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Cross-recessed (+) pan head I=4 (SW + ISO compact W assembly) machine screw【1-7,000 Pieces Per Package】 (CSPPNZI-ST3B-M4-8)

Cross-recessed (+) pan head I=4 (SW + ISO compact W assembly) machine screw CSPPNZI-ST3B-M4-8

Volume Discount

Check FAQ of this product (7 items)

SUNCO

A spring washer and a compact plain washer are fitted to the pan head screw to prevent it from coming loose.

(i)Caution

The product images are representative only. Specifications may vary by part number, including shape and color.

Part Number

Configured Part Number is shown.

CSPPNZI-ST3B-M4-8

Product Specifications
Part Numbers

Drawing

Cross-recessed (+) pan head I=4 (SW+ISO compact W assembly) machine screw external shape diagram

Specifications Table

Nominal thread size	Machine Screw Main Body					Plain washer D1XT	Spring lock washer	a
	dk		k	Cross-recessed			d1 (Maximum)
	dk		k	Cross-recessed number	m (Reference)		d1 (Maximum)
M2	3.5	0 -0.4	1.3 +/- 0.1	1	2.2	4.3 x 0.3	4	2.1
M2.3	4	0 -0.4	1.5 +/- 0.1	1	2.4	4.6 x 0.5	4.6	2.5
M2.5	4.5	0 -0.4	1.7 +/- 0.1	1	2.6	5 x 0.5	4.8	2.7
M2.6	4.5	0 -0.4	1.7 +/- 0.1	1	2.6	5 x 0.5	4.8	2.7
M3	5.5	0 -0.5	2 +/- 0.15	2	3.6	6 x 0.5	5.5	3.0
M3.5	6	0 -0.5	2.3 +/- 0.15	2	3.9	7 x 0.5	6.2	3.4
M4	7	0 -0.5	2.6 +/- 0.15	2	4.2	8 x 0.8	7	4.4
M5	9	0 -0.6	3.3 +/- 0.15	2	4.9	10 x 1.0	8.5	5.4
M6	10.5	0 -0.7	3.9 +/- 0.2	3	6.3	11.5 x 1.6	11.5	6.9
M8	14	0 -0.8	5.2 +/- 0.2	3	7.8	15.5 x 1.6	14.5	8.4

: 30; 45; 60

Part Number
CSPPNZI-ST3B-M4-8

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) (mm)	Material	Surface Treatment	Pitch (mm)	Unit of Purchase	Application	Additional Shape	Screw M Diameter	Size (X notation) (mm)	Size (- notation) (mm)	Standard Name (Material)
	MYR 226.73	1,300 Pieces Per Package	1 Pack(s)	Available	5 Day(s) or more	10	4	8	[Steel] SWCH Equivalent	[Trivalent Chromate] Trivalent Black	0.7	Box/package	Standard	Washer Included	-	-	-	-

Basic Information

Mounting Hole Shape	Cross-Head	Detailed Shape	Pan	Basic Shape	Standard (Round)
Thread Type	Metric coarse	Tip Shape	Flat End

Please check the type/dimensions/specifications of the part CSPPNZI-ST3B-M4-8 in the Cross-recessed (+) pan head I=4 (SW + ISO compact W assembly) machine screw series.

Configure

1 Part Numbers

View Part Numbers

Configure Remaining Specifications

Completed

Specification/Dimensions

type
- CSPPNZI
- CSPPNZI-BR-M
- CSPPNZI-BRH-M
- CSPPNZI-BRN-M
- CSPPNZI-ST-M
- CSPPNZI-ST3B-M
- CSPPNZI-ST3W-M
- CSPPNZI-STC-M
- CSPPNZI-STCB-M
- CSPPNZI-STCNW-M
- CSPPNZI-STGCU-M
- CSPPNZI-STH-M
- CSPPNZI-STN-M
- CSPPNZI-STNB-M
- CSPPNZI-STU-M
- CSPPNZI-SUS-M
- CSPPNZI-SUSTBS-M
Clear
Nominal of Thread (M)
2

2.3

2.5

4

6

8
Clear
Length L (mm)(mm)
4

5

6

7

8

9

10

12

14

15

16

18

20

21

22

25

28

30

35

40

45

50

55

60

65

70
Clear
Material
- Steel
  - SWCH Equivalent
  - Steel
- Stainless Steel
  - Equivalent to SUS304
  - Stainless Steel
- Brass
Clear
Surface Treatment
- Not Provided
  - Fabric
  - No
- Chromium free
  - Chrome Plating White
- Trivalent Chromate
  - Trivalent Black
  - Trivalent White
- Bright Chrome Plating
  - Bright Chromate Plating
- Chromate Plating
  - Black Chromate
  - Chromate Plating
- Nickel Plating
  - Black nickel
  - Nickel Plating
- Copper Plating
  - CU Plating
- Black Paint
  - Black Paint
Clear
Pitch(mm)
0.4

0.45

0.7

1

1.25
Clear
Unit of Purchase
Low Quantity (can be purchased from one)

Box/package
Clear
Application
- Standard
Clear
Additional Shape
- Washer Included
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

