HVAZI #4-40 UNC Stainless Steel Phillips Flat Head Machine Screws Nuts Kit

HVAZI #4-40 UNC Stainless Steel Phillips Flat Head Machine Screws Nuts Kit

• All‑in‑One 220PCS #4‑40 UNC Phillips Flat‑Head Machine‑Screw & Hex‑Nut Assortment:This kit consists of full‑thread #4‑40 UNC Phillips countersunk‑head machine screws in 9 inch sizes plus matching hex nuts, total 220‑pieces: ‑ Screws: #4‑40×3/16", 1/4", 5/16", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 20pcs for each length ‑ Hex Nuts: #4‑40 UNC, 40pcs Screw length is measured from the top of the standard 82‑degree countersunk flat‑head. Ideal for electronic equipment, instrument installation, machinery maintenance and DIY‑imperial‑hardware replacement
• Corrosion‑Resistant 304 Stainless‑Steel Construction:All machine screws and hex nuts are made of solid 304 stainless‑steel. It provides outstanding anti‑oxidation and chemical‑corrosion resistance and is mildly magnetic. Burr‑free consistent full coarse‑thread supports repeated disassembly, far more durable than carbon‑steel fasteners in damp‑indoor environments
• 82° Standard Countersunk Flat‑Head Structure:Adopts industry‑standard 82° chamfer‑bevel under‑head design. The screw sits fully flush within countersunk holes after tightening without protruding the surface. Standard Phillips cross‑drive works with regular cross screwdrivers, preventing slipping while applying torque
• 40‑TPI UNC Coarse Full‑Thread Specification:Features #4‑40 UNC 40‑threads‑per‑inch standard coarse full thread. Thread‑tooth precision is consistent, perfectly interlocked with matched #4‑40 hex nuts. It delivers stable fastening force and effectively prevents loosening caused by slight vibration for circuit boards, small‑machinery and fixtures
• ANSI‑ASME B18.6.3 Industry Standard UNC Coarse Thread:Designed to meet ANSI B18.6.3F standards. Standard UNC coarse thread provides stable locking‑force, resists loosening under minor vibration, perfectly fits tapped holes and matching imperial‑hex nuts for equipment assembly and maintenance
• Compact See‑Through Compartmentalised Plastic Storage Organizer:Equipped with lightweight transparent divided‑plastic case. Screws and hex nuts are placed in independent separated compartments for quick identification. The compact‑sized box is portable for electronic‑repair workshops, laboratory work and home DIY‑assembly projects