ASME B18.6.9 Wing Nuts — Type C, Style 1 (Inch)
Inch-series wing nuts in the ASME B18.6.9 (R2017) Type C Style 1 pattern — the fine-pattern, defined-corner wing nut standardised with per-size width across flats, wing thickness and wing projection in the standard's dimension table, the inch counterpart to the DIN 315 wing nut already covered on this site.
Last updated: 2026-11
Specifications
Wing nuts look interchangeable across suppliers until you put two drawings side by side — which is exactly why ASME B18.6.9 exists: it fixes the wing-nut patterns by type and style, so an inch-series callout lands on defined geometry rather than whatever the factory happens to stamp. Type C is the fine pattern with crisp, defined wing corners, and Style 1 is its smaller size range, tabulated in the standard per nominal size with width across flats, wing thickness and wing projection. Those three dimensions are the buying information: width across flats fits the wrench backup when a wing-tightened joint also gets final torque, wing thickness drives the forming die and the strength of the wing itself, and wing projection is the finger clearance the whole product exists to provide. The standard reference is B18.6.9 (R2017) — the R marking the reaffirmation year — and inch wing-nut sources that omit the standard attribution routinely mix patterns, which is why this page is built only on the attributed table. For metric hardware, the DIN 315 pattern is the corresponding common standard and is covered separately; the two are not dimensionally interchangeable, and mixing them on one assembly shows up as inconsistent finger clearance and wrench flats that miss.
| Standard | ASME B18.6.9 (R2017) — wing nuts, inch series; Type C, Style 1 pattern |
|---|---|
| Type / style | Type C — fine pattern with defined wing corners; Style 1 = smaller size range of the type |
| Tabulated dimensions | Per nominal size: width across flats, wing thickness, wing projection |
| Series | Inch; nominal sizes per the standard's Style 1 table |
| Metric counterpart | DIN 315 wing nuts (separate page) — not dimensionally interchangeable with the inch Type C pattern |
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 1 (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
Why does the standard attribution on an inch wing nut matter?
Because "wing nut" is a shape, not a specification. Suppliers' inch charts frequently mix fine stamped patterns with heavier forged forms under one heading; only a B18.6.9-attributed table pins the type and style, and with them the width across flats, wing thickness and wing projection your assembly was designed around. Ordering "a 1/4 wing nut" without the pattern is how consignments arrive that fit the thread but not the fixture.
What should an RFQ for Type C Style 1 wing nuts state?
Nominal size in the inch series, the pattern callout (ASME B18.6.9 Type C, Style 1), material and finish for the environment, quantity, and any certificate requirement. 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