Description
Overview:
These Hex Socket Head Cap Screws are high‐tensile fasteners for secure, accurate assembly in plant, machinery, and equipment. Made from Grade 12.9 alloy steel and finished in chemical black, they offer excellent strength with a neat, low‐glare appearance. The M6 x 50 mm size suits a wide range of repairs and builds in workshops, on-site fabrication, and maintenance tasks. The internal hex drive allows positive engagement with a hex key or bit for controlled tightening in tight or counterbored locations. Supplied as a Pack of 10 under MPN 903 0290 200PK, they are suitable for demanding joints where reliable clamp force is required, such as brackets, housings, guards, and fixtures on construction and garden machinery.
Key Features:
- Grade 12.9 high‐tensile steel for strong clamp loads and dependable performance under vibration and load
- Chemical black (black oxide) finish for light corrosion resistance and a clean, uniform look
- M6 x 50 mm size covers common repair and build tasks across machinery and fabrication work
- Internal hex drive for controlled torque and reduced risk of tool slip in confined spaces
- Cylindrical head profile seats neatly in counterbored holes for a tidy, compact assembly
- Precision metric threads for consistent fit with tapped holes and M6 nuts
- Supplied in a matched Pack of 10 for convenient replacements and uniform assemblies
- Suitable for use with steel, aluminium, and composites when paired with appropriate washers or threadlock
- Practical choice for indoor environments; consider zinc plated or stainless options for harsher conditions
- Reliable choice for preventative maintenance and parts standardisation in workshops and fleets
Typical Applications:
Used across construction equipment, garden machinery, fabrication jigs, machine guards, brackets, motor mounts, and gearbox or pump covers. Ideal for repairs and assembly in workshops, on-site maintenance, and OEM-style builds where a compact head and high strength are required. Suitable for counterbored joints and locations with limited clearance.
Also known as:
Allen bolts, Allen cap screws, socket head bolts, SHCS, internal hex bolts, cap‐head screws, metric socket caps, internal hex cap screws.
Product Specifications
| L&S Part No. | 903 0290 |
|---|---|
| OEM No. | 903 0290 200PK |
| Unit of Sale | Pack of 10 |
| Key Features | - Grade 12.9 alloy steel for high tensile strength - M6 x 50 mm size for versatile repair and build tasks - Internal hex drive for controlled torque in tight spaces - Chemical black finish for light corrosion resistance - Supplied in a Pack of 10 for uniform assemblies |


