We specialize in very small micro setscrews from M1 to M2.5.

Our Standard Very Small Micro Slotted Setscrews (DELscrew)

Our standard very small micro slotted setscrews manufacture and sales.		Three good points of the small micro slotted setscrew (DELscrew） Custom-ordered small micro screws Custom-ordered precision miniature parts An ingredient list of the steel which we use An ingredient list of the atainless steel which we use Click the above, you can see a detailed description.
DELscrew is a brand name of our standard very small micro slotted setscrew.
Materials of DELscrew are steel and stainless steel.
Those are listed in the table below.

Steel DELscrew
The steel materials which we use are SUM24L equivalency of JIS. JIS stands for Japanese Industrial Standards. Click here, you can watch an ingredient list of the steel materials which we use. The steel DELscrew tip shapes are four kinds. 　(1) Flat Point 　(2) Cone Point (90) 　(3) Cone Point (120) 　(4) Round (Oval) Point For details click each. Click photographs to enlarge.
Flat Point	Cone Point (90)	Cone Point (120)	Round (Oval) Point
Nominal diameters of the Steel DELscrew is as follows. 　 M1, M1.2, M1.4, M1.6, M1.7, M2, M2.3, M2.5 M1.7 and M2.3 are old JIS standards, they are also non-ISO standards.
The steel DELscrew standard lengths has the dimensions in below. 　1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm 　2.0mm, 2.5mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm The lengths shorter than 2.0mm are non-ISO standards, and we set the tolerance of +0.05mm/-0.05mm for these. The lengths from 2.0mm to 6.0mm are ISO standards, and we set the tolerance of +0/-0.2mm (or +0/-0.3mm) for these.
The steel DELscrew which we have in stock is zinc plating setscrew. Thickness of these zinc plating are from 3μm to 5μm. Based on the RoHS directive, they are treated with trivalent chromate. And, the steel DELscrew stock colors are Black color and White Silver color.

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Stainless steel DELscrew

The stainless steel materials which we use are SUS303 equivalency of JIS.

Click here, you can watch an ingredient list of the stainless steel materials which we use.

The stainless steel DELscrew tip shapes are two kinds.

　 (1) Flat Point
　 (2) Cone Point (90)

For details click each. Click photographs to enlarge.

Flat Point

Cone Point (90)

Nominal diameters of the stainless-steel DELscrew is as follows.

　 M1, M1.2, M1.4, M1.6, M1.7, M2

M1.7 is old JIS standards and that is non-ISO standards.

The stainless steel DELscrew standard lengths has the dimensions in below.

　 1.0mm, 1.2mm, 1.5mm, 1.8mm

　 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm

The lengths shorter than 2.0mm are non-ISO standards, and we set the tolerance of +0.05mm/-0.05mm for these.

The lengths from 2.0mm to 4.0mm are ISO standards, and we set the tolerance of +0/-0.2mm (or +0/-0.3mm) for these.

But, the length 3.5mm is non-ISO standards.

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Three good points of our micro slotted setscrews (DELscrew)

Our micro setscrews (DELscrew) has three good points below, because our manufacturing machines are the microcomputer control cam-type automatic lathes.

[Good point 1]
High quality setscrew and precision setscrew is manufactured by the threading chaser

In general cam-type automatic lathes,
the screw thread are manufactured by a thread cutting die.

In our microcomputer control cam-type automatic lathes,
the screw thread are manufactured by the threading chaser.

Material of a thread cutting die is dies steel, by contrast,
material of the threading chaser is cemented carbide.

Cemented carbide is a more hard material than dieｓ steel.

Therefore, Attrition of cemented carbide is slower than dies steel.

As a result, changes in the effective diameter of the screw will be slower.

In general cam-type automatic lathes, during the production process using a thread cutting die, there is possibility that defects of occur below.

(1) Predetermined screw length don't been manufactured, and short screw length.
(2) Screw thread is nothing.

These defects do not occur, because our microcomputer control cam-type automatic lathes manufacture the screw thread by the threading chaser.

Therefore,we have high quality, and high screws precision.

[Good point 2]
High productivity setscrew by the cam-type automatic lathe

Our microcomputer control cam-type automatic lathes have higher productivity than the NC automatic lathes.

For example, M2x2.0 setscrew of free-cutting steel is manufactured in 2.1 seconds.

