ARP 1/4-20in SS 12pt Nut Kit (10/pkg)

SKU: 401-8340 | UPC: 672036045180

ARP 1/4-20in SS 12pt Nut Kit (10/pkg) for 1997-2024 GM LS Vehicles

ARP 1/4-20in stainless steel 12-point nut kit contains 10 nuts designed for secure fastening in high-performance engine applications. These nuts fit GM LS series engines found in Corvettes Camaros Silverados and more used on timing covers headers valve covers and accessory brackets. The 12-point design delivers reliable torque application while stainless steel construction handles heat moisture and vibration in demanding builds.

Key Features

• Stainless Steel Material: Resists corrosion and maintains integrity in engine bays exposed to coolant oil and exhaust gases
• 12-Point Head Design: Offers 12 contact points for wrench or socket engagement preventing slippage and nut rounding during high-torque assembly
• 1/4-20 Thread Size: Matches ARP studs and bolts on LS timing covers headers and manifolds for precise thread engagement and clamping force
• 0.500in Nut Height: Provides adequate thread engagement in space-constrained areas without interfering with components
• 10-Piece Kit Packaging: Supplies exact quantity needed for common jobs like header installs or cover replacements saving time and cost

Product Notes

• Inspect studs for damage and clean all threads prior to installation
• Store in dry area to preserve stainless finish and thread accuracy
• Packaged in protective plastic bag inside cardboard sleeve for damage-free delivery

Installation Notes

• Professional installation recommended.
• Use 3/8in 12-point socket for proper fit and avoid standard 6-point tools
• Lubricate threads with ARP Ultra-Torque for accurate torque values up to 12 ft-lbs

This Part Fits

Year	Make	Model	Submodel
1997-2004	Chevrolet	Corvette	LS1 LS6
1998-2002	Chevrolet	Camaro	LS1 Z28 SS
1998-2002	Pontiac	Firebird	WS6 Trans Am
1999-2007	Chevrolet	Silverado 1500	5.3L LS
2004-2006	Pontiac	GTO	LS1 LS2
2007-2013	Chevrolet	Silverado 1500	6.0L 6.2L LS
2014-2024	Chevrolet	Corvette	C7 LT1 LT4 C8 LT2

Why Choose ARP?

• Trusted by professional race teams in NHRA NASCAR and drag racing
• Manufactured from premium materials with exact tolerances for repeatable performance
• Backed by decades of engineering focused on extreme-duty engine fastening

Frequently Asked Questions

• Q: Will these nuts work on GM LS timing chain covers and headers?
  A: Yes they directly replace OEM nuts on 1/4-20 ARP studs for LS timing covers headers exhaust manifolds and valve covers providing stronger hold under boost and heat
• Q: What type of stainless steel is used?
  A: ARP uses high-grade 300 series stainless steel with strength ratings exceeding 100000 psi and excellent resistance to galling and stress corrosion
• Q: What warranty coverage applies?
  A: ARP offers limited lifetime warranty on these nuts against defects in materials and workmanship when used as directed in performance applications

Shipping & Handling

• Method: UPS Ground or USPS Priority Mail
• Availability: In stock – ships same or next business day
• Packaging: Compact 6 x 4 x 1 inch box with protective insert
• Weight: 0.2 lbs