PRECISION 3/8 -24 UNF FINE THREAD：Specifically engineered with 24 TPI (Threads Per Inch) for fine-thread applications. These UNF hex nuts offer superior thread engagement and a tighter grip compared to standard coarse threads, making them ideal for high-precision adjustments and critical mechanical assemblies. PREMIUM 18-8 (304) STAINLESS STEEL：Crafted from authentic 304 stainless steel for lasting durability. These nuts provide excellent rust resistance (Corrosion Resistant), ensuring a clean and reliable connection in both high-moisture indoor settings and demanding outdoor environments. ENHANCED VIBRATION RESISTANCE：The fine thread design inherently provides better resistance to loosening caused by vibration. Whether you are securing moving engine parts or performance racing components, Zerdans hex nuts stay tight where standard fasteners might fail. SMOOTH, BURR-FREE MACHINING：Each nut is meticulously polished to ensure a flaw-free surface and clean internal threading. This precision finish prevents galling during installation and ensures a professional look for your high-end DIY or restoration projects. VALUE PACK FOR SPECIALIZED REPAIRS：This 15-piece set is the perfect quantity for specialized repairs or custom builds, saving you from purchasing expensive bulk quantities. Securely packaged to ensure every piece arrives in perfect condition. Note: Please verify your bolt is 3/8 -24 (Fine) and not 3/8 -16 (Coarse) before ordering. UPC 750656228081 ASIN B0DJ27CYC2 Brand ZerDans Color Silver Set Name 15Pcs Size Name 15Pcs-3/8 - 24 Metal Type Stainless Steel Unit Count 15 Count Part Number ZD-3/8 - 24 Hex Nuts Thread Size 3/8 -24 Thread Type Unified National Fine (Unf) Finish Types Stainless Steel Grade Rating industrial Manufacturer Zerdans Thread Class Fine Thread Style Right Hand Fastener Type Hex Item Diameter 0.38 inches Material Type Stainless Steel Item Highlight UNF Thread, Rust Resistant, For Machinery, Automotive & DIY Projects, Storage Case Included Exterior Finish Stainless Steel Item Dimensions 5.5 x 4 x 0.65 inches Number Of Items 15 Thread Coverage Partially Threaded Number of Pieces 15 Outside Diameter 0.38 inches Screw Head Style Hexagonal Inside Thread Size 3/8 Compatible Groove Diameter 0.38 inches