These 4-40 brass set screws are used to lock the king pin in the steering block. The softer brass material prevents damage to the hardened king pin.
91864A032, Alloy Steel Socket Head Screws
BrassCraft 1/2 in. Nom Comp Inlet x 3/8 in. O.D. Comp x 1/4 in. O.D. Comp Dual Outlet Dual Shut-Off Multi-Turn Straight Valve CR1900DVSX R - The Home Depot
This multi-purpose hardware can be used to panel mount D-sub adapters and connectors. Screwlock body length of .232 with 4-40 female threads, male
4-40 D-Sub Hardware Jack Screw Kit, .40 inch Thread, .232 inch
Sargent 13-0074 Rim Cylinder Connecting Screw, 2-1/8 inch Long
Sigma ProConnex 3/4-in Electrical (EMT) Zinc-plated Steel Set Screw Connector Conduit Fittings in the Conduit Fittings department at
Machine screws are especially useful with small hinges (#2 and #4 screws). The other sizes are equally useful in hardware installation, construction
Flat-Head Slot Brass Machine Screws
Brands - Calandra Racing Concepts - Small Addictions RC
Zinc Plated Metal Screw, Wafer Head, Square Drive, Self-Tapping
#4-40 UNC 12.9 Grade Alloy Steel Hex Socket Head Cap Screws Assortment Set,160-piece : Industrial & Scientific
3/4 #3 Flat-Head Brass Screws - Lee Valley Tools