EKINSUN is a custom parts manufacturer that machines wing nuts and wing screws to drawing: a longer span, a fine or left-hand pitch, a taller body for a long stud, 316L or brass above the standard sizes, a wing screw with a shoulder. The size ranges are those a distributor stocked in 2026.
A typical request: M16 wing nuts in stainless for a tarpaulin frame, where the crew wears gloves and the wings need to be wider than the DIN ones.
Span for a hand is a real specification; DIN 315 does not offer it.
Wing nut and wing screw forms and size ranges
Standard wing nuts run from M3 to M24: the pressed DIN 315 form M3–M12, the cast form M4–M24, rod-wing nuts M6–M12 and wing screws DIN 316 M3–M16, in 304 stainless, zinc-plated steel, brass or nylon.
| Form | Standard | Size range | Common materials | Notes |
|---|---|---|---|---|
| Pressed wing nut (German form) | DIN 315 | M3–M12 | 304 stainless; zinc and black steel M3–M16; nylon M3–M12 | stamped and formed; light, low cost |
| Cast wing nut (American form) | DIN 315 (cast) | M4–M24 | 304; brass M4–M20; zinc steel | solid, rounded wings; stronger and better in the hand |
| Rod-wing nut | maker series | M6–M12 | 304 | two welded rods as wings; the longest lever, for tarpaulin and scaffold fittings |
| Wing screw | DIN 316 | M3–M12 (pressed), M4–M16 (ingot / cast) | 304; zinc steel M4–M8 | the male part: wings on a screw |
| Ingot thumb screw | maker series | M4–M16 | 304 | a flat oblong head between wing and thumb screw |
| Z-handle and lobe knob screws | maker series | M4–M12 | 304; plastic-headed steel | see clamping knobs and levers |
| Nylon wing nut | — | M3–M12 | nylon 66, white and black | insulating; see plastic fasteners |
Need wing nuts and wing screws in a size, thread or material no catalogue lists? EKINSUN is a custom parts manufacturer: we make wing nuts and wing screws to your drawing, sketch or sample, steel, 304 stainless steel or brass, from 1 piece, quoted in 12 hours and shipped duties paid. Already a catalogue size? Ask us too, we may have it in stock, and larger quantities cost less per piece. All custom fasteners
Pressed or cast, wing nut or wing screw
A pressed wing nut suits light indoor duty up to M8, a cast wing nut suits outdoor and gloved use from M8 up, a rod-wing nut gives the most hand torque, and anything in stainless above M12 or in a fine pitch is machined.
| Situation | Form | Why |
|---|---|---|
| Light duty, indoor, opened often, small sizes | pressed DIN 315 | cheapest, lightest; the sheet wings are enough for hand torque at M3–M8 |
| Outdoor, frequent use, M8 and up, gloved hands | cast wing nut | solid wings do not bend, rounded edges do not cut |
| The biggest hand torque with no tool at all | rod-wing nut | the rods are the longest lever a wing nut offers |
| The threaded part must stay with the removable panel | wing screw DIN 316 | nothing to lose on the bench |
| Stainless above M12, or any fine pitch | machined wing nut | the standard sizes stop there |
| A span, height or wing shape for a specific hand, guard or tool clearance | machined wing nut | wings milled to your span; body turned to your height |
What to send for a wing nut or wing screw that is not standard
- Thread and pitch, and hand (left-hand wing nuts exist on counter-rotating fittings).
- Wing span tip to tip, and wing height, if a hand or a guard sets them.
- Body height, if a long stud must be covered or a low profile is needed.
- Material: 304 for outdoor, 316L for marine, brass for electrical or decorative, steel zinc for indoor.
- For a wing screw: thread length and whether a shoulder or a dog point is wanted.
- Quantity and finish.
