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Fastenio — Precision Fastening Solutions
M8 Carriage Bolts 18-8 Stainless Steel

M8 Carriage Bolts 18-8 Stainless Steel

SKU: FN-BLT-CB-M8-SS18· 12 lengths

Bulk-Only Item

Minimum order quantity: 100 pieces per pack. Ships 7 business days after your cart reaches the $500 bulk minimum — bulk-only and regularly-stocked items both count. Learn more →

$19.39/ 100 pcs

$0.19/ea

pack

1 pack × 100 = 100 pieces

In Stock
FN-BLT-CB-M8-25MM-SS18-PT-SQ-D603-PL
Free US shipping 30-day returns Ships ~7 business days

M8 round head square neck carriage bolts in 18-8 Stainless Steel to DIN 603. A carriage bolt has a smooth domed head with no drive and a square shoulder beneath it. Driven into a round hole in timber or a matching square hole in steel, the shoulder bites and holds the bolt against rotation so the assembly can be tightened from the nut alone, with nothing gripping the head. The low dome leaves no protruding drive to snag, collect water or be tampered with — standard in deck and fence framing, timber structures, trailer beds, playground and marine fit-out. Supplied fully threaded in 16mm, 20mm, 55mm, 60mm, 65mm, 80mm and 90mm. The 25mm, 30mm, 35mm, 40mm and 50mm lengths are partially threaded with the DIN 603 minimum thread length of 22mm. 12 lengths (16mm to 90mm). Sold in bulk multiples.

Material

Stainless Steel

Finish

Plain / Natural

Grade

18-8 (A2-70)

Size

M8

Head Style

round

Standard

DIN 603

Guides: 18-8 stainless steel vs. other grades

Technical Specifications

Thread SizeM8
StandardDIN 603
Head StyleRound (Dome)
Neck StyleSquare
Head Diameter20.65mm
Head Height4.88mm
Square Width8.58mm
Material Grade18-8 (A2)
FinishPlain