{"product_id":"unc-2-56-4-40-6-32-8-32-a2-stainless-steel-phillips-pan-head-machine-screws","title":"UNC 2#-56 4#-40 6#-32 8#-32 Phillips Pan Head Machine Screws A2 Stainless Steel","description":"\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What material are these screws made from?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These screws are made from A2 stainless steel (equivalent to 304 SS), which provides excellent corrosion resistance, oxidation resistance, and good mechanical strength. A2 SS is the most common stainless grade for general-purpose fasteners and is suitable for indoor and most outdoor applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What thread sizes are available?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Available UNC thread sizes are #2-56, #4-40, #6-32, and #8-32. These are standard Unified National Coarse (UNC) threads used widely in American mechanical and electronic assemblies.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What lengths are available?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Available lengths vary by thread size: #2-56 comes in 3\/16\\\" to 5\/8\\\"; #4-40 in 3\/16\\\" to 1\\\"; #6-32 in 3\/16\\\" to 1-1\/2\\\"; #8-32 in 1\/4\\\" to 1-1\/2\\\". Select your size and length from the options above.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What drive style do these screws use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These screws use a Phillips (cross) drive. A #1 Phillips driver is typically used for #2 and #4 screws, while a #2 Phillips driver is standard for #6 and #8. Use the correct bit size to prevent cam-out and head damage.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between UNC and UNF threads?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"UNC (Unified National Coarse) threads have fewer threads per inch than UNF (Unified National Fine). UNC threads are faster to assemble, more tolerant of dirt and damage, and are the standard choice for general-purpose fastening in electronics, machinery, and structural assemblies.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these screws suitable for electronics and PCB assemblies?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. #2-56 and #4-40 are the most common thread sizes in electronics and PCB enclosure assemblies. A2 stainless steel is non-magnetic (in its annealed state) and corrosion-resistant, making it suitable for sensitive electronic environments.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these screws suitable for outdoor use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A2 stainless steel offers good corrosion resistance for most outdoor environments. For highly corrosive or marine environments with constant saltwater exposure, A4 (316 SS) stainless steel is generally recommended.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right pack size?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Choose 50 pcs for small projects, prototyping, or repair work. Select 100 pcs for production runs, maintenance stock, or larger assembly jobs where bulk quantity offers better per-unit value.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eUNC #2-56 #4-40 #6-32 #8-32 A2 Stainless Steel Phillips Pan Head Machine Screws — Corrosion-Resistant American Standard Fasteners\u003c\/h2\u003e\n    \u003cp\u003eFinding the right UNC stainless steel machine screw shouldn't require sourcing from multiple suppliers. Whether you're assembling electronics enclosures, securing PCB standoffs, building mechanical fixtures, or maintaining industrial equipment, having the right thread size and length in a corrosion-resistant material is critical — and hard to find in one place.\u003c\/p\u003e\n    \u003cp\u003eThese Phillips pan head machine screws are precision-formed from A2 stainless steel (304 SS equivalent), offering excellent corrosion resistance, oxidation resistance, and reliable mechanical strength. Available in four standard UNC thread sizes — #2-56, #4-40, #6-32, and #8-32 — with lengths from 3\/16\" to 1-1\/2\" depending on the diameter. Pack quantities of 50 or 100 pieces let you stock exactly what your project demands.\u003c\/p\u003e\n    \u003cp\u003eIdeal for electronics enclosures, PCB assemblies, computer hardware, HVAC equipment, automotive trim, laboratory instruments, and general mechanical assemblies requiring UNC-threaded stainless fasteners.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003e✅\u003c\/span\u003e\n    UNC thread standard · #2-56 \/ #4-40 \/ #6-32 \/ #8-32 · Phillips #1\/#2 drive · A2 stainless steel — compatible with standard UNC nuts, threaded inserts, and tapped holes · Suitable for electronics, mechanical, and industrial assemblies\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These UNC A2 Stainless Steel Phillips Pan Head Machine Screws\u003c\/h2\u003e\n  \u003cul class=\"hdiy-features\"\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eA2 Stainless Steel (304 Equivalent)\u003c\/strong\u003e — Excellent corrosion resistance, oxidation resistance, and heat resistance. Durable and rust-resistant for long-term use in demanding environments.