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Mr. Gasket Rocker Arm Nuts with Locks 923G

Mr. Gasket Rocker Arm Nuts with Locks 923G
$116.99 ea
NEWARRIVING SOONEstimated Ship Date 06/07/2024 (If Ordered Today)9 Available from HOLLEY PERFORMANCE PRODUCTS as of 05/16/2024
Model: 4012430
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
STANDARD
DELIVERY
Designed to keep the rocker arms positively locked for precise and critical valve train adjustments. Manufactured from quality grade steel, then heat-treated for extra strength and plated with a durable finish. Kits include 16 rocker arm nuts with socket head set screws and one hex key wrench.
Features:
  • (16) Rocker Arm Nuts w/ Locks 3/8"-24 Threads
  • Shank O.D. .540"
  • Includes Locks and Hex Wrench

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Years Engine Fitment Notes
Ford Mustang II 1975 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang II 1976 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang II 1977 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang II 1978 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang 1964 4.7L / 289 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang 1965 4.7L / 289 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang 1966 4.7L / 289 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang 1967 4.7L / 289 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang 1968 4.7L / 289 / V8
5.0L / 302 / V8		 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang 1969 5.0L / 302 / V8
5.8L / 351 / V8		 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang 1970 5.0L / 302 / V8
5.8L / 351 / V8		 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang 1971 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang 1972 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang 1973 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang 1979 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang 1983 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Ford Mustang 1995 5.8L / 351 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Capri 1979 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Capri 1982 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Capri 1983 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Capri 1984 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Capri 1985 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1968 4.7L / 289 / V8
5.0L / 302 / V8		 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1969 5.8L / 351 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1970 5.0L / 302 / V8
5.8L / 351 / V8		 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1974 5.8L / 351 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1975 5.8L / 351 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1976 5.8L / 351 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1977 5.0L / 302 / V8
5.8L / 351 / V8		 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1978 5.0L / 302 / V8
5.8L / 351 / V8		 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1979 5.0L / 302 / V8
5.8L / 351 / V8		 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1980 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1981 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1983 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1984 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1985 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1986 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1987 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;
Mercury Cougar 1988 5.0L / 302 / V8 ULTRA SEAL; SURE-LOCK ROCKER ARM NUTS; 3/8 IN. STUD; FOR ALUMINUM ROCKER ARMS; 16 NUTS W/SOCKET HEAD SET SCREWS AND HEX KEY WRENCH; 0.540 IN. OD SHANK;

Specifications:

Emission Code 5
Engine Chevrolet Small Block Gen I, Ford Small Block Windsor, Pontiac V8
Finish Zinc
Material Steel
Part Type Engine Rocker Arm Nut
Product Type Engine Fasteners
Quantity Per Pkg. 16
Thread 3/8"-24
Warranty Limited 90 Day
Weight 0.7500

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