Please find below documents as a part of our Technical Support section. If case of any further questions, please visit our Frequently Asked Questions (FAQ) section or contact with Andrews Fasteners Quality Department.

Preloaded / Non-preloaded fasteners

• Bolt Length Calculator for HR Bolts and HR Countersunk Bolts (EN 14399-3/7)
• Thread Length Calculator for HR Bolts to EN 14399-3
• Thread Length Calculator for HR Countersunk Bolts to EN 14399-7
• Torque values for preload bolt assemblies with specified k-Class
• Torque values prepared by W. Christie
• Guidance On The Tightening of Non Pre-load Fasteners
• Comparison of Tightening Methods of HSFG Bolts
• Detailed comparison of BS 4395 and BS EN 14399-3 & 6
• Summary comparison of BS 4395 and BS EN 14399-3 & 6
• Grip, Bolt Lengths and Hole Dimensions
• Guidance notes on the use of Preload Bolt Assemblies
• BS EN 14399 (HSFG) comparison as an alternative to ASTM HSFG
• Guide to Design Criteria for Bolted and Riveted Joints, Second Edition

See also:

• Preloaded assemblies k-Class K1 and K2 manufactured in the UK (from News)

Direct Tension Indicators (DTI) Washer

• Instruction Manual for installing Preloaded (HSFG) bolting with TurnaSure Direct Tension Indicators Washers EN 14399-9
• New Generation Direct Tension Indicators
• Squirter Type DTI performance results
• Preload Measurement and Comparison of Structural Bolts sets installed in Steel Connections with and without DTI
• Tests for stress relaxation over time 1963 to 1971 with CLI
• Fatigue tests on CLI
• CLI Washers-load gap relationship on unloading and loading
• DTI Case History – DTIs Save More than $150,000
• Study discussing influence of load-indicating washers on bolt relaxation in joints subject to high prying forces
• Study on full flattening of Direct Tension Indicators in Shear Connections
• Study on curved protrusion DTIs design assembled without needing nut face or bolt face washers
• Impact of Variable Lubricity on Type 325 Structural DTIs
• Test Report for Accelerated Aging of Weathering Steel Joint using TurnaSure Weathering Steel
• Transverse Vibration Loosening Characteristics of High Strength Fastened Joints using DTIs

Coating

• Trivalent passivation systems (Fasteners+Fixings Magaizne)
• The HDG (Hot Dip Galvanising) Coating (Source: galvanizeit.org)

Mechanical properties

• Hardness conversion charts according to ISO 18265 (Source: BUEHLER)

Other

• Bolt Extenders – Specification

Lindapter

• Hollo-Bolt Technical Brochure
• Type HB Hollo-Bolt – Correct Installation Card

Educational

• History of Fasteners – What is a thread