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e \u003cstrong\u003ePrecision UNC Threading\u003c\/strong\u003e — Deep, uniform threads with consistent pitch and clear thread form. Evenly distributed fastening force reduces the risk of thread stripping and ensures a secure, reliable hold.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003ePhillips Pan Head Design\u003c\/strong\u003e — Smooth, evenly stressed cross-drive recess with a low-profile pan head. Good fastening effect with minimal cam-out risk when using the correct driver size.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💻\u003c\/span\u003e \u003cstrong\u003eElectronics-Ready Sizes (#2-56 \u0026amp; #4-40)\u003c\/strong\u003e — The two smallest thread sizes are the most common in PCB enclosures, computer hardware, and electronic instrument assemblies — stocked in stainless for corrosion-free performance.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e \u003cstrong\u003e4 Thread Sizes, Multiple Lengths\u003c\/strong\u003e — #2-56 (3\/16–5\/8\"), #4-40 (3\/16–1\"), #6-32 (3\/16–1-1\/2\"), #8-32 (1\/4–1-1\/2\") cover a wide range of fastening depths and panel thicknesses.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003e50 or 100 Pcs Packs\u003c\/strong\u003e — Choose 50 pcs for small projects and prototyping, or 100 pcs for production runs and maintenance stock. Bulk packs deliver better per-unit value.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — UNC Phillips Pan Head Machine Screws\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eA2 Stainless Steel (304 SS equivalent)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003ePan Head Machine Screw — Phillips drive\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eUNC (Unified National Coarse) — American standard\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Thread Sizes\u003c\/th\u003e\n\u003ctd\u003e#2-56 · #4-40 · #6-32 · #8-32\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e#2-56: 3\/16–5\/8\" · #4-40: 3\/16–1\" · #6-32: 3\/16–1-1\/2\" · #8-32: 1\/4–1-1\/2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eDrive Style\u003c\/th\u003e\n\u003ctd\u003ePhillips (cross) — #1 for #2\/#4, #2 for #6\/#8\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eHead Style\u003c\/th\u003e\n\u003ctd\u003ePan Head (low profile, rounded top)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eSurface Treatment\u003c\/th\u003e\n\u003ctd\u003eNatural stainless finish (untreated)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eSystem of Measurement\u003c\/th\u003e\n\u003ctd\u003eInch (Imperial)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePack Quantities\u003c\/th\u003e\n\u003ctd\u003e50 pcs \/ 100 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eElectronics enclosures, PCB assemblies, computer hardware, HVAC, automotive trim, laboratory instruments, general mechanical assemblies\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-faq\"\u003e\n    \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eWhat material are these screws made from?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese screws are made from A2 stainless steel (equivalent to 304 SS), which provides excellent corrosion resistance, oxidation resistance, and good mechanical strength. A2 SS is the most common stainless grade for general-purpose fasteners and is suitable for indoor and most outdoor applications.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eWhat thread sizes are available?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eAvailable UNC thread sizes are #2-56, #4-40, #6-32, and #8-32. These are standard Unified National Coarse (UNC) threads used widely in American mechanical and electronic assemblies.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eWhat lengths are available?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eAvailable lengths vary by thread size: #2-56 comes in 3\/16\" to 5\/8\"; #4-40 in 3\/16\" to 1\"; #6-32 in 3\/16\" to 1-1\/2\"; #8-32 in 1\/4\" to 1-1\/2\". Select your size and length from the options above.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eWhat drive style do these screws use?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese screws use a Phillips (cross) drive. A #1 Phillips driver is typically used for #2 and #4 screws, while a #2 Phillips driver is standard for #6 and #8. Use the correct bit size to prevent cam-out and head damage.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eWhat is the difference between UNC and UNF threads?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eUNC (Unified National Coarse) threads have fewer threads per inch than UNF (Unified National Fine). UNC threads are faster to assemble, more tolerant of dirt and damage, and are the standard choice for general-purpose fastening in electronics, machinery, and structural assemblies.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eAre these screws suitable for electronics and PCB assemblies?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. #2-56 and #4-40 are the most common thread sizes in electronics and PCB enclosure assemblies. A2 stainless steel is non-magnetic (in its annealed state) and corrosion-resistant, making it suitable for sensitive electronic environments.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eAre these screws suitable for outdoor use?