During the production of 24 hours a day, one machine can manufacture about 35,000 pieces.

During the production of 20 days one month, one machine can manufacture about 700,000 pieces.

Such a high productivity of our company, can accommodate a sudden increase in amount of customer orders.

[Good point 3]
Low price setscrew by the cam-type automatic lathe

Low cost is achieved by the high productivity of the listed above.

Since 1965, more than 45 years abundant experience and achievements

Its establishment in 1965, and more than 45 years, offers slotted screws.

A thread cutting die's machining is difficult, especially when the screw thread length is shorter than double pitch.

But, our microcomputer control cam-type automatic lathes manufacture the screw thread by the threading chaser.

Therefore, especially when the screw thread length is shorter than double pitch, is easy machining by the threading chaser.

Also, we can manufacture the slotted head machine screws incomplete thread of less than pitch one.

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Custom-ordered small screws

Custom-ordered small screws.

The custom-ordered Micro Setscrews manufacture and sale

We can manufacture the setscrews of nominal diameter from M0.8 to M3.
We can manufacture the setscrews of length from 0.8mm to 10mm.
We can manufacture the setscrews of various materials, steel, stainless steel, brass, aluminum, phosphor bronze and so on.
Various plating and heat treatment are possible.

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The custom-ordered Slotted Head Machine Screws manufacture and sales

We can manufacture the machine screws of nominal diameter from M0.3 to M3.
We can manufacture the machine screws that the screw thread length is shorter than twofold nominal diameter.
We can manufacture the machine screws that have the head diameter from 1.0mm to 5.0mm.
Various plating and heat treatment are possible.

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Custom-ordered precision miniature machined parts

Custom-ordered precision miniature machined parts manufacture and sales

Custom-ordered precision miniature machined parts

We can manufacture the outside diameter from 0.3mm to 4.0mm.
The manufacture length is possible from 0.5mm to 10.0mm.
Various plating and a simple barrel treatment are possible.

(photo)

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An ingredient list of the steel materials which we use.

Manufacturer: AKIYAMA SEIKO Co., Ltd.

Type of Material: ASK-2600S　( Free-cutting steel )

CHEMICAL COMPOSITION ( % )
ELEMENTS	C	Si	Mn	P	S	Pb	Te
SPECIFICATION	MAX 0.15	MAX 0.10	0.85 1.25	0.040 0.090	0.260 0.350	0.21 0.34	0.030 0.080
DATA	0.06	0.01	1.10	0.056	0.270	0.24	0.040

The remainder is Fe.

The lead (Pb) content of steel materials adapts to RoHS regulation.

In the RoHS regulation, as for the content of lead (Pb) in steel materials, less than 0.35% are OK.

Cadmium (Cd) is not included in the steel.

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Fe: Iron　　(Ferrum is a meaning of iron in Latin.)

C: Carbon

Si: Silicon

Mn: Manganese

P: Phosphorus

S: Sulfur

Pb: Lead　　(Pb is an abbreviation from Plumbic.)

Te: Tellurium

An ingredient list of the stainless steel materials which we use.

Manufacturer: AKIYAMA SEIKO Co., Ltd.

Type of Material: ASK-3000FL ( Free-cutting stainless steel )

CHEMICAL COMPOSITION ( % )
ELEMENTS	C	Si	Mn	P	S	Ni	Cr	Mo	Pb
SPECIFICATION	MAX 0.15	MAX 1.00	MAX 2.00	MAX 0.050	0.150 MIN	9.00 10.00	17.50 19.00	MAX 0.60	0.15 0.30
DATA	0.06	0.14	1.74	0.038	0.312	9.04	18.08	0.24	0.21

The remainder is Fe.

The lead (Pb) content of stainless steel materials adapts to RoHS regulation.

In the RoHS regulation, as for the content of lead (Pb) in stainless steel materials, less than 0.35% are OK.

Cadmium (Cd) is not included in the stainless steel.

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Fe: Iron　　(Ferrum is a meaning of iron in Latin.)

C: Carbon

Si: Silicon

Mn: Manganese

P: Phosphorus

S: Sulfur

Ni: Nickel

Cr: Chromium

Mo: Molybdenum

Pb: Lead　　(Pb is an abbreviation from Plumbic.)