2025 ARP Catalog

Terms & Conditions 179 ARP ARP Tech Guide ABriefHistory....................... 6 The Manufacturing Process. . . . . . . . . . . . 7 BehindtheScenes................... 12 WhatARPCanDoForYou.. . . . . . . . . . . 13 The “Aerospace Quality” Myth. . . . . . . . 14 Motorsports Fastener Engineering for theNon-Engineer................... 18 Recognizing Common FastenerFailures.................... 22 Metallurgy for the Non-Engineer. . . . . . 24 CustomFasteners................... 31 Material Specifications............... 32 Glossary of Tech Terms.. . . . . . . . . . . . . . 34 Head Fastener Measurements.. . . . . . . . 36 General Torque Recommendations. . . . 37 Proper Fastener Retention.. . . . . . . . . . . 40 The Importance of Proper Rod Bolt Stretch & Torque.. . . . . 53 Rod Bolt Length Monitoring Chart.. . . . 54 Rod Bolt Stretch & Torque Specs . . . . . . 55 Head Studs versus Bolts.. . . . . . . . . . . . . 73 Fasteners by Dimension 144 SAE Bolts 10/24 & 10/32.. . . . . . . . . 145 1/4-20.................146 1/4-28.................147 5/16-18...............148 5/16-24...............149 3/8-16 Reduced.. . . . . . . . 150 3/8-16 Standard . . . . . . . . 150 3/8-24 Reduced.. . . . . . . . 151 3/8-24 Standard . . . . . . . . 151 7/16-14 Standard. . . . . . . 152 7/16-20 Standard. . . . . . . 153 1/2-13.................155 1/2-20.................156 Metric Bolts M6x10...............157 M8x125..............158 M10 x 1 25 159 M10 x 1 50 159 M12 x 1 50 160 M12 x 1 75 160 Nuts SAE12-point.. . . . . . . . . . 161 Metric 12-point. . . . . . . . . 162 SAEHex...............163 SAE&Nyloc.. . . . . . . . . . . 163 Serrated Flange.. . . . . . . . 164 Self-Locking. . . . . . . . . . . . 164 Washers SAE...................165 Metric.................168 Insert Washers.. . . . . . . . . 169 WeldBungs.. . . . . . . . . . . 169 Bulk Fastener Bins - 170 Installation Tools 171 Ultra-Torque. . . . . . . . . . . . 171 Rod Bolt Stretch Gauge.................172 Thread Sealer.. . . . . . . . . . 172 Rod Bolt Extensions . . . . . 173 RodVise...............173 Thread Cleaning Chasers................174 Spark Plug Indexer. . . . . . 174 Ring Compressors.. . . . . . 175 Ring Squaring Tools . . . . . 176 Oil Pump Primer Kits . . . . 176 Apparel 177 Automotive Racing Products, Inc. 1863 Eastman Avenue, Ventura, CA 93003 Copyright MCMXC-MMXXV Automotive Racing Products, Inc. All Rights Reserved. “ARP”, the ARP logo, Wave-Loc, Perma-Loc, ARP2000, ARP3.5 and ARP Ultra-Torque are registered trademarks of Automotive Racing Products, Inc. All other trademarks are property of their respective owners. ARP-bolts.com 800-826-3045 5 FASTENERS BY GROUP

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