What are the types of space-saving bolts?

Mainly divided into low head bolts and ultra low head bolts, according to the thickness of the bolt head. Among them, the thinnest head is only 1mm thick, which can save up to 80% of the space compared to standard bolts (5mm).

What are the types of ultra low head bolts?

Mainly divided into hex socket type, hex head type and star hole type, according to the different installation methods. For the matching wrenches required for tightening the hex socket type and star hole type, refer to Matching Wrenches.

Which parts and components sold by MISUMI are generally used for ultra low head bolts?

Recommended for use with hex posts, round posts and linear guide shafts.

What is the strength class of the ultra low head bolt?

The product strength of SCM435 (equivalent) is classified as 10.9.

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Part Number Complete

C-CBSS2.5-4

type Nominal of Thread (M) Length L SurfaceTreatment CAD Days to Ship

Specification/Dimensions

type
- C-CBSA
- C-CBSS
Clear
Nominal of Thread (M)
2.5

3

4

5

6
Clear
Length L(mm)
4

5

6

8

10

12

16

20
Clear
SurfaceTreatment
- Trivalent Chromate
  - Trivalent Chromate
- Phosphate Treatment
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

Same day
Clear

Specify Alterations

Ultra Low Head Hex Socket Head Cap Screws【50 Pieces Per Package】 (Part Number)

Volume Discount

Check FAQ of this product (4 items)

Brand :

MiSUMi Economy

Order Qty :
Total Price :

---
Days to ship :

---

Select part number to Order Now/ Add to Cart

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Product Description

- Economy series Ultra Low Head Hexagon Socket Head Cap Screws
- Part number for series including of C-CBSA and C-CBSS.
- Basic Shape: Standard (Round)
- Head Shape : Low Head
- Mounting Hole Shape: Hex Socket.
- Bolt Material: Steel SCM435 Equivalent
- Surface Treatment: Trivalent Chromate and Black Phosphate Treatment
- Nominal Thread (M): 2.5, 3, 4, 5 and 6.
- Hardness: 32~ 39 HRC
- Strength: 10.9
- Head Strength: 5.8
- Sales unit: Pack (the quantity = 50 Pcs/Pack)

Economy Ultra Low Head Hex Socket Head Cap Screws

Space Saving BoltsUltra Low Head ScrewsHex Socket Head Cap Screws

- Ultra-low head design reduces head height for a sleek, space-saving solution.

- Engineered from SCM435 material, these screws boast a strength class of 10.9, ensuring durability and reliability.

- Choose the perfect thread length to meet your specific design needs, offering flexibility in various applications.

- Available with Trivalent Chromate and Black Phosphate treatments for enhanced corrosion resistance and aesthetic appeal.

- Most models are in stock and ready for same-day shipping, so you can get the parts you need without delay.

Economy Ultra Low Head Hex Socket Head Cap Screws

MISUMI Standard

Cheaper Price

Product Variety

3D CAD
3D CAD Support

Product Overview of Space Saving Bolts

Ultra low head hex socket bolts, Space Saving Bolts are special bolts developed to reduce the height space of the screw head. It is not necessary to process countersinking on the mating materials like flat head bolts.

Product Feature of Space Saving Bolts

Feature of Space Saving Bolts 1: The thickness of the screw head is relatively thinner than that of standard screws, and it is mainly used in some small equipment with high space-saving requirement.
Feature of Space Saving Bolts 2: For SCM435 material, strength class is up to 10.9.
Feature of Space Saving Bolts 3: According to the actual design needs, the thread length can be freely specified in the range.
Feature of Space Saving Bolts 4: Screw material is SCM435 only.
Feature of Space Saving Bolts 5: Most of the models are in stock, allowing same-day shipment.

Dimensional Drawing of Space Saving Bolts

misumi CBS Ultra-low Head Screw M2 to M10 Size standards drawing

Specifications Overview of Space Saving Bolts

TYPE	Material of Space Saving Bolts	Hardness	Surface Treatment	Strength	Head Strength
C-CBSS	SCM435 equivalent	32 to 39HRC	Phosphate Treatment	10.9	5.8
C-CBSA			Trivalent Chromate Treatment

Example Use of Space Saving Bolts

misumi CBS Ultra-low Head Bolt M2 to M10 Complete method of use

Mechanism name of Space Saving Bolts:
Stackable workpiece fixture.

Mechanism function of Space Saving Bolts:
Fixture used to fix the workpiece before the bonding material is hardened.

Role of ultra short head hex socket bolts:
After the ultra short head hex socket bolts are used, the four points can be in a plane, and the thickness of the bolt head is thinner, which saves counterbore space and allows stacking on top.

