• Special Screws
  • Special Material Fasteners


Hex Socket Head Cap Screws - Super Invar

  • Cleanroom Specification

Dimension Drawing

SNSIVHex Socket Head Cap Screws - Super Invar寸法図



M (Coarse)
Nominal of Thread

Unit : mm

Part Number M (Coarse)
Nominal of Thread
Pitch L D1 L1 B Tension Rupture
Load (N)*1
Qty per Pack Mass
CAD Standard
SNSIV-M4-12 M4 0.7 12 7 4 3 4120 1 2 39.49 CAD Cart

*1: Values in chart are for reference only. They are not guaranteed values.

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Main Body Super Invar


Precision and measurement instruments


  • Super Invar is a special alloy with an extremely low linear expansion coefficient, and its dimensions change very little due to temperature.
  • For measurement and precision instruments which do not allow changes in dimensions due to thermal expansion.
  • For Prevention from loosening and damage due to differences in thermal expansion.
  • Linear Expansion Coefficient:
    0.69×10-6(K-1)(30 deg C - 100 deg C)

Physical Property

Super Invar SUS304
Specific Gravity 8.15 7.93
Longitudinal Elastic Modulus(GPa) 132 193
Electric Resistance(μΩ・m) 0.77 0.7
Thermal Conductivity(W/(m・K)) 10.47 17
Linear Expansion Coefficient(K-1 0.69×10-6 17.3×10-6

Values in chart are for reference only. They are not guaranteed values.

Mechanical Properties

Super Invar SUS304
Tensile Strength(N/mm2 470 520 or Higher
0.2% Proof Stress(N/mm2 333 205 or Higher
Elongation(%) 43 40 or Higher
Hardness(HV) 143 200 or Less

Values in chart are for reference only. They are not guaranteed values.

Customer Service

  • Usage Method
  • Technical Question
  • Customization Products

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