WZZG 20PCS Miniature Ball Bearings 684 Open 684ZZ 2RS Double Shroud Seal Stainless Steel 4*9*4mm 4*9*2.5mm 4*9*3.5mm Bearings

WZZG miniature bearings 684ZZ 684-2RS 684K S684K S684ZZ S684-2RS 684W2.5-ZZ 684W3.5-ZZ

echnical Specifications

Type: single row deep groove ball bearing

Model and size:

684-ZZ :   4*9*4mm

684-2RS:  4*9*4mm

S684-ZZ :  4*9*4mm

S684-2RS: 4*9*4mm

684K :    4*9*2.5mm

S684K :   4*9*2.5mm

684W2.5 : 4*9*2.5mm

684W3.5 : 4*9*3.5mm

Material: 52100 Chrome Steel/440C Stainless steel

Seal Type:ZZ (double-sided metal seal)

2RS(double-sided rubber seal)

K(Open)

Quantity: 20 pieces