Fixing screws / round head R / fine thread

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Included Nut

[ ! ] L Dimension Tolerance conforms to JIS B 0405 Class m.

Locating Screws	Screw Tip R Type	[ M ] Material	[H]Hardness *	[ S ] Surface treatment	[A]Accessory (Nut 1 pc.)
					[ M ] Material	[ S ] Surface treatment
Fine	STCA	EN 1.1191 Equiv.	45HRC or more	Black Oxide	EN 1.0038 Equiv.	Bright Chromate Plating
	STCAM			Electroless Nickel Plating		Trivalent Chromate
	SSTCA	EN 1.4037 Equiv.	40 to 45HRC	—	EN 1.4301 Equiv.	—
Coarse	STBA	EN 1.1191 Equiv.	40 to 45HRC	Black Oxide	EN 1.0038 Equiv.	Bright Chromate Plating
	STBAM			Electroless Nickel Plating		Trivalent Chromate
	STBAS	EN 1.4301 Equiv.	—	—	EN 1.4037 Equiv.	—
	SSTBA	EN 1.4037 Equiv.	40 to 45HRC	—

[!] Stainless steel hardened type (EN 1.4037 Equiv.) may have individual differences in color due to hardening. (Image: Right)
[ ! ] Shipped with the included nut already attached to main body.　　
* [H]Hardness: Hardened Tip

Specification Table

Part Number	—	L
STBA10	—	50

■Nut T Dimension

M	T (Coarse)	T₁ (Fine)
4	3.2	4
5	4
6	5
8	6.5	5
10	8	6
12	10	6
16	13	8

M	M × Pitch		B	(C)	H	(ℓ₁)	(r)	Z	d	SR₁
M	Fine	Coarse	B	(C)	H	(ℓ₁)	(r)	Z	d	SR₁
4	4 × 0.5	4 × 0.7	7	8.1	2.8	2.1	0.2	3	2	3
5	5 × 0.5	5 × 0.8	8	9.2	3.5	2.4	0.2	3	3	4
6	6 × 0.75	6 × 1.0	10	11.5	4	3.0	0.3	3.5	4.5	4
8	8 × 0.75	8 × 1.25	13	15.0	5.5	3.7	0.4	5	6	5
10	10 × 1.0	10 × 1.5	17	19.6	7	4.5	0.5	5.5	7	5
12	12 × 1.0	12 × 1.75	19	21.9	8	5.2	0.5	7	9	8
16	16 × 1.5	16 × 2.0	24	27.7	10	6	0.6	9	12	10

Part Number		L Selection
Type	M	STCA·STBA										STCAM·SSTCA·STBAM STBAS·SSTBA
(Fine) STCA STCAM SSTCA (Coarse) STBA STBAM STBAS SSTBA	4	15	20	25	30	35	40					20
	5	15	20	25	30	35	40	50				20
	6	15	20	25	30	35	40	50				20	25	30	40	50
	8	15	20	25	30	35	40	50	60	70	80		25	30	40	50	60
	10				30	35	40	50	60	70	80			30	40	50	60	70
	12				30	35	40	50	60	70	80				40	50	60	70	80
	16							50	60	70	80	—

		Mass (g) Ref. Value
M dimension	L	Steel product	Stainless steel product
4	15	2.10	2.12
	20	3.20	3.23
	25	4.30	4.34
	30	5.40	5.46
	35	6.80	6.87
	40	7.40	7.48
5	15	3.70	3.74
	20	4.90	4.95
	25	6.20	6.26
	30	7.50	7.58
	35	8.30	8.38
	40	9.60	9.70
	50	11.10	11.21
6	15	6.20	6.26
	20	7.80	7.88
	25	8.80	8.89
	30	9.80	9.90
	35	11.80	11.92
	40	13.80	13.94
	50	15.80	15.96
8	15	12.40	12.53
	20	14.80	14.95
	25	17.60	17.78
	30	19.30	19.50
	35	21.10	21.32
	40	22.70	22.93
	50	26.10	26.37
	60	29.50	29.80
	70	31.30	31.62
	80	34.20	34.55
10	30	35.80	36.16
	35	41.50	41.92
	40	47.20	47.68
	50	52.90	53.44
	60	58.60	59.20
	70	60.50	61.12
	80	64.30	64.96
12	30	46.70	47.18
	35	51.60	52.13
	40	58.20	58.79
	50	64.90	65.56
	60	71.60	72.33
	70	78.30	79.10
	80	85.00	85.87
16	50	89.30	90.21
	60	96.60	97.58
	70	103.20	104.25
	80	115.60	116.78

