1/2"-13 x 1-1/2" Grade 8 Flange Flange Bolts (4-Pack) – Heavy-Duty Hex Flange Bolts Includes All-Metal Lock Nuts – High-Strength SAE J429/J995 Anti-Vibration 1.5" Coarse Thread, Prevailing Torque

1/2"-13 x 1-1/2" Grade 8 Flange Flange Bolts (4-Pack) – Heavy-Duty Hex Flange Bolts Includes All-Metal Lock Nuts – High-Strength SAE J429/J995 Anti-Vibration 1.5" Coarse Thread, Prevailing Torque

• Complete 4-packs: Includes 4 Grade 8 flange bolts, 4 Grade C all-metal prevailing torque lock nuts— everything you need for strong, vibration-resistant fastening in one convenient pack. Bolts 1/2" x 1-1/2" long. Nuts fit 1/2" bolts. Grade C nuts compatible with Grade 8 bolts.
• Grade 8 Strength for Demanding Jobs: High-tensile SAE J429 Grade 8 bolts deliver superior load capacity and shear strength. Bolts are: IFI-111 Dimensional Requirements. ASME B18.6.3 Dimensional Requirements for Machine Screws. SAE J429 Material and Strength Level. ASME B1.1 Thread Requirements. ASTM F788 Surface Discontinuities. ASME B18.18 Inspection and Quality Assurance. Unified Threads (UNC and UNF) Class 2A. hread acceptance per ASME B1.3, System 21. Hardness HRC 33/39. All-metal lock nuts are: IFI 100/107 for Grade C which is designed to be used on fasteners up to a Grade 8 strength level. Proof load strength 150,000 psi. Hardness Rc 24/32.
• High-Strength Flange Bolt, Locking Nut – The Grade 8 bolt provides the primary load-bearing strength, while the Grade C nut delivers secure retention and resistance to loosening.
• Precision-Matched Components: All fasteners are 1/2"-13 UNC for reliable fit and consistent clamping force across every assembly — no mismatched hardware, no guesswork.
• Built for Pros & Serious DIYers: Whether you’re repairing equipment, building fixtures, or assembling heavy components, this delivers industrial-grade reliability in a compact, easy-to-store format.