These are the 3 x 37.5mm Screw Hinge Pins from Arrma. 

FEATURES: 

Steel construction Used on the Arrma Raider, Fury, ADX-10, Vortex, Granite and Fury to hold the inner part of the front suspension arms in place

INCLUDES: 

Two 3 x 37.5mm Screw Hinge Pins 

FITS IN: 
FURY / VORTEKS MEGA / FURY MEGA / RAIDER BLS / 
VORTEKS BLS / GRANITE BLS / FURY BLS