ASME B18.6.9 Wing Nuts — Type C, Style 3 (Inch)
The larger size range of the ASME B18.6.9 (R2017) Type C inch wing-nut pattern, tabulated per nominal size with width across flats, shoulder diameter, wing height, wing thickness and wing span — the heavy finger-tightened fixing where the added shoulder and wing-height columns define the larger envelope.
Last updated: 2026-11
Specifications
ASME B18.6.9 splits its Type C wing nut across styles by size range, and Style 3 is the larger ladder: same fine, defined-corner pattern as Style 1, scaled into diameters where the nut stops being a convenience item and becomes load-bearing hand hardware — formwork, tooling fixtures, valve hand-trims, jigs that are adjusted daily by hand. The standard's Style 3 table adds columns the small sizes do not carry: shoulder diameter (the unthreaded bearing step under the wing), wing height, and wing span — the overall tip-to-tip reach that decides whether a gloved or crowded hand can actually turn the nut in situ. That is the practical difference when specifying at the large end: on small wing nuts the wing projection suffices, but a Style 3 purchase usually starts from the span and wing height that fit the operator's access, then confirms width across flats and shoulder diameter against the mating thread and clearance hole. As with Style 1, only the B18.6.9-attributed table pins these five dimensions to a defined pattern; unattributed inch charts mix forms and leave the buyer to discover the difference at assembly. Both styles are on this site with their tables' column sets stated, so a mixed inch order can cite the same standard for both size ranges.
| Standard | ASME B18.6.9 (R2017) — wing nuts, inch series; Type C, Style 3 pattern |
|---|---|
| Type / style | Type C — fine pattern with defined wing corners; Style 3 = larger size range of the type |
| Tabulated dimensions | Per nominal size: width across flats, shoulder diameter, wing height, wing thickness, wing span |
| Series | Inch; nominal sizes per the standard's Style 3 table |
| Companion page | Type C Style 1 covers the smaller size range of the same pattern (separate page) |
Materials
- Steel, stainless steel — grade and finish confirmed at quotation (tenant supply range)
Ordering & documentation
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 B18.6.9 Wing Nuts — Type C, Style 3 (Inch)) 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 10,000 pieces. Stock items run 3–7 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.
Frequently asked questions
Style 1 or Style 3 for a given thread size?
Follow the standard's own split — the two styles divide the Type C size range between them, and a thread size falls in one table or the other, not both. The practical check at the boundary is envelope: Style 3's table carries shoulder diameter, wing height and wing span because the larger nuts are specified by the room they occupy as much as by their thread. Quote the style with the size so both sides read the same table.
What should an RFQ for Type C Style 3 wing nuts state?
Nominal size in the inch series, the pattern callout (ASME B18.6.9 Type C, Style 3), material and finish for the environment, quantity, and any certificate requirement — plus wing span or wing height if operator access constrains the envelope. Per-size dimensions from the standard's table are confirmed with the quotation.
What is the MOQ and lead time for this nut type?
The minimum order quantity is 10,000 pieces. Stock items ship in 3–7 days; non-stock items are confirmed at quotation. Confirm the exact schedule against quantity and size mix at quotation.
Request a Quote
Get factory-direct pricing from the manufacturer.
What to include in your inquiry
- ✓ Standard and property class (e.g. DIN 912, ISO 4762, class 8.8) — or a drawing for custom parts.
- ✓ Sizes, lengths and thread type (metric or inch).
- ✓ Quantity per size and your target delivery date.
- ✓ Destination country, plus any coating or finish requirement.
- ✓ Any documents you need with the shipment (e.g. mill test certificate) so the quote includes them.
- ✓ Your inquiry goes straight to the factory team by email and gets a reply within 24 hours.
- ✓ Factory-direct pricing
- ✓ Standard and custom specifications
- ✓ Factory-direct export to buyers in Europe, Asia, the Americas and the Middle East
- ✓ Full fastener family support