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Part Number
SSTBA4-20
SSTBA5-20
SSTBA6-20
SSTBA6-25
SSTBA6-30
SSTBA6-40
SSTBA6-50
SSTBA8-25
SSTBA8-30
SSTBA8-40
SSTBA8-50
SSTBA8-60
SSTBA10-30
SSTBA10-40
SSTBA10-50
SSTBA10-60
SSTBA10-70
SSTBA12-40
SSTBA12-50
SSTBA12-60
SSTBA12-70
SSTBA12-80
SSTCA4-20
SSTCA5-20
SSTCA6-20
SSTCA6-25
SSTCA6-30
SSTCA6-40
SSTCA6-50
SSTCA8-25
SSTCA8-30
SSTCA8-40
SSTCA8-50
SSTCA8-60
SSTCA10-30
SSTCA10-40
SSTCA10-50
SSTCA10-60
SSTCA10-70
SSTCA12-40
SSTCA12-50
SSTCA12-60
SSTCA12-70
SSTCA12-80
STBA4-15
STBA4-20
STBA4-25
STBA4-30
STBA4-35
STBA4-40
STBA5-15
STBA5-20
STBA5-25
STBA5-30
STBA5-35
STBA5-40
STBA5-50
STBA6-15
STBA6-20
STBA6-25

