M20 Carbon Steel Flat Washer 5pcs 21x38x10.5mm Grade 8.8 Alloy Steel Fasteners 78.1-66.1mm 5pcs x Compression Spring

5pcs x Compression Spring

Outer Dia : 27mm/1

Bore Diameter (d): 90mm

Folded Size: 45 x 36 x 15mm / 1

* Input Voltage Range: 18-36V DC

M20 Carbon Steel Flat Washer 5pcs 21x38x10.5mm Grade 8.8 Alloy Steel Fasteners 78.1-66.1mm 5pcs x Compression SpringMade of black oxidized carbon steel, which has the characteristics of good cutting performance, high hardness, good toughness and wear resistance after quenching and tempering treatment. The flat washer is commonly used to distribute loads of threaded bolts, screws, and nuts evenly as the fastener is tightened. Intended for general use under the head of a bolt or nut across the area of the support in order to provide a smooth surface and prevent pull