What does the '8-Mark' on the bolt head indicate?

The 8-Mark signifies a strength classification of 8T, meaning the bolt has a minimum tensile strength of 80 kgf/mm², ensuring high load-bearing capacity.

Why is a high-tensile bolt necessary for certain applications?

High-tensile bolts like this one can withstand greater forces, making them essential for: •Heavy machinery and structural assemblies •Automotive and aerospace applications •High-load industrial equipment

How does the tensile strength compare to standard bolts?

An 8T-rated bolt is significantly stronger than a standard Grade 4.6 or 5.8 bolt, offering higher load-bearing capacity and durability.

How do I prevent galling when tightening these bolts?

To prevent galling: •Use proper lubrication (e.g., anti-seize compounds). •Tighten bolts slowly and evenly to reduce heat buildup. •Avoid over-tightening, which may cause thread damage.

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Part Number Complete

HXN8BH-ST3W-M8-75

Specification/Dimensions

type
- HXN8BH-ST3W-M
- HXN8BH-STC-M
- HXN8BH-STCG-M
Clear
Nominal of Thread (M)
8

10

12

16

20
Clear
Length L (mm)
30

35

40

45

50

55

70

75

80

85

90

100

110

120

130

150
Clear
Surface Treatment
- Trivalent Chromate
  - Trivalent White
- Chromate Plating
  - Chromate Plating
  - Green Chromate
Clear
Sales Unit
Low Quantity (can be purchased from one)

Box/package
Clear
Thread Length(mm)
- 22
- 25
- 26
- 30
- 38
- 50
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

5 Day(s) or Less

14 Day(s) or Less

26 Day(s) or Less
Clear

Specify Alterations

8-Mark Hexagon Bolt Half-Thread【1-120 Pieces Per Package】 (HXN8BH-ST3W-M8-75)

Volume Discount

Check FAQ of this product (4 items)

Brand :

Order Qty. :

Check Price / Days to ship
Price :

---
Total Price :

---
Days to ship :

---

Configured Specifications

Nominal of Thread (M)	8	Length L (mm)	75
Detailed Shape	[Standard] Standard	Mounting Hole Shape	[Not Provided] No
Material	[Steel] SWCH Equivalent	Surface Treatment	[Trivalent Chromate] Trivalent White
Thread Type	Metric coarse	Additional Shape	Standard
Sales Unit	Low Quantity (can be purchased from one)	Application	High Strength
Strength Class (Steel)	8.8	Thread Length(mm)	25
Show More
RoHS	10	-	-
Show Less

Order Qty. :

Check Price / Days to ship
Price :

---
Total Price :

---
Days to ship :

---

Configured Specifications

Nominal of Thread (M)	8	Length L (mm)	75
Detailed Shape	[Standard] Standard	Mounting Hole Shape	[Not Provided] No
Material	[Steel] SWCH Equivalent	Surface Treatment	[Trivalent Chromate] Trivalent White
Thread Type	Metric coarse	Additional Shape	Standard
Sales Unit	Low Quantity (can be purchased from one)	Application	High Strength
Strength Class (Steel)	8.8	Thread Length(mm)	25
Show More
RoHS	10	-	-
Show Less

Order Qty. :

Check Price / Days to ship
Price :

---
Total Price :

---
Days to ship :

---

Configured Specifications

Nominal of Thread (M)	8	Length L (mm)	75
Detailed Shape	[Standard] Standard	Mounting Hole Shape	[Not Provided] No
Material	[Steel] SWCH Equivalent	Surface Treatment	[Trivalent Chromate] Trivalent White
Thread Type	Metric coarse	Additional Shape	Standard
Sales Unit	Low Quantity (can be purchased from one)	Application	High Strength
Strength Class (Steel)	8.8	Thread Length(mm)	25
Show More
RoHS	10	-	-
Show Less

Product Description

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Hex Screw
[Features]
•Material: Steel/SWCH Equivalent
•Surface treatment: Trivalent Chromate White, Chromate Plating (Chromate Plating, Green Chromate)
•Thread Type: Metric Coarse
•Nominal of Thread(M): 8, 10, 12, 16, 20
•Thread length/l Min./Max.(mm): 30 / 150
•Strew Type: Half thread
•Strength classification:8T (minimum tensile load 80kgf /mm^2)
*This product has 8-Mark on its head.

