SKU: ALL18629-50
UPC: 848238090840
MPN: ALL18629-50
The ALLSTAR PERFORMANCE Countersunk Bolts 1/4-inch with 3/4-inch Washer Black 50-pack (ALL18629-50) delivers precision fastening hardware purpose-built for high-vibration mechanical assemblies, engine bay work, and aerospace/motorsports applications. This 50-piece kit combines 1/4-20 thread countersunk bolts with integrated countersunk washers and matching nuts in durable steel construction with black finish, eliminating the need to source compatible fastener sets separately.
The 1-inch overall length and countersunk head design allow bolts to sit flush with mating surfaces, critical for aerodynamic engine covers, transmission pans, and control panel housings where protruding fasteners create airflow disruption or snag points. The 0.75-inch outside diameter countersunk washers distribute clamping load evenly across wider surface areas, preventing fastener pull-through on softer materials like aluminum or composite panels. Allen head configuration enables secure installation with standard hex key wrenches found in any shop or field kit, providing controlled torque application without cam-out risk inherent in Phillips or slotted heads.
This fastener set is essential for motorsports technicians assembling or repairing engine covers, fuel system components, and lightweight chassis panels where flush-mount integrity directly impacts performance and inspection accessibility. Off-road recovery specialists and vehicle fabricators rely on matched bolt-washer-nut combinations to eliminate mismatches in critical vibration-prone joints. The black finish provides corrosion resistance and visual consistency across assembled work, reducing cleanup time and improving professional appearance on visible assemblies.
A 50-count inventory covers typical mid-sized assembly projects—enough for engine bay work, suspension refresh, or frame reinforcement without bulk overstocking. Steel construction with hardened fasteners ensures safe reusability across multiple projects, and the included nuts eliminate secondary sourcing for complete fastener systems.
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