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(888) 312-8812 Login SignupAUTOLITE 303 Spark Plug - Copper Resistor, 13/16-inch Hex, Standard, Nickel
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MSRP: $3.38
$321
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AUTOLITE 303 Part Description
Manufacturer
Product Description
Autolite 303 Copper Resistor Spark Plug
Features & Benefits
- Electrode geometry delivers consistent arc travel during unstable mixture combustion
- Nickel-plated shell withstands corrosive compounds commonly found in urban road spray
- EMI-control chamber helps protect communication systems from ignition interference
- Ceramic body composition maintains structural strength during wide thermal cycling
- Secure upper terminal supports strong coil connection on aging ignition harnesses
Autolite Spark Plug
The Autolite Spark Plug is commonly installed in work vehicles and light commercial engines that undergo constant stop-and-go cycles. It features a copper resistor that helps maintain a consistent thermal profile during frequent restarts. The 13/16-inch hex form suits larger cast-iron cylinder heads often found in older service vans and small utility trucks. Multiple ceramic ribs protect against voltage tracking when water intrusion, chemical vapors, or high humidity surround the ignition system. A fused-glass resistor seal further reduces EMI that can interfere with radios, scanners, and diagnostics. The Autolite 303 provides stability for engines subjected to repeated warm-ups, extended idle periods, and electrically sensitive environments.
AUTOLITE 303 Specifications
Product Attributes
| Resistance | 5000 82 |
| Ground Electrode Tip Design | Standard |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Removable Nut |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | 0.8636 MM |
| Ground Electrode Quantity | 1 |
| Hex Size | 21 MM |
| Seat Type | Flat |
| Reach | 9.4996 MM |
| Thread Diameter | 14 MM |
| Insulator Material | Ceramic |
| Resistor Type | Yes |
| Ground Electrode Tip Material | Nickel |
| Center Electrode Design | Standard |
| Center Electrode Projection | Short Projection |
| Washer(s) Included | Yes |
| Grade Type | Regular |
| Pre-Gap Size | 0.034 IN |
| Hex Size | 13/16 IN |
| Manufacturer Heat Range | 8 |
| Reach | 0.374 IN |
| Skirt | Yes |
| Hex Type | Hex |
| Indexed | No |
| Hex Size (Inch) | 13/16 |
| Reach (Millimeter) | 9 |
| Thread Diameter (Millimeter) | 14 |
| Pre-Gap Size (Millimeter) | 0.9 |
| Resistance (Ohm) | 5000 |
Additional Information
| Country of Origin (Primary) | CN |
| Harmonized Tariff Code (Schedule B) | 8511100000 |
| Warranty Time | 2 |
| Warranty Time UOM | YR |
| Harmonized Tariff Code (HTS) | 8511100000 |
| UPC | 00009100003034 |
| UNSPSC | 26101732 |
AUTOLITE 303 Part Interchanges
| Brand | Part Number |
|---|---|
| Champion Spark Plug | 102, 823, 8231, J6C, RJ6C |
| DENSO Auto Parts | 3075, W16S-U, W20S-U |
| Motorcraft | A3X, A5, A5X, AR31, AR41, AR51, AS4C, AT3, AT4, AZ3, SP476 |
| NGK | 742, B6S, B6Y, B7C, B7S, BR6S |
| ACDelco | 43, 44, B4031, B43, B45, C43, C44, C45, CR43, CR43K, M44B, M44C, M45, MR44C, R43, R43C, S44 |
| Bosch | W8EC |
| Splitfire - Archived | SF30C, SM30C |
| ACCEL | 124 |
| Caterpillar | 9B-0444 |
| Chrysler | 8129861, 8129865 |
| General Motors | 5569992, 5612002, 5612567, 5612569, 5613865 |
| Ford | 8U2J12405AYA |
| Harley Davidson | HD5 |
| Sears | STD361303 |
| Stitt | 407L |
AUTOLITE 303 Fits Vehicles
- International LM153 (1950-1952)
- International L130 (1950-1952)
- International SM122 (1956)
- International S102 (1956)
- International SA120 (1956)
- International S132 (1953-1956)
- International S130 (1956)
- International SM132 (1956)
- International SM120 (1956)
- International SM130 (1956)
- International SA122 (1956)
- International S122 (1956)
- International S120 (1956)
- International S112 (1956)
- International S110 (1956)
- International RM121 (1953-1955)
- International RA120 (1953-1955)
- International R112 (1953-1955)
- International R100 (1953-1955)
- International RM122 (1953-1955)
- International S100 (1956)
- International RM120 (1953-1955)
- International R132 (1953-1955)
- International R122 (1953-1955)
- International RA121 (1953-1955)
- International R130 (1953-1955)
- International RA122 (1953-1955)
- International R121 (1953-1955)
- International R110 (1953-1955)
- International LM151 (1952)
