through 5/8 inches inclusive; and shall extend as close to the head as is practical for sizes larger than 5/8 inches. A torque wrench has a “scatter” (tolerance) of ±17% to ±23%. 8. endstream endobj 2669 0 obj<>/Size 2646/Type/XRef>>stream Materials listed below signify the “clamped” materials and does NOT indicate the threaded material. Threads. The edge between the bearing surface and the side of the head may be broken (rounded or chamfered) but the radius or chamfer measured along the bearing surface shall not exceed the values listed for K. 7. In stock and ready to ship. through 1 in. %PDF-1.4 The tabulate LG values are maximum and represent the minimum design grip length of the screw. Screws over 1 inch in diameter and of lengths shorter than the minimum thread length LT plus 5 times the pitch of the UNRC thread for the respective screw size shall have complete (full form) threads extending as close to the head as is practicable. 4. See examples below: 6-32 x 3/4 Hexagon Socket Head Cap Screw, Alloy Steel .138 – 32 x .75 Spline Socket Head Cap Screws, Alloy Steel, Cadmium Plated. Hexagon and Spline Socket Head Cap Screws shall be designated by the following data in the sequence shown: Nominal size (number, fractional or decimal equivalent); threads per inch; length (fractional or decimal equivalent); product name; material; and protective coating if required. 15. Torque is only an indirect indication of tension. Screw Point Chamfer. Screws having nominal lengths falling between those for which LG and LB values are tabulated in Table 1B shall have Lg and LG dimensions conforming with those of the next shorter tabulated nominal length for the respective screw size. <> Concentricity. Below are guides that show these calculations for a variety of materials, bolts sizes and thread counts over a range of frictional conditions. Designation. We tighten ss socket head cap screws (per ASTM F837, condition CW)* to about 80-90% of their proof load every day, and never (well, hardly ever) strip the heads. Also, the hex drivers get replaced when the black oxide coating is gone, indicating they have worn. pressure wax as supplied on high strength nuts) = .10, hot dip galvenized = .25, … The basic length dimension on the product shall be the nominal length expressed as a two-place decimal. Fillet. 2. The tabulated LB values are minimum and represent the minimum body length of the screw. Log in. x��]K�Gn�ϯ�=xzCS��÷]kW�ca�c���A搢��C#Ҳ���r Bearing Surface. Depending on the types of materials used, joint design, and fastener used, this document serves as a standard to be referenced where applicable. 0000011167 00000 n Socket Cap Screws : Performance & Mechanical Stats : Standard Head - Alloy Steel . 0000000815 00000 n Tightening Torque Clamp Load (lbs.) Head Chamfer. Tightening Torque Clamp Load (lbs.) 6. Body Length, LB. DIN 931 / ISO 4014 Partially Threaded Hex Cap Screw, 10.9 Grade Bare Steel / Yellow Zinc Plated, 10.9 Grade Bare Steel with Extended Threads, DIN 933 / ISO 4017 Fully Threaded Hex Cap Screw, DIN 960 / ISO 8765 Partially Threaded Hex Cap Screw (Fine Thread), DIN 961 / ISO 8676 Fully Threaded Hex Cap Screw (Fine Thread), Japanese Industrial Standard (JIS) Hex Fasteners, JIS B1189-10.9 Small Head Hex Flange Zinc Plated, DIN 912 / ISO 4762 Socket Head Cap Screws, DIN 7991 / ISO 10642 Flat Head Countersunk Socket, DIN 911 / ISO 2936 Short Arm Chrome Vanadium, DIN 911 / ISO 2936 Long Arm Chrome Vanadium, DIN 125 / ISO 7089,7090 Bare Steel/Zinc Plated, DIN 125 / ISO 7089,7090 A2/A4 Stainless Steel, DIN 126 Bare Steel/Hot Dipped Galvanized (ISO FIT), DIN 1440 For Clevis Pins Bare Steel/Zinc Plated, DIN 6916HV-10 Structural Bare Steel/Yellow Zinc Plated, DIN 127B Spring Steel Bare Steel/Zinc Plated/Yellow Zinc Plated, DIN 127B Spring Steel Hot Dipped Galvanized, DIN 127B Alloy Steel Lock Washer Yellow Zinc Plated, DIN 7980 High Collar Bare Steel/Zinc Plated, DIN 6798V Serrated Countersunk Zinc Plated, NFE 25-511 Contact Washer Yellow Zinc Plated, DIN 2093 Disc Spring Carbon Steel/Chrome Vanadium, DIN 137B Crinkled Spring A2 Stainless Steel, DIN 934 Bare Steel/Zinc Plated/Hot Dip Galvanized, DIN 985 Nylon Insert Zinc Plated / Hot Dipped Galvanized (ISO FIT), DIN 963 Slotted Flat Countersunk A2 Stainless, DIN 965 Phillips Flat Countersunk A2 Stainless Steel, DIN 7985 Phillips Pan Head A2 Stainless Steel, DIN 975-8.8 Hot Dipped Galvanized (ISO FIT), ISO 529/DIN 374 HSS-G/HSS-E Metric Machine Taps, DIN 580 Lifting Eye Bolt A2 Stainless Steel, DIN 479-8.8 Square Head Set Screw Bare Steel, DIN 931-A2/A4 / ISO 4014 Hex Head Cap Screw Part Thread, DIN 933-A2/A4 / ISO 4017 Hex Head Cap Screw Full Thread, DIN 912-A2/A4 / ISO 4762 Socket Cap Screw, DIN 7991-A2/A4 / ISO 10642 Flat Head Countersunk Socket, DIN 125-A2/A4 / ISO 7089,7090 Flat Washer, DIN 965-A2 Phillips Flat Head Countersunk, DIN 975-A2 Threaded Rod (1 Meter) FINE Thread, DIN 933 / ISO 4017 Hex Cap Screw Fully Threaded, DIN 963 Slotted Flat Head Countersunk Machine Screw, Holo-Krome Grade 9 Inch Heavy Hex Cap Screws, Holo-Krome 12-Point Flange Screws – Imperial, Short Arm Hexagon Key CV Steel Black Finish, Long Arm Hexagon Key CV Steel Satin Finish, 1.
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