2 Day(s) or Less

5 Day(s) or Less

10 Day(s) or Less

13 Day(s) or Less

14 Day(s) or Less

22 Day(s) or Less

43 Day(s) or Less
Clear

Specify Alterations

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 is the advantage of using pan head screws with an integrated spring lock washer and captive washer?: Answer: The integration of a spring lock washer and ISO small captive washer into the pan head screw design provides two main advantages:
•Prevention of washer loss during handling or transportation
•Faster and more efficient assembly, especially in automated or high-speed production environments.
This design eliminates the need to manually position washers, improving both convenience and consistency during fastening.
Question: What makes cross head screws ideal for precision fastening applications?: Answer: Cross head screws (also known as Phillips head screws) are designed for controlled torque application, reducing the risk of over-tightening or slippage. This makes them ideal for small screws used in electronics, precision instruments, and modular assemblies, where consistent fastening is critical.
Question: How does the spring lock washer help in maintaining long-term fastening stability?: Answer: The spring lock washer applies continuous tension against the mating surface, which helps resist loosening caused by vibration, thermal expansion, or minor shifting. In applications where fasteners are subjected to repetitive motion or varying temperatures, this built-in washer significantly enhances reliability.
Question: Can these small screws be used in automated assembly lines?: Answer: Yes, these small screws are especially suitable for automated assembly. The captive washer design ensures the components remain attached to the screw, eliminating the need for extra parts handling by the machine. This reduces pick-and-place errors and increases efficiency in robotic systems or conveyor-based production.
Question: What materials are available for these cross head pan head screws, and how should I choose one?: Answer: The screws are available in Steel (SWCH equivalent), Stainless Steel (SUS304 equivalent), and Brass.
•Use Steel for general mechanical fastening where strength is prioritized.
•Stainless Steel is ideal for corrosion-resistant applications or outdoor environments.
•Brass offers excellent conductivity and is typically used in electrical and low-friction applications.
Question: How do the available surface treatments improve screw performance?: Answer: Surface treatments provide enhanced protection, durability, and aesthetic appeal. For example:
•Nickel plating improves wear resistance and conductivity.
•Trivalent chromate (black, white) provides corrosion resistance without using hazardous hexavalent chromium.
•Black paint offers basic surface protection with a low-reflective finish, commonly used in consumer electronics.
Choosing the right finish depends on environmental conditions, electrical conductivity requirements, and appearance preferences.
Question: Are these pan head screws reusable after disassembly?: Answer: In most cases, yes. The pan head screws with integrated spring lock washers and captive washers can be reused if the threads are not damaged and the washers retain their shape. However, if the spring lock washer has flattened or deformed due to prolonged compression or over-torquing, replacement is recommended to ensure continued vibration resistance and holding strength.

Check other FAQ (4 items) Hide

Products like this...

Part Number
CSPPNZI-BRN-M2-6
CSPPNZI-BRN-M2-8
CSPPNZI-BRN-M2.3-6
CSPPNZI-ST3B-M6-10
CSPPNZI-ST3B-M6-12
CSPPNZI-ST3B-M6-14

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) (mm)	Material	Surface Treatment	Pitch (mm)	Unit of Purchase	Application	Additional Shape	Screw M Diameter	Size (X notation) (mm)	Size (- notation) (mm)	Standard Name (Material)
MYR 912.53	5,000 Pieces Per Package	1 Pack(s)	Available	5 Day(s) or more	10	2	6	Brass	[Nickel Plating] Nickel Plating	0.4	Box/package	Standard	Washer Included	-	-	-	-
MYR 1,183.96	5,000 Pieces Per Package	1 Pack(s)		10 Day(s) or more	-	2	8	Brass	[Nickel Plating] Nickel Plating	0.4	Box/package	-	Washer Included	M2	M2X8	M2-8	Brass
MYR 1,747.75	4,000 Pieces Per Package	1 Pack(s)	Available	5 Day(s) or more	10	2.3	6	Brass	[Nickel Plating] Nickel Plating	0.45	Box/package	Standard	Washer Included	-	-	-	-
MYR 227.62	400 Pieces Per Package	1 Pack(s)	Available	5 Day(s) or more	10	6	10	[Steel] SWCH Equivalent	[Trivalent Chromate] Trivalent Black	1	Box/package	Standard	Washer Included	-	-	-	-
MYR 204.19	350 Pieces Per Package	1 Pack(s)	Available	5 Day(s) or more	10	6	12	[Steel] SWCH Equivalent	[Trivalent Chromate] Trivalent Black	1	Box/package	Standard	Washer Included	-	-	-	-
MYR 179.08	300 Pieces Per Package	1 Pack(s)	Available	5 Day(s) or more	10	6	14	[Steel] SWCH Equivalent	[Trivalent Chromate] Trivalent Black	1	Box/package	Standard	Washer Included	-	-	-	-

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Cross-recessed (+) pan head I=4 (SW + ISO compact W assembly) machine screw【1-7,000 Pieces Per Package】 (CSPPNZI-ST3B-M4-8)

(i)Caution

Drawing

Specifications Table

Basic Information

Configure

Specification/Dimensions

type

Nominal of Thread (M)

Length L (mm)(mm)

Material

Surface Treatment

Pitch(mm)

Unit of Purchase

Application

Additional Shape

CAD

Days to Ship

Specify Alterations

Frequently asked question (FAQ)

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