Overview
The 1/4-20 button head socket cap screw from MonsterBolts is a precision fastener engineered for demanding applications across automotive, machinery, and industrial assembly work. This box of 100 units features alloy steel construction with thermal black oxide coating, delivering a balance of strength and corrosion resistance. The button head design provides a low-profile head with an extended bearing surface, ideal for applications where clearance is limited or a professional appearance is required.
Key Features
- High-strength alloy steel (heat-treated 1960 series) meets ASTM F835 standards
- Thermal black oxide finish provides corrosion resistance for indoor and light outdoor use
- Button head design offers low-profile aesthetics with enhanced bearing surface
- Hex-key (Allen) socket drive for secure, tool-friendly installation
- RoHS compliant—meets environmental regulatory requirements
- Fully threaded design maximizes holding power across entire shaft length
Technical Specifications
- Thread Size: 1/4-20 UNC (coarse)
- Length: 1/2″ under head
- Material: Alloy steel (1960 series)
- Finish: Thermal black oxide
- Drive Type: Hex socket (Allen key)
- Head Style: Button head
- Thread Type: Fully threaded
- Hardness: RC 38–43
- Quantity: 100 pieces per box
- Standard Compliance: ASTM F835, RoHS
Typical Applications
- Automotive assembly and engine work
- Industrial machinery and equipment mounting
- Heavy-duty equipment fastening
- Applications requiring high tensile strength in confined spaces
- Projects where low-profile fastening and professional finish are essential
Compatibility & Replacements
Compatible With
- T-slot aluminum profiles and extrusion systems
- Machine tool assemblies and industrial equipment
- Automotive engine blocks and chassis components
- Steel and aluminum structural applications
- Standard 1/4-20 UNC threaded holes
Replaces / Drop-In Replacement For
- Generic 1/4-20 x 1/2″ button head socket cap screws
- Standard alloy steel socket cap fasteners in equivalent sizing
- Black oxide-finish button head socket caps of identical thread pitch and length
Works With
- Standard hex keys (Allen wrenches)—commonly 5/32″ size for 1/4-20
- Power socket drive bits (hex bit sockets)
- All hand and power tools compatible with hex socket fasteners
- Industrial assembly fixtures and jigs for 1/4-20 fastening