Application Industries of Space Saving Bolts

Electronic & Electrical Appliances	Smart phone	Medical

Robotics	Semiconductor	Lithium battery

Precautions of Space Saving Bolts

① Space Saving Bolts As the head height decreases, the strength also decreases accordingly.
② One type of material is available: SCM435.
③ The recommended tightening torque varies with the material and the screw diameter. Note that the tightening torque should not be too large, otherwise screw slippage will occur.
For detailed parameters, refer to overview of space-saving bolts, Space Saving Bolts.
④ For the surface treatment of CBSA type, there may be slight difference in color depending on the batch.

Related Products of Space Saving Bolts

Ultra-low head bolt Hex socket on head	Round Post	Hex Post

Typical Space Saving Bolts model: CBSKE5-16	Typical Space Saving Bolts model: PETGR10-150	Typical Space Saving Bolts model: LSBRK13-100
Advantages of Space Saving Bolts: space saving, sufficient stock	Advantages of Space Saving Bolts: easy to mount, suitable for tight spaces	Advantages of Space Saving Bolts: easy to mount, suitable for tight spaces

Specification Table of Space Saving Bolts

Please order of Space Saving Bolts after selecting part number and parameters according to the selection steps

		Part Number (Type·M)	－	L
		C-CBSA3	－	6

Part Number		L Selection								MxP	A	B	E	t max.	(e) max.	r
Type	M (Coarse Thread)	L Selection								MxP	A	B	E	t max.	(e) max.	r
C-CBSS C-CBSA	2.5	4	5	6	8					2.5×0.45	5	1.3	1.3	1.5	1.5	Above 0.1
	3	4	5	6	8	10				3×0.5	6	1.5	1.3	2	1.6	Above 0.1
	4			6	8	10	12			4×0.7	8	2	1.5	2.5	1.6	Above 0.2
	5			6	8	10	12	16		5×0.8	9	3	1.5	3	2	Above 0.2
	6				8	10	12	16	20	6×1.0	10	3	1.5	4	2.5	Above 0.25

Part Number

Incomplete part number.
Please use left hand selections to complete a part number.

: 30; 60; 90

Part Number
C-CBSS2.5-4

Part Number	Price	Minimum Order Qty.	Number of pc(s). included in pkg.	Volume Discount	Days to Ship	RoHS	Nominal of Thread (M)	Length L (mm)	SurfaceTreatment
	₹ 900.00	1 Pack(s)	50 Pieces Per Package	Available	Same day	10	2.5	4	Phosphate Treatment

Basic Information

Detailed Shape	Ultra Low Head	Mounting Hole Shape	Hex Socket	Material	SCM435 Equivalent
Basic Shape	Standard (Round)	Thread Type	Metric, Coarse	Application	Standard

Please check the type/dimensions/specifications of the part C-CBSS2.5-4 in the Ultra Low Head Hex Socket Head Cap Screws series.

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

Frequently asked question (FAQ)

Question: What are the types of space-saving bolts?: Answer: Mainly divided into low head bolts and ultra low head bolts, according to the thickness of the bolt head. Among them, the thinnest head is only 1mm thick, which can save up to 80% of the space compared to standard bolts (5mm).
Question: What are the types of ultra low head bolts?: Answer: Mainly divided into hex socket type, hex head type and star hole type, according to the different installation methods. For the matching wrenches required for tightening the hex socket type and star hole type, refer to Matching Wrenches.
Question: Which parts and components sold by MISUMI are generally used for ultra low head bolts?: Answer: Recommended for use with hex posts, round posts and linear guide shafts.
Question: What is the strength class of the ultra low head bolt?: Answer: The product strength of SCM435 (equivalent) is classified as 10.9.

Check other FAQ (1 items) Hide

Product variants

Part Number
C-CBSA2.5-8
C-CBSA3-10
C-CBSA3-4
C-CBSS2.5-5
C-CBSS2.5-6
C-CBSS2.5-8

Standard Unit Price	Number of pc(s). included in pkg.	Minimum order quantity	Volume Discount	Days to Ship	RoHS	Nominal of Thread (M)	Length L (mm)	SurfaceTreatment
₹ 914.00	50 Pieces Per Package	1 Pack(s)	Available	Same day Stock	10	2.5	8	[Trivalent Chromate] Trivalent Chromate
₹ 961.00	50 Pieces Per Package	1 Pack(s)	Available	Same day Stock	10	3	10	[Trivalent Chromate] Trivalent Chromate
₹ 868.00	50 Pieces Per Package	1 Pack(s)	Available	Same day Stock	10	3	4	[Trivalent Chromate] Trivalent Chromate
₹ 900.00	50 Pieces Per Package	1 Pack(s)	Available	Same day Stock	10	2.5	5	Phosphate Treatment
₹ 899.00	50 Pieces Per Package	1 Pack(s)	Available	Same day Stock	10	2.5	6	Phosphate Treatment
₹ 914.00	50 Pieces Per Package	1 Pack(s)	Available	Same day Stock	10	2.5	8	Phosphate Treatment

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