Volume Discount

Check FAQ of this product (4 items)

Brand :

EURA SS

Order Qty. :

Check Price / Days to ship
Price :

---
Total Price :

---
Days to ship :

---

Configured Specifications

Nominal of Thread (M)	8	Length L (mm)	75
Detailed Shape	[Standard] Standard	Mounting Hole Shape	[Not Provided] No
Material	[Steel] SWCH Equivalent	Surface Treatment	[Trivalent Chromate] Trivalent White
Thread Type	Metric coarse	Additional Shape	Standard
Sales Unit	Low Quantity (can be purchased from one)	Application	High Strength
Strength Class (Steel)	8.8	Thread Length(mm)	25
Show More
RoHS	10	-	-
Show Less

Order Qty. :

Check Price / Days to ship
Price :

---
Total Price :

---
Days to ship :

---

Configured Specifications

Nominal of Thread (M)	8	Length L (mm)	75
Detailed Shape	[Standard] Standard	Mounting Hole Shape	[Not Provided] No
Material	[Steel] SWCH Equivalent	Surface Treatment	[Trivalent Chromate] Trivalent White
Thread Type	Metric coarse	Additional Shape	Standard
Sales Unit	Low Quantity (can be purchased from one)	Application	High Strength
Strength Class (Steel)	8.8	Thread Length(mm)	25
Show More
RoHS	10	-	-
Show Less

: 30; 45; 60

Part Number
HXN8BH-ST3W-M8-75

Part Number	Price	Minimum Order Qty.	Volume Discount	Days to Ship	RoHS	Nominal of Thread (M)	Length L (mm)	Surface Treatment	Sales Unit	Thread Length (mm)
	₹ 100.00	1 Piece(s)	Available	5 Day(s) or more	10	8	75	[Trivalent Chromate] Trivalent White	Low Quantity (can be purchased from one)	25

Part Number

Part Number	Price	Minimum Order Qty.	Volume Discount	Days to Ship	RoHS	Nominal of Thread (M)	Length L (mm)	Surface Treatment	Sales Unit	Thread Length (mm)

Basic Information

Detailed Shape	Standard	Mounting Hole Shape	No	Material	SWCH Equivalent
Thread Type	Metric coarse	Additional Shape	Standard	Application	High Strength
Strength Class (Steel)	8.8

Please check the type/dimensions/specifications of the part HXN8BH-ST3W-M8-75 in the 8-Mark Hexagon Bolt Half-Thread 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 does the "8-Mark" on the bolt head indicate?: Answer: The 8-Mark signifies a strength classification of 8T, meaning the bolt has a minimum tensile strength of 80 kgf/mm², ensuring high load-bearing capacity.
Question: Why is a high-tensile bolt necessary for certain applications?: Answer: High-tensile bolts like this one can withstand greater forces, making them essential for:
•Heavy machinery and structural assemblies
•Automotive and aerospace applications
•High-load industrial equipment
Question: How does the tensile strength compare to standard bolts?: Answer: An 8T-rated bolt is significantly stronger than a standard Grade 4.6 or 5.8 bolt, offering higher load-bearing capacity and durability.
Question: How do I prevent galling when tightening these bolts?: Answer: To prevent galling:
•Use proper lubrication (e.g., anti-seize compounds).
•Tighten bolts slowly and evenly to reduce heat buildup.
•Avoid over-tightening, which may cause thread damage.

Check other FAQ (1 items) Hide

Product variants

Part Number
HXN8BH-ST3W-M10-40
HXN8BH-ST3W-M10-45
HXN8BH-ST3W-M10-55
HXN8BH-ST3W-M8-80
HXN8BH-ST3W-M8-85
HXN8BH-ST3W-M8-90

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)	Surface Treatment	Sales Unit	Thread Length (mm)
₹ 4,217.00	100 Pieces Per Package	1 Pack(s)		14 Day(s) or more	10	10	40	[Trivalent Chromate] Trivalent White	Box/package	26
₹ 4,413.60	90 Pieces Per Package	1 Pack(s)		5 Day(s) or more	10	10	45	[Trivalent Chromate] Trivalent White	Box/package	26
₹ 4,270.40	75 Pieces Per Package	1 Pack(s)		5 Day(s) or more	10	10	55	[Trivalent Chromate] Trivalent White	Box/package	26
₹ 129.00		1 Piece(s)	Available	5 Day(s) or more	10	8	80	[Trivalent Chromate] Trivalent White	Low Quantity (can be purchased from one)	30
₹ 11,610.00	90 Pieces Per Package	1 Pack(s)		5 Day(s) or more	10	8	85	[Trivalent Chromate] Trivalent White	Box/package	30
₹ 148.00		1 Piece(s)	Available	5 Day(s) or more	10	8	90	[Trivalent Chromate] Trivalent White	Low Quantity (can be purchased from one)	30

Part Number

Part Number	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)	Surface Treatment	Sales Unit	Thread Length (mm)

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