Pioneer Rocker Stud 3/8 Screw In Special Kit #850001

This Pioneer hardened screw-in rocker stud is designed to replace stock press-in studs. Excellent to have on hand when the stock press-in stud are pulling out and you don't want to pull the head for repairs.
To install these studs you first pull the old studs and tap the holes to 7/16-14 thread size and install the new studs. Use sealer on the 7/16" base threads to protect against coolant leakage. 

Fits Small Block Chevy Engines 

This Pioneer hardened screw-in rocker stud is designed to replace stock press-in studs. Excellent to have on hand when the stock press-in stud are pulling out and you don't want to pull the head for repairs.
To install these studs you first pull the old studs and tap the holes to 7/16-14 thread size and install the new studs. Use sealer on the 7/16" base threads to protect against coolant leakage. Specifications :

Brand: Pioneer Automotive

Manufacturer's Part Number: 850001

Part Type: Rocker Arm Studs

Product Line: Pioneer Rocker Arm Studs

Base Thread Size: 7/16 in.-14

Rocker Arm Nut Thread Size: 3/8 in.-24

Rocker Arm Stud Material: Alloy steel

Guideplate Locator Shank: No

Rocker Arm Nut Thread Length (in.): 0.800 in.

Effective Stud Length (in.): 1.470 in.

Base Thread Length (in.): 0.800

Quantity: Sold as a set of 16.

Small Block Chevrolet 265 283 302 305 307 327 350 sb400 V8. Also can be used in many other applications.

Note: Cylinder Head Machine or threading required for most applications.