S-91240A078 1/4"-28 Fed. Spec. FF-N-836, MS35650-3254, Fed. Spec. QQ-P-35 Hex Nuts
Hex Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance from 18-8 Stainless Steel construction, ensuring long-term reliability in harsh environments
- Precise Class 2B thread fit for smooth assembly and secure fastening without cross-threading risks
- Fine UNF threading (1/4"-28) delivers higher tensile strength and vibration resistance compared to coarse threads
- Standard external hex drive profile enables easy installation with common wrench tools
- Compliance with multiple federal specifications (FF-N-836, MS35650-3254) guarantees consistent quality and interchangeability
- Environmental regulation compliance with RoHS 3 and REACH standards for safe global usage
- Compact dimensions (7/16" width × 3/16" height) provide space-efficient solutions without compromising strength
Professional Applications & Engineering Value
This 18-8 Stainless Steel hex nut with UNF fine threading addresses critical challenges in precision assembly applications. The Class 2B thread fit ensures consistent engagement with mating components, preventing loosening under vibration in machinery, automotive, and aerospace systems. The corrosion-resistant properties of 18-8 stainless steel make it ideal for marine environments, food processing equipment, and outdoor installations where moisture exposure is common. Meeting Fed. Spec. FF-N-836 and MS35650-3254 standards, this external hex drive nut provides reliable performance in high-stress applications while maintaining dimensional accuracy across production batches. The right-hand thread direction follows industry conventions for straightforward installation and maintenance procedures.
Specification Summary & Compliance
Manufactured to precise Class 2B thread tolerances with 1/4"-28 UNF fine threads in right-hand direction. Complies with Fed. Spec. FF-N-836, MS35650-3254, and QQ-P-35 manufacturing standards. Features standard hex nut profile with 7/16" width and 3/16" height. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for hazardous substance restrictions.
