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4025 Holey Star Bit Socket | ½”Drive | Tamper-Proof S2 Steel
4025 Series: ½” Drive Holey Star Bit Socket(Tamper-Proof)
- 1/2″ Drive Holey Star Bit Socket
- Douilles tournevis para tornillos
- śrubokręt nasadowy
- Steckschlüssel-Schraubendreher
- Vasos destornilladores
- مفك البراغي
- ไขควงปากแบน
- DIN3120- ISO 1174
4025 is an industrial-grade Holey Star Bit Socket specifically engineered for high-torque security applications. Utilizing a 1/2″ Square Drive interface, this tool is designed to service large Tamper-Proof Star fasteners that incorporate a central security pin. By combining a high-strength S2 Tool Steel bit with a Chrome Vanadium (Cr-V) socket body, the 4025 series provides the mechanical leverage and torsional resilience required for safety-critical assemblies in automotive, public infrastructure, and heavy machinery MRO.
| 4025 | 4025 L : mm | 4025 g | 4025-4 L : mm | 4025-4 g |  pcs |
|---|---|---|---|---|---|
| TH20 | 55 | 64 | 100 | 110 | 10 |
| TH25 | 55 | 64 | 100 | 110 | 10 |
| TH27 | 55 | 64 | 100 | 110 | 10 |
| TH30 | 55 | 64 | 100 | 110 | 10 |
| TH40 | 55 | 64 | 100 | 110 | 10 |
| TH45 | 55 | 67 | 100 | 115 | 10 |
| TH47 | 55 | 67 | 100 | 115 | 10 |
| TH50 | 55 | 67 | 100 | 115 | 10 |
| TH55 | 55 | 98 | 100 | 120 | 10 |
| TH60 | 55 | 100 | 100 | 160 | 10 |
| TH70 | 55 | 115 | 100 | 180 | 10 |
| TH80 | 70 | 195 | 100 | 260 | 10 |
Feature
Technical Architecture & Mechanical Logic
- Holey Star (TH) Security Geometry: This bit socket features a 6-lobe profile with a precision-machined central cavity. This mechanical logic allows the tool to seat fully over the security pin of tamper-resistant fasteners, ensuring 100% surface contact and preventing the “cam-out” or bit shattering common when using non-security tools.
- 1/2″ (12.7mm) Square Drive: The 1/2″ drive platform is architected for high-load environments. It allows technicians to utilize full-sized ratchets, breaker bars, and torque wrenches to overcome the high breakaway torque often found on seized security bolts in chassis or industrial frames.
- Dual-Material Performance: * Bit Insert: Manufactured from Premium S2 Tool Steel, heat-treated for a specialized “torsion zone” that absorbs shock without brittle fracturing.
- Socket Body: Forged from Chrome Vanadium (Cr-V) and high-polished for superior structural integrity and corrosion resistance.
- 60mm Structural Length: The 60mm length is optimized to provide enough clearance to bypass minor obstructions while maintaining the axial stability needed to prevent side-loading during high-torque applications.
- Comprehensive Range (TH20–TH60): As per the technical table, the 4025 series is available in: TH20, TH25, TH27, TH30, TH40, TH45, TH50, TH55, and TH60.
B2B Procurement & Workshop ROI
- Authorized Service Capability: The 4025 enables workshops to service “security-locked” components (e.g., European braking systems and industrial control panels) without damaging the specialized hardware.
- Industrial Durability: The two-piece pressed fit between the S2 bit and Cr-V body ensures the tool can withstand the heavy physical demands of commercial truck and heavy equipment repair.
- Anti-Corrosion Finish: Features a mirror-chrome finish on the socket and a manganese phosphate coating on the bit for maximum protection against oxidation and chemical exposure.
FAQ Section
- What is a “Holey Star” socket? It is a Star (Torx) bit socket with a hole in the center. It is required for Tamper-Proof screws that have a small pin in the middle of the star shape.
- What sizes are available in the 4025 series? The range covers 9 industrial sizes from TH20 up to TH60.
- Is this socket impact-rated? No. This is a Chrome Vanadium hand tool. For pneumatic use, the Hans Impact Star series should be utilized.
- Can I use this on a standard Star bolt? Yes, a Holey Star (TH) bit will work on both tamper-proof and standard Star fasteners.
