Lubed means cleaned, dry bolts, lubricated with standard medium viscosity machine oil. { No special steps are taken to add further lubrication prior to assembly. If a bolt is torqued rather than the nut then the torque value should be increased to compensate for the additional frictionbolt should only be torqued if they are fitted in clearance holes. Bolt Size. * SAE J429 grade 8 bolts do not exceed 1-1/2″ diameter. The bolting standard will define whether the torque value is for a dry or lubricated stud/bolt thread. DFM DFA Training "+ (dt.getFullYear()) +" "+ (("0"+dt.getHours()).slice(-2)) +":"+ (("0"+dt.getMinutes()).slice(-2)); Advertising bolts. The numerical code shown on the head of a DIN bolt specifies the strength type. Lubricate all contact areas of the bolts and washers. The below chart refers to usage in steel. Sign up for our bi-monthly email newsletter for all the latest! Proof load, stress area, yield strength, and other data is based on IFI 7th Edition (2003) Technical Data N-68, SAE J429, ASTM A307, A325, A354, A449, and A490. When it comes to designing new aircrafts or aircraft components, you won’t be able to turn to manufacturer’s specifications, because you’ll be coming up with them. Apply torque to a bolt head only when a torque wrench cannot be used on the nut. Engineering Forum Size Recommended Torque; Grade 2 Grade 5 Grade 8 18-8 S/S Bronze Brass; Coarse Fine … at 100% of yield. Due to many variables that affect the torque-tension relationship like human error, surface texture, and lubrication the only way to determine the correct torque is through experimentation under actual joint and assembly conditions. US Bolts - Tightening Torques - Recommended bolt torques; Whitworth Bolt Torques - Torque specifications Whitworth bolts; Tag Search . Dry. All calculations are for Coarse Thread Series (UNC). Advertising Center // -->, GD&T Training Geometric Dimensioning Tolerancing. The only times you’ll use a standard aircraft torque bolt chart is if the manufacturer did not specify the torque for your bolt or if you do not have access to the manufacturer’s specifications. Unlike the DIN 931 and DIN 912 the shank of a DIN 933 bolt goes up to the head. © Copyright 2000 - 2021, by Engineers Edge, LLC www.engineersedge.com All rights reserved bolting torque table 2a - cold service astm a320 grade l7 stud bolts. Downloads bolts are standard bolts made of steel with undrilled shank. Clamp loads for Grade C lock nuts equal 75% of the bolt proof loads specified for SAE J-429 Grade 8, and ASTM A-354 Grade BD bolts. U.S. Tightening Torque Clamp Load (lbs.) Training Online Engineering Values calculated using industry accepted formula T = KDP where T = Torque, K = torque coefficient (dimensionless), D = nominal diameter (inches), P = bolt clamp load, lb. standard bolt torque spec chart, Alma Bolt Company & Prime Fasteners 1-800-526-2200. This information is voluntary, and is intended only for general-purpose reference as explained in this disclaimer. TORQUE-TENSION RELATIONSHIP FOR A307A, GRADE 5, 8 & 9 BOLTS Locknut Size Threads per inch Steel Hex Locknut Steel Hex Flange Nut Grade C FNL Grade 9 Grade F Grade G Clamp Load (lbs.) u = The coefficient of friction of the lubricant Figures are a GUIDE only, always consult the manufacturer or area engineer . Torque (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), Nom Dia-Pitch Nom Size x Pitch INCH BOLT TORQUE TABLE SAE J429 and ASME 574 METRIC BOLT TORQUE TABLE ISO 898 This is done to allow a safety buffer so that the bolt does not get too close to the proofload value. Maximum Recommended Tightening Torques Metric Course Pitch Grade 12.9 Plated Metric Course Pitch Grade 10.9 Plated Metric Course Pitch Grade 8.8 Plated Nm ft … Bolts..... 8 Table 6.2 Tightening Torque – B.S.W. | Contact | Privacy Policy, Home 1/4" - 20 #7 .201 12 9 . 3/8" - 24 Q .332 50 35 . IFI-100 does not govern lock nuts above 1". 3/8" - 16 5/16 .3125 45 35 . CDI Torque Products is not responsible for any application of torque or it's consequences as a result of using this chart. ga('create', 'UA-6310447-1', 'auto'); There are many variables affecting the torque-tension relationship, such as human error, surface texture, and lubrication. Excel App. Advertising Title: Metric Bolts, Screws & Nuts: Tightening Torques Author: Fastener Mart Created Date: 8/12/2006 10:22:23 PM bolting torque table 5 - ptfe coated astm a193 b7 and astm 193 b16 stud bolts. Disclaimer There is no torque difference for fine or coarse threads.