Stainless Steel Cap Nut 316 (A4)
A4 (AISI 316) cap nut for protecting exposed thread ends in metric assemblies exposed to more corrosive environments. Sold per piece.
Choose a size below and add it to your quote.
Applications & Selection Guide
A4 (AISI 316) hexagon cap (dome) nuts to DIN 1587 for covered, finished thread ends in corrosive environments.
Use A4 cap nuts on coastal balustrades, marine fittings, pool surrounds, and exterior architectural fixings where both appearance and chloride resistance matter. Match with A4 bolts or rod and verify thread protrusion fits within the dome. Available metric sizes are in the table above.
Sold per piece with a 50–100 piece minimum order depending on size. Include sizes and quantities in your quote request.
Technical guides
304 vs 316 stainless steel: composition, strength, corrosion resistance and when to use each
How 304 (1.4301) and 316 (1.4401/1.4404) stainless steel differ in composition, PREN, strength and chloride resistance, what the L grades and A2/A4 fasteners mean, and which grade to choose.
Read the guide →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
A4-70 / AISI 316
Manufacturing Standard
DIN 1587
Material Type
Stainless Steel
Category
Cap Nut 316
Ready to request pricing?
Add sizes to your quote cart, or paste your full list — Excel, CSV, or plain text.