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UK Drills Home About Us Feedback Contact Us Follow Us Store Categories Store Categories Screws And Bolts Nut Series Washer Series Inch Series - Assortment Kit Hand Tools Grinding Tools Kit Set Screws Assortment Kit Company Brand Honest Seller Item Description 5/16"-18 Hex Socket Countersunk Screws Bolt Black Alloy Steel 10.9 Grade DIN7991 ● Brand: GooBetter Fastener ● Product Name: Hexagon Socket Flat Countersunk Head Screw Bolt ● Model：DIN7991 ● Material: Alloy Steel ● Level: 10.9 Grade ● Drive System: Hexagon Socket ● Head Style: Flat ● Exterior Finish: Black Oxide ● Head Type: Countersunk Head ● Thread Coverage: ‎Fully Threaded ● Thread Diameter: 5/16"-18 UNC ● Length: 1/2", 5/8", 3/4", 1", 1-1/4", 1-1/2", 1-3/4", 2", 2-1/2". ● Please Refer to the Attached Parameter Diagram for Specific Parameters. ● Specification Eg: 5/16" x 1/2" (Thread Diameter d =5/16", Length L = 1/2", Including the Head Length) ● Packing: Plastic Bag / Carton Box Product Features 【10.9 Grade High-Strength Material】- Grade 10.9 Bolts Have High Strength, High Hardness, Corrosion Resistance, Oxidation Resistance, Good Wear Resistance, High Toughness, High And Low Temperature Resistance, Safety And Stability, Long Service Life, And Wide Application Range. 【Hexagon Socket Head】- Standard Hex Socket Recess, Uniform Force Is Not Easy to Slip, More Convenient to Use, Smooth Surface, Hex Groove Deep Tunnel, Easy to Tighten. 【Clear and Precise Threads】 - Each Screw Is Meticulously Crafted to Feature Clear and Precise Threads, Allowing for Easy Insertion and Tightening. This Ensures a Tight and Secure Connection, Reducing the Risk of Loosening or Damage over Time. Product Application Hex Socket Countersunk Head Screw Bolt Widely Used in Various Home Decoration, Medical Equipment, Vehicle and Ship Accessories, Industrial Building Materials, Food Industry, Precision Machinery, Instruments, Electronic Products, Communication Products, Digital products, renovation work，Household Appliances, Locks, Lamps, Toys, Etc. Reliable After-Sales Service: We Are Committed to Providing Excellent Customer Service and Support, Ensuring Your Satisfaction with Our. If You Have Any Issues or Questions, Please Feel Free to Contact Us. About Us： Payment: Delivery Details About Item Contact Us About Us： Hengkun Electronics Co., Ltd Founded In Now 2013. Goobetter is a fastener brand under the company's umbrella, On The Basic Of Hardware Accessories Production And Supply, The Company Has Taken In A Group Of Experienced Personnel Who Are Talented In Senior Management, Marketing And Skills Of Producing. In The Company Great Attention Is Paid To Basic Management, Stable Quality, Continuously Improving Pre-Sale Services, Sale And After-Sale Services, And Enhancing The Market Competitiveness Of Our Products. Main Products Of Our Company: Complete In Specifications Fasteners, Hand Tools, Electronics, Transmission Components, DIY，Etc We Are Doing Everything To Offer Our Customers With Best Services And Products, And The Company Promise That We' Ii Be Responsible All The Way To The End Once We Services Begin. Payment: Package Included: As per Your Choice! Payment: 1. Payment is needed to receive within 7 days after deal.if not we will close the transaction. 2.Payments Can Be Made Through a Variety of Methods and Channels(Paypal Is Recommended As It Is Convenient and Fast) 3.Please List Your Special Requests (Color, Packages, Etc.) in the Paypal Notes Section When You Make Payment. 4.Regarding The Problem Of Multiple Purchases And Only One Shipping Fee, You Can Contact Our Customer Service To Understand Delivery Details We Need Your Detailed Shipping Address, Please Make Sure It Is 100% Correct Your Parcel Will Be Dispatched Within 1 Business Day After the Payment Is Clear. by Default, It May Need 2-5 Business Days to Finish Delivered. Conditions of Sale: If You Are Not Satisfied with the Item, Please Contact Us. We Will Offer Full Refunds to You When We Receive Your Returned Item. Any Problem, Please Feel Free to Contact Us. About Item About Item： For the Functional Products in Our Store, We Make Sure the Functions Are the Same As Description, But the Actual Color and Shape May Be a Little Different from the Pictures Due to the Technical Improvement and Manufacturing Variance. Please Consider This Before You Bid. Note: Due to manual measurement, please allow an error of 0.1-0.2mm. Contact Us If You Are Satisfied with the Products, I Expect That You Can Give Us Positive Feedback. If You Have Any Problem or You Are Not Satisfied with It, Please Feel Free to Contact Us, We Will Reply You Within 24 Hours. Contact Us: We Care About Our Valued Buyers, If You Have Any Questions Our Customer Service Representatives Will Be Very Happy to Help You. We Try Our Best to Answer Your Emails As Soon As Possible. However, Due to the High Number of Emails We Receive Every Day and the Time Zone Difference, We May Not Be Able to Reply to Your Emails Immediately. Please Allow 24 Business Hours for Us to Respond.