure fit.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.

We prioritize quality in selecting the materials for our items, choosing premium fabrics and finishings that ensure durability, comfort, and timeless appeal.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.