1/4-20 x 1/2″ Button Head Socket Cap Screws Black Oxide Alloy Steel Qty 50 General Product Information Head Style : Button Drive Style : Allen Hex Key Drive Size : 5/32″ Thread : 1/4-20 Length : 1/2″ Quantity of Fasteners in Package : 50 Material Type : Alloy Steel Grade Rating : 8 Detailed Product Information: Head Diameter : Head Height : 0.132″ Thread Diameter : 0.250″ Threads Per Inch (TPI) : 20 Coarse or Fine Thread : Coarse Thread Coverage : Full Thread Thread Length : 0.500 Key Notes: Button socket cap screws have a wide bearing surface and high tensile strength but are low profile allowing for clearance in tight spaces where there is not sufficient space for wrenches or sockets button head cap screw is recommended for lighter fastening operations and is not suggested for use in critical high strength applications where socket head cap screws should normally be used Black oxide is not a coating but a surface chemical conversion process that offers a mild corrosion resistance Fastenere black oxide button head socket cap screws are treated with a heavy water displacing oil that coats the fastener offering a greater level of corrosion resistance than most other black oxide fasteners These button cap screws are a grade 8 equivalent offering a high tensile and yield strength These fasteners have a machined thread pattern of 1/4-20 which is apart of the unified thread system Shipping: All orders placed before 3:30 pm EST Will Ship Same Day Tracking is provided on ALL Orders Priority Mail Shipping service is offered at a discount of only $3.95 UPS Ground UPS Next Day Air is available, Please inquire for pricing Returns : ALL returns are accepted if returned within 60 days. Money Back or exchange guaranteed. NO Restocking Fees. For YOU, we constantly strive to find ways of improving our performance.