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA2 stainless steel offers good corrosion resistance for most outdoor environments. For highly corrosive or marine environments with constant saltwater exposure, A4 (316 SS) stainless steel is generally recommended.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eHow do I choose the right pack size?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eChoose 50 pcs for small projects, prototyping, or repair work. Select 100 pcs for production runs, maintenance stock, or larger assembly jobs where bulk quantity offers better per-unit value.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your Size and Packing Qty above, then add to cart.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"2-56*3\/16 \/ 100pcs","offer_id":52260494410002,"sku":"LFL2024TENGLUOWJ04624x100","price":6.09,"currency_code":"USD","in_stock":true},{"title":"2-56*1\/4 \/ 100pcs","offer_id":52260494442770,"sku":"LFL2024TENGLUOWJ04625x100","price":6.09,"currency_code":"USD","in_stock":true},{"title":"2-56*5\/16 \/ 100pcs","offer_id":52260494475538,"sku":"LFL2024TENGLUOWJ04626x100","price":6.15,"currency_code":"USD","in_stock":true},{"title":"2-56*3\/8 \/ 100pcs","offer_id":52260494508306,"sku":"LFL2024TENGLUOWJ04627x100","price":6.09,"currency_code":"USD","in_stock":true},{"title":"2-56*5\/8 \/ 100pcs","offer_id":52260494541074,"sku":"LFL2024TENGLUOWJ04628x100","price":8.61,"currency_code":"USD","in_stock":true},{"title":"4-40*3\/16 \/ 100pcs","offer_id":52260494573842,"sku":"LFL2024TENGLUOWJ04629x100","price":6.7,"currency_code":"USD","in_stock":true},{"title":"4-40*5\/16 \/ 100pcs","offer_id":52260494606610,"sku":"LFL2024TENGLUOWJ04630x100","price":7.34,"currency_code":"USD","in_stock":true},{"title":"4-40*1\/2 \/ 100pcs","offer_id":52260494639378,"sku":"LFL2024TENGLUOWJ04631x100","price":8.55,"currency_code":"USD","in_stock":true},{"title":"4-40*5\/8 \/ 100pcs","offer_id":52260494672146,"sku":"LFL2024TENGLUOWJ04632x100","price":9.75,"currency_code":"USD","in_stock":true},{"title":"4-40*3\/4 \/ 100pcs","offer_id":52260494704914,"sku":"LFL2024TENGLUOWJ04633x100","price":10.66,"currency_code":"USD","in_stock":true},{"title":"4-40*1 \/ 100pcs","offer_id":52260494737682,"sku":"LFL2024TENGLUOWJ04634x100","price":11.49,"currency_code":"USD","in_stock":true},{"title":"6#-32*3\/16 \/ 50pcs","offer_id":52260494770450,"sku":"LFL2024TENGLUOWJ04635x50","price":5.37,"currency_code":"USD","in_stock":true},{"title":"6#-32*1\/4 \/ 50pcs","offer_id":52260494803218,"sku":"LFL2024TENGLUOWJ04636x50","price":5.07,"currency_code":"USD","in_stock":true},{"title":"6#-32*5\/16 \/ 50pcs","offer_id":52260494835986,"sku":"LFL2024TENGLUOWJ04637x50","price":5.07,"currency_code":"USD","in_stock":true},{"title":"6#-32*3\/8 \/ 50pcs","offer_id":52260494868754,"sku":"LFL2024TENGLUOWJ04638x50","price":5.48,"currency_code":"USD","in_stock":true},{"title":"6#-32*1\/2 \/ 50pcs","offer_id":52260494901522,"sku":"LFL2024TENGLUOWJ04639x50","price":6.09,"currency_code":"USD","in_stock":true},{"title":"6#-32*5\/8 \/ 50pcs","offer_id":52260494934290,"sku":"LFL2024TENGLUOWJ04640x50","price":6.76,"currency_code":"USD","in_stock":true},{"title":"6#-32*3\/4 \/ 50pcs","offer_id":52260494967058,"sku":"LFL2024TENGLUOWJ04641x50","price":7.78,"currency_code":"USD","in_stock":true},{"title":"6#-32*1 \/ 50pcs","offer_id":52260494999826,"sku":"LFL2024TENGLUOWJ04642x50","price":9.3,"currency_code":"USD","in_stock":true},{"title":"6#-32*1-1\/4 \/ 50pcs","offer_id":52260495032594,"sku":"LFL2024TENGLUOWJ04643x50","price":10.12,"currency_code":"USD","in_stock":true},{"title":"6#-32*1-1\/2 \/ 50pcs","offer_id":52260495065362,"sku":"LFL2024TENGLUOWJ04644x50","price":11.42,"currency_code":"USD","in_stock":true},{"title":"8#-32*1\/4 \/ 50pcs","offer_id":52260495098130,"sku":"LFL2024TENGLUOWJ04645x50","price":6.61,"currency_code":"USD","in_stock":true},{"title":"8#-32*5\/16 \/ 50pcs","offer_id":52260495130898,"sku":"LFL2024TENGLUOWJ04646x50","price":7.07,"currency_code":"USD","in_stock":true},{"title":"8#-32*3\/8 \/ 50pcs","offer_id":52260495163666,"sku":"LFL2024TENGLUOWJ04647x50","price":7.32,"currency_code":"USD","in_stock":true},{"title":"8#-32*1\/2 \/ 100pcs","offer_id":52260495196434,"sku":"LFL2024TENGLUOWJ04648x100","price":10.88,"currency_code":"USD","in_stock":true},{"title":"8#-32*5\/8 \/ 50pcs","offer_id":52260495229202,"sku":"LFL2024TENGLUOWJ04649x50","price":8.69,"currency_code":"USD","in_stock":true},{"title":"8#-32*3\/4 \/ 50pcs","offer_id":52260495261970,"sku":"LFL2024TENGLUOWJ04650x50","price":9.81,"currency_code":"USD","in_stock":true},{"title":"8#-32*1 \/ 50pcs","offer_id":52260495294738,"sku":"LFL2024TENGLUOWJ04651x50","price":11.72,"currency_code":"USD","in_stock":true},{"title":"8#-32*1-1\/4 \/ 50pcs","offer_id":52260495327506,"sku":"LFL2024TENGLUOWJ04652x50","price":13.29,"currency_code":"USD","in_stock":true},{"title":"8#-32*1-1\/2 \/ 50pcs","offer_id":52260495360274,"sku":"LFL2024TENGLUOWJ04653x50","price":14.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of8_b10b811b-5e03-466c-9694-ccf423fa001b.jpg?v=1779090487","url":"https:\/\/homediyer.com\/products\/unc-2-56-4-40-6-32-8-32-a2-stainless-steel-phillips-pan-head-machine-screws","provider":"HomeDIYer","version":"1.0","type":"link"}