Read the pitch before you order the wing nut. Lay a steel rule along ten thread crests and divide by ten: 10 mm over ten pitches is a 1 mm pitch (M6 coarse), 12.5 mm is M8 coarse, 15 mm is M10 coarse, 17.5 mm is M12 coarse. A reading that is not a round number of millimetres is an inch thread, and a reading that is shorter than the coarse pitch for that diameter is a fine thread. If diameter, pitch and the size range in the table all agree, the part is a standard size: buy it off the shelf, or have it made to order from 1 piece. If any of the three falls outside the table, we make it to your reading. The full measuring routine, including the inch traps
Where the wing nut catalogue stops
A pressed wing nut M3–M12 or a cast wing nut M4–M24 in 304 or zinc steel with a coarse pitch is a catalogue part; a fine or left-hand pitch, stainless above M12 pressed or M24 cast, a wider span or a taller body is machined from 1 piece.
| What you need | In the catalogue? | What we make |
|---|---|---|
| Pressed wing nut M3–M12 or cast wing nut M4–M24 in 304 or zinc steel, coarse pitch | Yes | Buy it from stock, or have it made to order from 1 piece. No one-off competes with a pressed or cast wing nut. Standard parts: ask us too, we may have them in stock. |
| Wing screw DIN 316 M3–M16 in 304 | Yes | Standard sizes: buy them off the shelf, or have them made to order from 1 piece. Standard parts: ask us too, we may have them in stock. |
| A wing nut in a fine or left-hand pitch, any size | No | Machined from bar with milled wings and the thread cut to your reading; from 1 piece. |
| Stainless wing nuts above M12 pressed, or above M24 cast; brass above M20 | No | Machined in 304, 316L or brass. |
| A wing span or wing shape for gloved hands, a guard or a tool clearance | No | Wings milled to your span; edges radiused. |
| A taller body to cover a long stud, or a low body for a tight space | No | Turned to height; wings unchanged. |
| A wing screw with a shoulder, a captive washer or a dog point | No | Machined; thread length to your panel. |
| A wing nut in aluminium 6061 or 7075 | Partly | Machined on request for light, low-preload fittings; not offered where the joint is torqued hard, and we say so. |
Materials
Standard wing nuts come in 304 stainless, zinc-plated or black steel, brass and nylon 66; machined wing nuts add 316L, free-machining 303 and aluminium 6061 or 7075.
| Material | Designation | Where it fits here |
|---|---|---|
| Stainless 304 | 1.4301 / A2 | standard pressed and cast wing nuts, wing screws; outdoor frames |
| Stainless 316L | 1.4404 / A4 | machined to order for marine and pool hardware |
| Free-machining stainless | 303 / 1.4305 | custom machined wing nuts with milled wings |
| Carbon steel, zinc or black | low-carbon; malleable iron for cast forms | standard indoor wing nuts M3–M16 |
| Brass | CW614N / C36000 | standard cast wing nuts M4–M20; electrical and decorative |
| Aluminium 6061 | AlMg1SiCu | machined light wing nuts for low-preload fittings |
| Aluminium 7075 | AlZn5.5MgCu | machined where a light, harder wing nut is wanted |
| Nylon 66 | PA66 | insulating wing nuts M3–M12 |
Related pages
- every fastener family by standard and size range, all families with standard and size range
- Thumb screws, knurled hand screws
- Knurled nuts, knurled hand nuts
- star, lobe and ball knobs: star knobs, lobe knobs, adjustable levers
- cap nuts, closed-end nuts
- Eye bolts, the other hand-fitted hardware on frames and covers
Frequently asked questions
A pressed wing nut is stamped from sheet and formed; it is light and cheap and standard to M12. A cast wing nut is a solid casting with rounded wings; it is stronger, kinder to the hand and standard to M24. Both are DIN 315 forms.
As much as a hand can put on the wings, which depends on the span and the person; that is why the span is the specification that matters. A rod-wing nut gives the most, a pressed nut the least. A wing nut is never the fastener for a joint that must be torqued to a value.
Not as standard parts. Fine and left-hand pitches, sizes above the size ranges and stainless above M12 pressed or M24 cast are machined with milled wings, from 1 piece.
Yes. The wings are milled to the span you specify and the edges radiused; the thread stays standard, so the fitting underneath is unchanged.
EKINSUN is a custom parts manufacturer that machines wing nuts and wing screws in 304 and 316L stainless, steel, brass and aluminium, in any pitch and span, from 1 piece, with a quote within 12 hours.
No list price; the drivers are material, the milled wings, the pitch and quantity. A batch of 304 wing nuts in a fine pitch is a short turning and milling job; a single 316L rod-wing nut above M20 is priced as the fabricated part it is. The quote states which.
Send the thread and the span
Thread and pitch, wing span, body height if it matters, material, quantity, and for a wing screw the thread length. A photo of the fitting works. From 1 piece, quote within 12 hours.