The ARP ATP4.400-1LB is an individual dual-thread stud featuring an M11 x 1.50 base thread and 7/16-20 upper thread with a 4.400-inch overall length. It is designed for compatible automotive, engine, and custom fastening applications requiring this specific mixed metric/SAE thread configuration.
This stud is manufactured from 8740 chrome moly and features a black oxide finish. ARP precision manufactures its studs for demanding performance applications, including centerless grinding and rolled threads for consistent fit and durability.
Features
- Genuine ARP individual stud
- ARP part number ATP4.400-1LB
- M11 x 1.50 base thread
- 7/16-20 upper thread
- 4.400-inch overall length
- 8740 chrome moly construction
- Black oxide finish
- Precision centerless-ground stud construction
- Thread-rolled manufacturing process
- Sold individually
Specifications
- Manufacturer: ARP
- Part Number: ATP4.400-1LB
- VelocityShop SKU: ARPATP4.400-1LB
- Product Type: Individual Dual-Thread Stud
- Base Thread Size: M11 x 1.50
- Top Thread Size: 7/16-20
- Overall Length: 4.400 Inches
- Material: 8740 Chrome Moly
- Finish: Black Oxide
- Nuts Included: No
- Washers Included: No
- Quantity: 1 Stud
Dual-Thread Design
The ATP4.400-1LB uses an M11 x 1.50 thread on one end and a 7/16-20 thread on the opposite end. This mixed metric and SAE configuration is intended for applications specifically requiring this ARP stud geometry.
Recommended Use
- Replacement of an individual compatible ARP stud
- Custom engine hardware assemblies
- Automotive and motorsports fabrication
- Applications requiring M11 x 1.50 and 7/16-20 thread sizes
- Applications specifically calling for ARP ATP4.400-1LB
What's Included
- 1 ARP ATP4.400-1LB stud
Fitment Note
This is an individual universal-style ARP fastener rather than a complete vehicle-specific hardware kit. Verify both thread sizes, overall length, thread engagement, and application requirements before ordering.
Installation Note
Install using the torque, lubricant, and preload requirements specified for the exact application. Nuts and washers are sold separately. Do not select torque solely from the stud thread size when the fastener is used in a critical engine or driveline assembly.
Proposition 65 Warnings.
Cancer and Reproductive Harm. See details below.
Items that are not CARB Legal will not be sold and ship to California or CARB states.
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