Standard Unit Price	Minimum order quantity	Volume Discount	Standard Shipping Days ?	RoHS	Material	Thread Type	Thread Dia. M	Thread Pitch	Screw Length L	Surface Treatment
5.44 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	4	0.7	20	-
5.44 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	5	0.8	20	-
5.69 € 2.05 €	1	Available	Same day Stock	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	6	1	20	-
5.69 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	6	1	25	-
5.69 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	6	1	30	-
5.69 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	6	1	40	-
5.69 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	6	1	50	-
6.58 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	8	1.25	25	-
6.58 €	1	Available	Same day Stock	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	8	1.25	30	-
6.58 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	8	1.25	40	-
6.58 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	8	1.25	50	-
6.58 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	8	1.25	60	-
8.22 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	10	1.5	30	-
8.22 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	10	1.5	40	-
8.22 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	10	1.5	50	-
8.22 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	10	1.5	60	-
8.22 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	10	1.5	70	-
10.75 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	12	1.75	40	-
10.75 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	12	1.75	50	-
10.75 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	12	1.75	60	-
10.75 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	12	1.75	70	-
10.75 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Coarse	12	1.75	80	-
5.44 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	4	0.5	20	-
5.44 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	5	0.5	20	-
5.69 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	6	0.75	20	-
5.69 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	6	0.75	25	-
5.69 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	6	0.75	30	-
5.69 € 3.02 €	1	Available	Same day Stock	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	6	0.75	40	-
5.69 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	6	0.75	50	-
6.58 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	8	0.75	25	-
6.58 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	8	0.75	30	-
6.58 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	8	0.75	40	-
6.58 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	8	0.75	50	-
6.58 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	8	0.75	60	-
8.22 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	10	1	30	-
8.22 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	10	1	40	-
8.22 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	10	1	50	-
8.22 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	10	1	60	-
8.22 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	10	1	70	-
10.75 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	12	1	40	-
10.75 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	12	1	50	-
10.75 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	12	1	60	-
10.75 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	12	1	70	-
10.75 €	1	Available	5 Days	10	[Stainless Steel] EN 1.4037 Equiv.	Fine	12	1	80	-
2.27 €	1	Available	5 Days	10	[Steel] EN 1.1191 Equiv.	Coarse	4	0.7	15	Black Oxide
2.27 €	1	Available	5 Days	10	[Steel] EN 1.1191 Equiv.	Coarse	4	0.7	20	Black Oxide
2.27 €	1	Available	5 Days	10	[Steel] EN 1.1191 Equiv.	Coarse	4	0.7	25	Black Oxide
2.96 €	1	Available	5 Days	10	[Steel] EN 1.1191 Equiv.	Coarse	4	0.7	30	Black Oxide
2.27 € 1.04 €	1	Available	Same day Stock	10	[Steel] EN 1.1191 Equiv.	Coarse	4	0.7	35	Black Oxide
2.27 € 1.18 €	1	Available	Same day Stock	10	[Steel] EN 1.1191 Equiv.	Coarse	4	0.7	40	Black Oxide
2.27 €	1	Available	5 Days	10	[Steel] EN 1.1191 Equiv.	Coarse	5	0.8	15	Black Oxide
2.27 €	1	Available	5 Days	10	[Steel] EN 1.1191 Equiv.	Coarse	5	0.8	20	Black Oxide
2.27 €	1	Available	Same day Stock	10	[Steel] EN 1.1191 Equiv.	Coarse	5	0.8	25	Black Oxide
2.27 €	1	Available	Same day Stock	10	[Steel] EN 1.1191 Equiv.	Coarse	5	0.8	30	Black Oxide
2.27 €	1	Available	Same day Stock	10	[Steel] EN 1.1191 Equiv.	Coarse	5	0.8	35	Black Oxide
2.27 €	1	Available	5 Days	10	[Steel] EN 1.1191 Equiv.	Coarse	5	0.8	40	Black Oxide
2.27 €	1	Available	5 Days	10	[Steel] EN 1.1191 Equiv.	Coarse	5	0.8	50	Black Oxide
2.40 €	1	Available	5 Days	10	[Steel] EN 1.1191 Equiv.	Coarse	6	1	15	Black Oxide
2.40 €	1	Available	Same day Stock	10	[Steel] EN 1.1191 Equiv.	Coarse	6	1	20	Black Oxide
4.06 €	1	Available	5 Days	10	[Steel] EN 1.1191 Equiv.	Coarse	6	1	25	Black Oxide

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General Information - Set Screws With Stopper

Adjusting screw - adjusting screw round - adjusting screw hexagonal - adjusting screw round tip - adjusting screw set - adjusting screw with nut - adjusting screw with lock nut - adjusting screw knurled head - adjusting screw with grub screw - adjusting screw hexagon socket - adjusting screw grub screw

Selection details of adjusting screws/locating bolts

- Material: steel, stainless steel
- Coatings: uncoated, burnished, chromated, nickel-plated, galvanised
- Hardness: 40 to 50HRC
- Thread: standard thread, fine thread
- External thread: M3 to M20
- Drive: hexagon socket, external hexagon, spanner flat, knurled head
- Length: 10 to 120 mm

Description/Basics

Adjusting screws for mechanical engineering are intended primarily for positioning the most diverse components. In this case, the adjustment screw sets a predetermined distance of the respective component.
Depending on the application, the MISUMI range offers adjusting screws with control threads and adjusting screws with fine threads. A fine-threading facilitates positioning, since a smaller torque is required for the adjustment. Due to the lower slope of the fine thread, a fine threaded adjusting screw is loosened with less probability than one with standard threads. Another advantage of fine threading is the higher load capacity, which allows higher loads to be accommodated in axial direction. In addition, a locating bolt with a fine thread can generate a higher actuating force due to the low pitch.
The loosening or unintentional adjustment of an adjusting screw can be prevented with a locknut. Depending on the design, the appropriate nut is supplied as an accessory for the adjusting screw. Please see the specifications for more information.
An adjusting screw with knurled head facilitates easy manual adjustment without additional tools. The adjusting screw with knurled head is often used where regular adjustment or component replacement is necessary.
The locating bolt is available with a hardened contact surface. It may be hardened on the thread face or on the head or drive. Tempering ensures greater wear protection of the adjusting screw and increases the service life compared to conventional adjusting screws. The additional compensation process can cause discoloration of the material near the contact surface.
Adjusting screws are also available in the form of hexagon sockets. Without a head as drive, which can be advantageous, especially in inaccessible places.

