• Special Screws
  • High Performance S.S. Screws


Hex Socket Head Cap Screws - High Intensity S.S.

  • Heat-resistance
  • Chemical-proof
  • Nonmagnetic
  • High strength

Dimension Drawing

SNSX-88Hex Socket Head Cap Screws - High Intensity S.S.寸法図

Unit : mm

Part Number M (Coarse)
Nominal of Thread
Pitch L Strength Class D1 L1 B L2 Mass
SNSX-M3-16-88 M3 0.5 16 8.8 5.5 3 2.5 Full Thread 1.2 2.63 CAD Cart

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Main Body SUS316L HiMo
Strength Class 8.8


FPD production equipment, semiconductor devices, sputtering
equipment, aquatic applications, and general industrial machines


  • High intensity socket head cap screws are made of stainless steel. (Strength Class 8.8 or 10.9)
  • For applications that require both high strength and corrosion resistance.
  • High strength per a screw is useful for space and weight saving by decreasing thread diameter and number.
  • Screws with excellent heat resistance and corrosion resistance.
  • Nonmagnetic.

Mechanical Properties

Part Number・Strength Class\Property Tensile Strength
0.2% Proof Stress
Elongation after Break Minimum
A2-50・A4-50 500 210 0.6d
A2-70・A4-70 700 450 0.4d
SNSX-888.8 800 640 0.3d
SNSX-10910.9 1,000 900 0.2d

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

Result of corrosion test by metal materials

SUS316L HiMo steel used in SNSX is a special steel alloy with reduced carbon and increased Cr, Ni, and Mo. Reducing carbon shows an increased resistance to grain boundary corrosion cracking, and adding Cr and Mo increases resistance to pitting corrosion and crevice corrosion. In addition, adding Ni effectively reduces the risk of stress corrosion cracking.
The chart below shows the degree of corrosion after 10 years of exposure to conditions similar to seawater environment, and there was no corrosion for CR3 or lower.

SNSX-88Hex Socket Head Cap Screws - High Intensity S.S.

Sulfuric acid corrosion test (H2SO4, 50°C and mm / year)

Part Number・Material\Density 3% 10% 20%
SUS304 1.08 3 -
SUS316、SUS316L 0 0.3 1.3
SNSX-88 SNSX-109 0 0 0.44

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

Magnetic Permeability Comparison

Part Number / Material Magnetic Permeability
SNSX-88SUS316L HiMo 1.006
SNSX-109SUS316L HiMo 1.007
SNSL SUS316L 1.006
SUSXM7 1.4

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

Product List

Click here to see SNSX-M3-88

Click here to see SNSX-88