Original San**k 5513 020-55 Alloy Steel Torx Screw M2.0 5.5mm Length for Indexable Carbide Insert Fastening CNC Tools

The Coromant 5513 020-55 Torx Countersunk Insert Screw is an original precision fastening spare part specially developed by S Coromant for locking indexable carbide inserts on turning and milling tool holders. It adopts M2.0 metric standard thread, total length 5.5mm, internal T6 Torx drive and 60° raised countersunk head structure. Manufactured from high-strength alloy steel with anti-oxidation hardening treatment, this screw delivers stable clamping force, high tensile strength and excellent wear resistance under continuous CNC cutting loads. It is the standard matching fastener for small-size turning/milling inserts, widely used on general steel, alloy steel and stainless steel machining tool systems.

• Brand: S Coromant (Swedish world-class cutting tool manufacturer)
• Full Part Number: 5513 020-55
• Thread Specification: M2.0 standard metric thread, right-hand thread
• Total Screw Length: 5.5 mm
• Drive Type: Internal T6 Torx (Torx Plus compatible)
• Head Form: 60° raised countersunk head, low-profile flush mounting
• Base Material: High tensile quenched alloy steel
• Surface Treatment: Black anti-rust hardening finish, friction reduction
• Application Purpose: Clamping & fixing indexable carbide inserts on tool holders
• Matching Tools: T6 Torx screwdriver / Torx bit wrench
• Industry Standard: ISO & S internal 5513 series fastening specification

• Small-size indexable turning inserts (CCMT, DCMT, SCMT mini series)
• Miniature shoulder milling inserts, small face mill inserts
• S , Pramet, ZCCCT and other universal standard small tool holders

Carbon steel, alloy structural steel, stainless steel, pre-hardened mold steel, cast iron (general CNC machining mass production)

1. Fastening small-size carbide indexable inserts on CNC turning tool holders
2. Locking miniature milling inserts for tiny part precision machining
3. Mold, automotive miniature fitting, electronic component turning & milling
4. Batch automatic lathe, machining center long-term continuous cutting production
5. Precision machining requiring consistent stable insert clamping without loosening

1. High-strength quenched alloy steel substrate: High tensile and shear strength, resists screw breakage under tightening torque
2. T6 Torx internal drive design: Uniform stress distribution, prevents drive slot slipping during repeated disassembly
3. 60° low countersunk head: Flush mounting without interfering chip flow, avoids chip scratching insert surface
4. Standard M2.0×5.5 dimension: Universal interchangeable for most mini indexable insert systems
5. Black anti-corrosion surface treatment: Resists coolant erosion, extends service life under wet cutting conditions
6. Strict Swedish precision thread grinding: Stable thread fit, anti-loosening during high-speed cutting vibration