SAE J429 Grade 2 Bolts

Documents

Shipments are backed by Mill Test Certificate (MTC), Dimensional Report, Salt Spray Test Report on request, with full batch traceability from raw material to finished product. Quality management follows the owner-confirmed compliance list: ISO 9001:2015, RoHS, REACH. Exact document sets are confirmed on the order.

Quotation

• The fastener family (SAE J429 Grade 2 Bolts) plus the standard designation from your drawing — DIN / ISO / JIS / ASTM / ANSI, or a drawing for custom parts.
• Size (diameter and length), thread type (metric or inch), property class or grade, and coating or finish.
• Quantity per size and your target delivery date.
• Destination country, and any required documents (for example a mill test certificate) so the quote includes them.

Sample & supply

Minimum order quantity is 1,000–10,000 pieces depending on size. Stock items run 3–7 days. High-strength and custom parts run 15–25 days. Quantities or variants outside the standard range are confirmed at quotation.

Storage & shipping

Parts are packed for export and shipped factory-direct to buyers in Europe, Asia, the Americas and the Middle East. Store fasteners dry and protected until installation, and keep coated parts in their packaging until use; specific packing and preservation requirements can be stated on the order and confirmed at quotation.

Why does Grade 2 get weaker above 3/4″?

Because the grade is not quenched and tempered: its strength comes from the carbon content of the bar, and the mechanical table reflects what unhardened low-carbon steel delivers as sections get thicker. The collected specification prints the drop explicitly — 74 ksi tensile and 55 ksi proof at 1/4″–3/4″, 60 ksi and 33 ksi over 3/4″ through 1-1/2″ — and the effect is more pronounced than in the quenched-and-tempered ASTM A449, which shows the same size-dependent behavior in milder form. If your joint needs full strength in large diameters, that is what Grade 5 or a specified ASTM grade is for; do not scale Grade 2 proof loads from the small-size table.

Can I substitute ASTM A307 when the drawing says SAE Grade 2?

The collected specification describes the SAE and ASTM families as functionally overlapping — Grade 2 ≈ A307 Grade A for general-purpose low-carbon work — and notes ASTM equivalents are generally acceptable substitutions when no specific SAE callout is mandated. The discipline is the reverse: a drawing that names A307, A449, or A354 has already made a testing and certification choice, so substitute back to SAE grades only with the engineer's concurrence. Either way, the matched nut is SAE J995 Grade 2 and the washer an F844 plain — the pair is part of how the grade keeps the joint failing in the bolt, not the nut.

What is the MOQ and lead time for this bolt grade?

The minimum order quantity is 1,000–10,000 pieces depending on size. Stock items ship in 3–7 days; high-strength and custom parts in 15–25 days. Common diameters in this grade are widely stocked; confirm the exact schedule against quantity and size mix at quotation.

What should an RFQ for this bolt grade state?

State the standard and grade (for example ISO 4017 Class 8.8 or ASTM F3125 Grade A325 Type 1), diameter and length, thread type (metric coarse or UNC/UNF), finish (plain, zinc, or hot-dip galvanized where the grade permits), required certificates such as a mill test report per EN 10204 3.1, and quantity per size — plus destination country.