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Cross-Head Pan Head Screws I = 4 (Spring Lock Washer + ISO Small Captive Washer) Small Screws【1-7,000 Pieces Per Package】 (CSPPNZI-ST3B-M4-45)

Cross-Head Pan Head Screws I = 4 (Spring Lock Washer + ISO Small Captive Washer) Small Screws CSPPNZI-ST3B-M4-45
Check FAQ of this product (7 items)

SUNCO

SUNCO

A spring and small flat washer are embedded in the pan head screw with a shape that prevents them from falling off.

Part Number

Configured Part Number is shown.

CSPPNZI-ST3B-M4-45

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45
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  1. 1
Part Number
CSPPNZI-ST3B-M4-45
Part NumberStandard Unit PriceNumber of pc(s). included in pkg.Minimum order quantityVolume DiscountDays to ShipRoHSNominal of Thread (M) Length L (mm)
(mm) 		Material Surface Treatment Pitch
(mm) 		Unit of Purchase Additional Shape

MYR 224.75

400 Pieces Per Package

1 Pack(s) 5 Day(s) or more 10445[Steel] SWCH Equivalent[Trivalent Chromate] Trivalent Black0.7Box/packageWasher Included

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  1. 1

Basic Information

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

Please check the type/dimensions/specifications of the part CSPPNZI-ST3B-M4-45 in the Cross-Head Pan Head Screws I = 4 (Spring Lock Washer + ISO Small Captive Washer) Small Screws series.

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Specification/Dimensions

  • type

    • 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

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  • Material

    • Steel
      • SWCH Equivalent
    • Stainless Steel
      • Equivalent to SUS304
    • Brass

    Clear

  • Surface Treatment

    • Not Provided
      • Fabric
    • 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
      • 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

  • Additional Shape

    • Washer Included

    Clear

  • CAD

    • 2D
    • 3D

    Clear

Days to Ship

    • All
    • 2 Day(s) or Less
    • 5 Day(s) or Less
    • 13 Day(s) or Less
    • 14 Day(s) or Less
    • 43 Day(s) or Less

    Clear

Specify Alterations

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

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