Package contents: 5 x Shoulder Mandrel Key features - Material and finish: 40 Cr alloy steel with black oxide surface for durability and wear resistance; colour is silver tone with black accents - Hardness: HCR40-44 for strong, long-lasting performance - Head and drive: Socket Cap head with Hex Socket drive for secure seating and easy tool engagement - Construction details: Thickness 12.9 Grade A; Thread Cover: Partial Thread - Shoulder geometry: Shoulder diameter 10 mm; Shoulder length 40 mm - Thread specification: Size M8 with thread length 13 mm Why you need this - Provides precise shoulder locating and alignment in assemblies, improving repeatability and reducing misalignment during fastening - Durable steel construction and black oxide finish withstands regular use in workshops or production environments - Compatible with M8 threaded components and hex socket cap fasteners, enabling reliable engagement and positioning Practical use scenarios - Fixture and jig setup: use as a locating shoulder to position parts with an M8 thread, ensuring a consistent 10 mm shoulder and 40 mm length - Prototyping and repair work: simulate bolt-on joints and verify clearances before final assembly - Machining and assembly workflows: act as a reliable mandrel in setups requiring precise shoulder support for sequential operations Note: 5 pieces in the package; per-piece weight is 186 g.