Adjusting screws are often used in combination with stop pins or height adjusting pins. These bolts are inserted into the component to be moved in order to protect it from wear and tear or damage due to multiple adjustments.

Adjusting screws are often found in workpiece carriers and clamping devices. MISUMI also offers similar adjusting screws or locking bolts with a brush head in the form of stopper bolts.

MISUMI offers suitable threaded stopper blocks, optionally with standard threads and fine threads.

Application Examples - Set Screws With Stopper

Application example - adjusting screw with stopper block - adjusting screw with base plate

Application example - adjusting screw set screw
(1) Adjusting screw, (2) threaded stopper block, (3) screw, (4) base plate (meviy ), (5) washer, (6) levelling element

Application example - adjusting screw with nut, adjusting screw with stopper block, adjusting screw with stop bolt

Application example - adjusting screw with nut
Application example – (1) adjusting screw, (2) nut , (3) threaded stopper block, (4) stop pin , (5) movable object

Industrial Applications

3D printer industry

Automotive industry

Pharmaceutical industry

Packaging industry

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Basic Attributes

Material
- Steel
  - EN 1.1191 Equiv.
- Stainless Steel
  - EN 1.4037 Equiv.
  - EN 1.4301 Equiv.
Clear
Thread Type
- Coarse
- Fine
Clear
Thread Dia. M
4

5

6

8

10

12

16
Clear
Thread Pitch
0.5

0.7

0.75

0.8

1

1.25

1.5

1.75

2.0
Clear
Screw Length L
15

20

25

30

35

40

50

60

70

80
Clear
Surface Treatment
- Black Oxide
- Electroless Nickel Plating
Clear
Type
- SSTBA
- SSTCA
- STBA
- STBAM
- STBAS
- STCA
- STCAM
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Optional Attributes

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Frequently Asked Questions (FAQ)

Question:
How can an adjusting screw be secured?: Answer:
An adjusting screw should not be secured with screw locking means as with standard screws. Adjusting screws should remain movable so that it can ensure a set distance. The countering of an adjusting screw with a nut is usually sufficient. Therefore, a position can be defined and simply changed by loosening the lock nut.
Question:
Is there a more precise positioning than that of an adjusting screw?: Answer:
For precise positioning, MISUMI offers adjusting screws with fine threads. Due to the lower slope, these enable more precise positioning or adjustment. Alternatively, a micrometre screw can also be used for low adjustment forces. Similar to stages (coordinate tables), micrometre screws enable highly accurate positioning.
Question:
Do you have adjustment screws without head?: Answer:
MISUMI offers adjusting screws as set screw without head. These are usually provided with an hexagon socket as a drive for fastening or loosening. The adjusting slide as a threaded pin is also significantly more wear-resistant with the hardened tip than conventional set screws.
Question:
Why is the adjusting screw only coated on one side?: Answer:
If an adjusting screw has a unilateral colouration, it is not necessarily the coating. The discoloration is caused by heat treatment, which is also known as an initial colour and does not result in any disadvantages. This tempering process ensures a higher hardness of the material in order to counteract occurring wear.
Question:
For what do you use an adjusting screw?: Answer:
The purpose of using an adjusting screw is multiple. Adjusting screws or locating bolts are used in the industry primarily for the positioning of various components. They set and maintain a predetermined distance from an object. Adjusting screws are often used in coordinate tables in order to adjust the table. From time to time, adjustment screws are also used in mechanical engineering, e.g., for stroke limitation of the industrial shock absorbers.

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