Value Collection A998004 External Snap Ring 8mm 420 Ss 5 Pack

Product Description

The VALUE COLLECTION A998004 is an external snap retaining ring engineered to secure components onto shafts in assemblies where axial retention is required. Manufactured from 420 stainless steel with a phosphate finish, this ring is designed for use on shafts with an 8 mm diameter and seats into a groove measuring 8.41 mm in diameter. The ring has a free diameter of 8.71 mm and a ring thickness of 0.79 mm, allowing it to snap into the groove and hold position under load. This part ships in a package quantity of 5 and conforms to DIN 472 standards. Machinists, maintenance technicians, and industrial assemblers routinely specify this type of fastener in precision mechanical assemblies.

This external snap retaining ring is suited for metric shaft assemblies across a range of industrial and mechanical applications, including motors, gearboxes, pumps, and general equipment assemblies. The DIN 472 standard designation makes it a direct fit for European-dimensioned components and equipment designed to metric fastener specifications. The phosphate finish provides a base-level surface treatment appropriate for controlled-environment service. The 5-piece package quantity is appropriate for service technicians stocking bench inventory or performing multiple repairs in a single service call.

Key Features

• Conforms to DIN 472 fastener standard for metric snap ring applications
• 420 stainless steel construction for corrosion resistance in mechanical service environments
• Phosphate finish surface treatment applied over stainless base material
• Groove width of 0.89 mm and groove depth of 0.20 mm for precise seating
• Ring thickness of 0.79 mm for consistent axial load retention
• Sold in a 5-piece package to support bench stock and multi-unit repairs

Compatibility

Designed for use on 8 mm diameter shafts conforming to DIN 472 groove geometry specifications. Suitable as a standard metric external snap ring replacement in assemblies specifying an 8 mm nominal shaft size with the corresponding DIN 472 groove profile.

Installation Notes

External snap retaining rings require dedicated snap ring pliers sized for external rings — do not attempt installation with standard pliers, as ring distortion can compromise retention. De-energize and lock out all equipment before disassembling shafts or bearing assemblies. Inspect the groove for burrs or dimensional damage before installing the new ring, and confirm the ring is fully seated in the groove before returning the assembly to service.