Industrial Fastener · Washers Series
Structural Washer (F436)
ASTM F436 hardened structural washers are designed for use with A325 and A490 high-strength structural bolts. The hardened steel resists the high preloads and prevents the washer from being crushed or impressed by the bolt head/nut.
Product Overview
Structural Washer (F436) sourcing essentials
ASTM F436 hardened structural washers are designed for use with A325 and A490 high-strength structural bolts. The hardened steel resists the high preloads and prevents the washer from being crushed or impressed by the bolt head/nut.
ASTM F436 (Type 1 plain, Type 3 weathering)
Material per requirement
ASTM F436 hardened structural washers are designed for use with A325 and A490 high-strength structural bolts. The hardened steel resists the high...
Inspection records, lot labels, certificate options, and destination-ready packing.
Technical Data
Specification range
Final dimensions, mechanical properties, finish, and packing are confirmed against the RFQ and applicable standard.
| Standard | ASTM F436 (Type 1 plain, Type 3 weathering) |
|---|---|
| Hardness | 38-45 HRC |
| Size Range | 1/2" – 1-1/2" |
| Surface Finish | Plain, HDG |
| Documentation | Mill Test Certificate per heat lot |
Common surface finishes
Select an option to review its sourcing note. Exact coating system, thickness, and corrosion requirement are confirmed with the order.
Quality Control
Checked before consolidation and export
Each order is matched to the specified standard and verified at practical control points before shipment.
RFQ confirmation
Standard, size, grade, pitch, finish, certificates, packing, and destination are locked before production.
Lot verification
Critical dimensions, thread fit, markings, finish appearance, and packing labels are sampled and recorded.
Shipment approval
Photos and required reports are organized before consolidated loading and export documentation.
Buyer Questions
Frequently asked questions
Are F436 washers required with A325 bolts?
Per AISC and most structural specifications, F436 washers are required at slip-critical connections, oversized or slotted holes, and other specific conditions. Even where not strictly required, they are widely specified for any A325/A490 connection because of their reliability.
Ready to quote Structural Washer (F436)?
Send the standard, size, grade, finish, quantity, packing requirement, and destination. Availability and lead time are confirmed with the inquiry.