S-91781A722 1/2"-13 x 2 1/2" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws
Stainless Steel Slotted Flat Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 Stainless Steel and passivated finish for extended service life in harsh environments
- High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration
- Precision Class 2A thread fit provides smooth assembly and consistent clamping force
- 82° countersink angle and flat head design enables flush mounting for improved aesthetics and safety
- Coarse UNC threading offers faster installation and reduced cross-threading risks
- Partial threading configuration allows for optimal grip length and material savings
- Full compliance with ASME B18.6.3 guarantees dimensional accuracy and interchangeability
Professional Applications & Engineering Value
These 1/2"-13 UNC flat head screws deliver exceptional engineering value across industrial applications where corrosion resistance, strength, and precise flush mounting are critical. The 18-8 stainless steel construction with passivated finish provides superior protection against chemical exposure and atmospheric corrosion, making them ideal for marine equipment, food processing machinery, and outdoor structures. The partially threaded design concentrates thread engagement where needed most, reducing material usage while maintaining secure fastening. With their 82° countersink angle and flat head profile, these screws sit perfectly flush with surfaces, eliminating protrusions that could snag or create safety hazards in conveyor systems, machinery guards, and structural assemblies.
Specification Summary & Compliance
Manufactured to exact ASME B18.6.3 specifications with Class 2A thread fit for consistent dimensional accuracy. Features 1/2"-13 UNC coarse threads in right-hand direction with minimum thread length of 1-1/2". Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards for environmental safety. Material hardness rated at Rockwell B80 with 80,000 psi tensile strength.
