Screw SCHROFF M2.5 HALS SHAPE, black, cross/slot head, model 21101102

Screw SCHROFF M2.5 HALS SHAPE, black, cross/slot head, model 21101102 is a precision M2.5 metric fastener designed for electronics and equipment assembly. The HALS neck profile combines a reduced shank area with reliable clamping properties, while the black finish provides corrosion resistance and a discreet appearance. The combined cross (Phillips) and slotted head accepts both Phillips and flat drivers, simplifying assembly and maintenance in rack, chassis or component mounting applications.

Advantages

The HALS neck design ensures accurate positioning and steady clamping force in thin materials and confined mounting locations. Dual-drive head (cross/slot) increases compatibility with common hand and power drivers, reducing the need for multiple screw types. The black surface finish offers basic protection against oxidation and creates a low-contrast visual profile suitable for exposed panels and assemblies. The small M2.5 diameter is appropriate for precision fastening tasks where space and component density are limiting factors.

Suitable for

• Fastening printed circuit boards and small electronic modules
• Mounting components inside racks or chassis
• Assembly and repair of precision instruments and compact devices
• Situations requiring compatibility with both Phillips and flat screwdrivers

Key specifications

• Metric size: M2.5 diameter
• Neck/profile: HALS (reduced neck for controlled clamping)
• Head type: Combined cross (Phillips) and slotted head
• Surface finish: black coating
• Intended use: precision electronics and equipment assembly

How to use

Select an appropriately sized Phillips or flat screwdriver that fits the cross/slot recess without excessive play. Align the screw through the part(s) to be fastened and engage the driver in the head recess. Apply steady, controlled torque to draw parts together; avoid over-tightening to prevent damage to threads or mating components. When using power drivers, set torque limits or use low-speed settings to maintain control. For repeatable assembly, verify seating and clamp force visually or with a torque-controlled tool where required.

Usage recommendations

For best results in electronic assemblies, use this M2.5 HALS screw with appropriately sized threaded inserts or nuts designed for small-diameter screws, and ensure mating materials can accept the reduced neck profile without deformation. Store screws in a dry environment to preserve the black finish and prevent surface corrosion.