ASTM F436 Hardened Structural Washer

Through-hardened circular flat washer to ASTM F436 for structural connections with A325 and A490 bolts, so the washer does not yield under the bolt head or nut during pre-tensioning.

Standard: ASTM F436
Equivalents: F436M (metric), DIN 6916 / EN 14399-6 (HV)
Sizes: 1/2" – 1-1/2"; M12 – M36
Grades: Through hardened
Materials: Medium carbon steel, through hardened
MOQ: 500 pcs per size (negotiable for trial orders)

Finishes

Finish	Applied	Notes
Plain	Available	For customer-side coating
Hot-dip galvanized	Available	ISO 10684 / ASTM F2329; nuts tapped oversize to suit
Zinc flake (Dacromet/Geomet type)	Available	Electrolyte-free, no hydrogen embrittlement risk
Black oxide / phosphate	Available	Indoor or oiled service

For property class 10.9 and above, choose zinc flake, or zinc-nickel with hydrogen-embrittlement relief agreed at order stage.

Applications

Steel structures
Bridges
Towers

Ordering terms

MOQ: 500 pcs per size (negotiable for trial orders)
Mixed sizes: Welcome in one order
Samples: Samples available — cost and lead time quoted per request
Lead time: 15–25 days for standard parts; finishes such as HDG or Dacromet add a few days
Payment: T/T 30% deposit, 70% before shipment
Shipping: FOB Ningbo / CIF / DDP on request
Packaging: Cartons on pallets, or private-label boxes and bags
Documents: Material certificate, coating thickness and salt-spray reports on request
Custom: Drawings, non-standard sizes, coatings, marking and private-label packaging

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ASTM F436 Hardened Structural Washer

Features

Finishes

Applications

Ordering terms

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