ASME B18.2.6M Heavy Hex Bolts (Metric)

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 (ASME B18.2.6M Heavy Hex Bolts (Metric)) 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.

How do I use the LG/LS grip table when ordering a length?

Pick the nominal length L from your stack-up, then read what the table says you actually get. For a given L and size, LG max/min is the unthreaded grip that will sit inside the clamped joint, and LS is the threaded shank that remains for nut engagement — e.g. at M12, L40 tabulates LG 15/9.8, meaning somewhere between about 10 and 15 mm of that bolt is unthreaded body. The table is how you check the two classic ordering errors before they happen: a grip too long for the joint (the bolt bottoms on the unthreaded body and never clamps) and a shank too short (the nut runs out of thread before the joint is tight). The "..." cells mean the length is not offered in that size — the collected chart prints them, and we carry them rather than interpolating. Where your grip falls between offered lengths, that is an RFQ line, not a guess.

What are the LT and Y columns, and why does FIM matter?

LT is the reference thread length — how much usable thread the standard intends the size to carry — and Y is the transition thread, the run of incomplete threads between full thread and shank. The source itself labels both "Ref." and its footnote language treats them as calculation values: they tell you what the design assumed, they are not go/no-go inspection dimensions. FIM (full indicator movement) is different — it is the max runout of the bearing surface, 0.4 mm at M12 rising to 1.0 at M36, and it is a genuine acceptance check: a head seated out-of-true tilts the load into the fillet and shows up later as fatigue cracks at exactly the under-head section the fillet radius R is there to protect. On a heavy structural joint, that 0.4 - 1.0 mm figure is one of the few numbers in the table an inspector will actively gauge.