{"product_id":"stainless-steel-hex-set-grub-screw-assortment-m3-m8-250pcs","title":"Stainless Steel Allen Hex Set Grub Screw Assortment – M3\/M4\/M5\/M6\/M8 Cup Point 250pcs","description":"\u003ch2\u003eStainless Steel Allen Hex Set Grub Screw Assortment – M3\/M4\/M5\/M6\/M8 Cup Point, 250pcs\u003c\/h2\u003e\n\n\u003cp\u003eA comprehensive assortment of A2 stainless steel hex socket set screws (grub screws) in the five most commonly used metric sizes: M3, M4, M5, M6, and M8. Cup point geometry provides positive grip on shaft surfaces without the shaft damage associated with cone or dog point screws. Supplied in a segmented plastic storage box for organized access on the workbench or in the field.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e DIN 916 \/ ISO 4029 (hex socket cup point set screw)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e A2 stainless steel (304 SS \/ 18-8) — corrosion resistant\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive:\u003c\/strong\u003e Hex socket (Allen key \/ hex wrench)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Style:\u003c\/strong\u003e Cup point — shallow cup indent grips shaft without deep penetration\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSizes Included:\u003c\/strong\u003e M3, M4, M5, M6, M8 (multiple lengths per size)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTotal Quantity:\u003c\/strong\u003e 250 pieces\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e Metric coarse pitch (M3×0.5, M4×0.7, M5×0.8, M6×1.0, M8×1.25)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e A2-70 (700 MPa tensile strength)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Segmented plastic box with labeled compartments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCup Point vs Other Set Screw Point Styles\u003c\/h3\u003e\n\u003cp\u003eSet screws are available in multiple point geometries. Choosing the wrong point style causes shaft damage or inadequate holding force:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCup point (this product):\u003c\/strong\u003e Most common. The shallow cup rim bites into the shaft surface for positive grip. Leaves a small circular mark but does not deeply gouge. Best for general-purpose shaft locking where occasional repositioning is needed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCone point:\u003c\/strong\u003e Tapered point penetrates deeply into a pre-drilled dimple on the shaft. Maximum holding force. Permanent or semi-permanent applications only — difficult to remove without shaft damage.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlat point:\u003c\/strong\u003e No penetration. Used on hardened shafts or where zero shaft marking is required. Lower holding force — relies on friction only.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDog point (half-dog):\u003c\/strong\u003e Cylindrical stub that locates into a drilled hole in the shaft. Provides positive angular and axial location. Used in precision indexing applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOval point:\u003c\/strong\u003e Rounded tip for use against soft materials or where repeated adjustment is needed without shaft damage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat Questions Does This Product Answer?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cem\u003e\"What size Allen key do I need for M4 set screws?\"\u003c\/em\u003e — M4 DIN 916 uses a 2mm hex key. M3=1.5mm, M5=2.5mm, M6=3mm, M8=4mm.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cem\u003e\"Can I use stainless steel set screws on a steel shaft?\"\u003c\/em\u003e — Yes, but note that A2 SS (304) is softer than hardened steel shafts. For high-torque applications on hardened shafts, consider Grade 12.9 alloy steel set screws instead.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cem\u003e\"What is the difference between a set screw and a grub screw?\"\u003c\/em\u003e — They are the same fastener. \"Set screw\" is the North American term; \"grub screw\" is the British\/Australian term. Both refer to a headless screw driven entirely below the surface.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cem\u003e\"How tight should I torque an M6 set screw?\"\u003c\/em\u003e — Typical torque for M6 A2 SS cup point: 4–6 Nm. Always use a calibrated torque wrench for precision applications; over-tightening strips the hex socket.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCNC \u0026amp; machining:\u003c\/strong\u003e Locking pulleys, sprockets, and gears to motor shafts; securing tool holders and collet nuts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3D printing:\u003c\/strong\u003e Locking GT2 pulleys and drive gears to stepper motor shafts (M3 most common)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShaft collars \u0026amp; couplings:\u003c\/strong\u003e Securing flexible shaft couplings, encoder discs, and bearing collars\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRobotics \u0026amp; automation:\u003c\/strong\u003e Locking servo horn adapters, lead screw nuts, and linear rail carriages\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine \u0026amp; outdoor:\u003c\/strong\u003e A2 stainless resists salt spray and moisture — suitable for marine hardware, outdoor enclosures, and garden equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eA2 vs A4 Stainless Steel — Which Do You Need?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eA2 (304 SS):\u003c\/strong\u003e Standard stainless. Excellent corrosion resistance in most environments. Not suitable for continuous saltwater immersion or chlorinated environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eA4 (316 SS):\u003c\/strong\u003e Marine-grade stainless. Contains molybdenum for superior resistance to chlorides and saltwater. Required for offshore, coastal, and chemical processing applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cp\u003e250 pieces total — M3, M4, M5, M6, M8 stainless steel hex socket cup point set screws in assorted lengths, supplied in labeled plastic storage box.\u003c\/p\u003e","brand":"Cable Parts Online","offers":[{"title":"pointed \/ 1 BOX","offer_id":47850809196789,"sku":"14:29#pointed;380:201442015#1 BOX","price":44.8,"currency_code":"USD","in_stock":true},{"title":"pointed \/ 5 BOXES","offer_id":47850809262325,"sku":"14:29#pointed;380:201336456#5 BOXES","price":190.4,"currency_code":"USD","in_stock":true},{"title":"pointed \/ 10 BOXES","offer_id":47850809229557,"sku":"14:29#pointed;380:201336457#10 BOXES","price":358.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3494\/0149\/files\/Sfb81daa5e9e04d629239b73845b6280et.webp?v=1773899692","url":"https:\/\/www.csldmcml.com\/products\/stainless-steel-hex-set-grub-screw-assortment-m3-m8-250pcs","provider":"Cable Parts Online","version":"1.0","type":"link"}