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Screws / Spring plungers

Shoulder Screws

Material: high grade alloy steel ISO 12.9
Hardness: 37รท43 HRC
Tensile strength: Rm = 1200 N/mm2 min
Yield strength: Rp 0,2 = 1080 N/mm2 min.
Shear strength: Tm = 720 N/mm2 min.
Elongation: A = 8% min.
Impact test:KCU 15J min. KCU 15J min.

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Ground Spacer Sleeve Shoulder Screws

Cap screw: steel class 12.9 UNI 5931 DIN 912
Cup washer: hardened and tempered steel, not ground; tensile strength 100 Kg/mm2
Spacer sleeve: hardened, tempered and ground steel; tensile strength 120 - 140 Kg/mm2

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Spring Plugers

Material: Steel class 5.8
Surface treatment: Black oxidation
Ball: Hardened and polished stainless steel

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E-mail info@specialsprings.com

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