S-90275A561 1/4"-28 x 1" ASME B18.6.3 Steel Slotted Flat Head Screws
Steel Slotted Flat Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
- Precise flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
- High tensile strength rating of 60,000 psi ensures reliable performance under substantial mechanical loads
- Fine thread spacing provides enhanced grip and vibration resistance in precision assemblies
- Class 2A thread fit guarantees consistent, reliable engagement with standard UNF threaded components
- Full threading along the 1" length enables maximum adjustment flexibility and holding power
- Industry compliance with ASME B18.6.3 standards ensures dimensional accuracy and interchangeability
Professional Applications & Engineering Value
These 1/4"-28 UNF flat head slotted screws deliver exceptional engineering value in industrial fastening applications where surface flushness and corrosion resistance are critical. The zinc-plated steel construction provides reliable protection against environmental factors, while the fine thread spacing and Class 2A thread fit ensure precise, secure connections that resist loosening under vibration. The 82° countersink angle allows for seamless integration into machinery, automotive components, and electronic enclosures, eliminating protrusions that could interfere with moving parts or aesthetic requirements. With Rockwell B70 hardness and 60,000 psi tensile strength, these fully threaded screws maintain structural integrity in high-stress applications, making them ideal for precision manufacturing, equipment assembly, and maintenance operations requiring dependable, long-lasting fastening solutions.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 specifications, these flat head screws feature Class 2A thread fit tolerance for reliable engagement with standard UNF threaded components. The inch-system measurements ensure dimensional accuracy with 1/4"-28 UNF fine thread configuration and 82° countersink angle. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental responsibility and safe use across various industrial sectors.
