Value Collection 3RSMSF94C300 Flat Head Machine Screw

Product Description

The VALUE COLLECTION 3RSMSF94C300 is a brass flat head slotted machine screw sized 1/4-20 x 3 inches overall length. It is manufactured to ASME B18.6.3 standards, which governs dimensional and mechanical requirements for inch-series machine screws. The flat head profile sits flush with or below the mating surface when countersunk correctly, making it a practical choice in assemblies where a smooth exterior face is required. The slotted drive is compatible with standard flat-blade screwdrivers. This fastener is sold individually and requires a minimum order quantity of 10 pieces.

This screw is suited for general mechanical assembly, light structural fastening, and equipment maintenance across a range of trade applications. Brass construction makes it appropriate for use in environments where corrosion resistance, low magnetic permeability, or non-sparking characteristics are needed. It is commonly used in plumbing, electrical panel work, HVAC equipment enclosures, and marine or humid-environment assemblies where ferrous fasteners are not preferred.

Key Features

• 1/4-20 unified coarse thread for broad compatibility with standard tapped holes and nuts
• 3-inch overall length with full 3-inch length under head — no shoulder or shank reduction
• Flat head profile designed for countersunk installations requiring a flush finish
• Slotted drive accepts standard flat-blade screwdrivers — no specialty tooling required
• Brass material provides corrosion resistance and non-magnetic, non-sparking properties
• Conforms to ASME B18.6.3 inch-series machine screw standard

Compatibility

Designed for use in any application requiring a 1/4-20 threaded flat head machine screw per ASME B18.6.3 in brass. Fits standard 1/4-20 tapped holes and hex nuts without modification.

Installation Notes

Installation is performed with a flat-blade screwdriver sized to the slot. The mating material should be pre-tapped or fitted with a compatible 1/4-20 nut; do not force threads into undersized holes. When countersinking for a flush finish, match the countersink angle to the flat head angle to avoid cracking the brass head under torque. De-energize and isolate any electrical or mechanical systems before replacing fasteners in live equipment.