Available Sizes & Finishes
12 sizes available
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Thickness (mm)
Applications & Selection Guide
ISO 898-2 property class 8 hexagon cap (dome / acorn) nuts to DIN 1587. Closed domed crown covers the bolt end on class 8.8 joints that must stay snag-free — railings, guards, and visible machine fixings. Metric coarse, listed M4–M24. The dome limits how much thread the nut can accept.
Specify where an 8.8 joint still needs a closed thread end — industrial railings, equipment covers, and architectural steel with structural fasteners. Match class to the bolt. Confirm thread protrusion fits the dome; over-long bolts will bottom out before clamp is reached.
Request a quote with sizes, quantities, surface finish, and delivery country. Matching 8.8 bolts can be included in the same cart.
Technical guides
Bolt grades and sizes: 8.8, 10.9, 12.9, A2 and A4, and metric hex bolt dimensions
What the property classes 4.8, 8.8, 10.9 and 12.9 and stainless A2-70 and A4-70 mean, minimum strength and tensile loads, metric thread pitch and hex head sizes, DIN 933 vs DIN 931, and which nut goes with which bolt.
Read the guide →Nut and washer types compared: hex, lock, flange, castle, coupling, cap and HV nuts, flat, spring and structural washers, with their standards
How hex, thin, nylon-insert and all-metal lock, flange, castle, coupling, cap, wing and HV nuts differ, which nut class goes with which bolt, and when to use DIN 125, DIN 127, DIN 7989 and DIN 6916 washers.
Read the guide →Product Information
Material Grade
ISO 898-2 class 8
Manufacturing Standard
DIN 1587
Material Type
Steel
Category
Cap Nut
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