- International R131 (1953-1955)
- International R120 (1953-1955)
- International R102 (1953-1955)
- International R111 (1953-1955)
- International LM121 (1950-1952)
- International L151 (1951-1952)
- International L112 (1950-1952)
- International LB140 (1951-1952)
- International LM150 (1950-1952)
- International L153 (1950-1952)
- International L121 (1950-1952)
- International L110 (1950-1952)
- International LM122 (1950-1952)
- International L150 (1950-1952)
- International L120 (1950-1952)
- International LM120 (1950-1952)
- International L122 (1950-1952)
- International L111 (1950-1952)
- International MS1210 (1972-1974)
- International MHC1310 (1974)
- International M800 Post Office (1972)
- International M1200 (1972)
- International M1100 (1972)
- International 1310 (1972-1973)
- International 1210 (1972-1973)
- International 1110 (1972-1973)
- International 1010 (1972-1973)
- International 100 (1974)
- International Travelall (1975)
- International MS (1975)
- International Scout II (1972-1980)
- International 200 (1974-1975)
- International 150 (1975)
- Indian Scout (1934-1937)
- Indian 741 (1941-1942)
- Indian Inline 4 (1934-1942)
- Indian Sport Scout (1934-1942)
- Indian Chief (1934-1948, 1950-1953)
- GMC G35/G3500 Van (1970)
- GMC PB1000 Series (1961)
- GMC 3000 (1960-1962)
- GMC Suburban (1960-1962)
- GMC 3500 (1960-1962)
- Chevrolet C40 (1960-1962)
- Pontiac Parisienne (1959-1962)
- Chevrolet 3G (1959)
- Chevrolet 3F (1959)
- Chevrolet 3E (1959)
- Chevrolet 3D (1959)
- Chevrolet 3C (1959)
- Chevrolet 3B (1959)
- Pontiac Strato-Chief (1958-1962)
- Dodge Custom (1957-1958)
- Pontiac Pathfinder (1955-1958)
- Pontiac Laurentian (1955-1962)
- GMC M340 (1955-1956)
- GMC S300 (1955-1959)
- GMC PM250 (1955-1959)
- GMC PM150 (1955-1959)
- GMC 350-8 (1955-1959)
- GMC FM350 (1955-1956)
- GMC FM340 (1955-1956)
- GMC M300 (1954-1959)
- GMC PM250-24 (1954)
- Chevrolet 1500 (1954)
- GMC Truck (1953-1960)
- GMC S370 (1953-1959)
- GMC S300-24 (1953-1954)
- GMC PM152-22 (1953-1954)
- GMC PM150-24 (1953-1954)
- GMC PM150-22 (1953-1954)
- GMC P150-22 (1953-1954)
- GMC 370 (1953-1959)
- GMC 350-27 (1953-1954)
- GMC 350-24 (1953-1954)
- GMC M350-27 (1953-1954)
- GMC M350-24 (1953-1954)
- GMC F370 (1953-1959)
- GMC F350-27 (1953-1954)
- GMC F350-24 (1953-1954)
- GMC 100-24 (1953-1954)
- GMC 100 (1953-1959)
- GMC F350 (1953-1959)
- GMC 300-24 (1953-1954)
- GMC 300 (1953-1959)
- GMC 280-22 (1953-1955)
- GMC 250-24 (1953-1954)
- GMC 250-22 (1953-1955)
- GMC 250 (1953-1959)
- GMC 150-24 (1953-1954)
- GMC 150 (1953-1959)
- GMC FP152 (1949)
- GMC EF242 (1948-1949)
- GMC FCS300 (1947-1949)
- GMC FC252 (1947-1949)
- GMC FF350 (1947-1949)
- GMC FC300 (1947-1949)
- GMC FC280 (1947-1949)
- GMC FC250 (1947-1949)
- GMC FC101 (1947-1949)
- GMC EC282 (1947)
- GMC EC250 (1947)
- GMC 100-22 (1947-1949, 1953-1955)
- GMC FC350 (1947-1949)
- GMC FC281 (1947-1949)
- GMC FC251 (1947-1949)
- GMC FC102 (1947-1949)
- GMC EC283 (1947)
- GMC FCS350 (1947-1949)
- GMC FC283 (1947)
- GMC FC253 (1947-1949)
- GMC FC152 (1947-1949)
- GMC FC100 (1947-1949)
- GMC EC280 (1947)
- GMC FC150 (1947-1949)
- GMC EF241 (1947-1949)
- GMC EC252 (1947)
- GMC EC251 (1947)
- GMC 150-22 (1947-1949, 1953-1955)
- Chevrolet Sedan Delivery (1947-1951, 1953-1958)
- GMC EF350 (1946)
- GMC EC350 (1946)
- Chevrolet DS (1946)
- Chevrolet DP (1946)
- Chevrolet CK (1946)
- GMC EC101 (1945-1947)
- GMC EC152 (1945-1947)
- Chevrolet DR (1946)
- GMC CC102 (1945-1947)
- GMC EC102 (1945-1947)
- GMC CC101 (1945-1947)
- Chevrolet DJ (1945-1946)
- GMC CCV100 (1942-1947)
- GMC CC150 (1942-1947)
- GMC EC100 (1942-1947)
- GMC CC260 (1942, 1946-1947)
- Chevrolet BG (1943)
- GMC EC150 (1942-1947)
- GMC CC300 (1942)
- GMC CC100 (1942-1947)
- GMC CCX250 (1942-1947)
- GMC CC250 (1942-1947)
- Chevrolet BN (1942-1945)
- Chevrolet BL (1942-1945)
- Chevrolet BJ (1942)
- Chevrolet BM (1942-1945)
- Chevrolet BK (1942-1946)
- Chevrolet Truck (1935, 1942-1960)
- Chevrolet DB (1934)
- Chevrolet Eagle CB (1933)
- Chevrolet K20 Panel (1967)
- Chevrolet C10 Panel (1960-1961)
- Chevrolet C30 Panel (1960-1961)
- Chevrolet G30 Van (1970)
- Zundapp Janus 250 (1956-1958)
- GMC PV1000 (1960)
- GMC PM153 (1955, 1957, 1959)
- GMC PM251 (1956-1959)
- GMC PM252 (1954-1955, 1958)
- GMC PM152 (1954-1955, 1957-1959)
- GMC PM253 (1954-1955, 1958)
- GMC PM151 (1955-1959)
- Chevrolet Pickup (1936)
- Pontiac Star Chief (1955-1961)
- Plymouth Suburban (1957-1959)
- Plymouth Savoy (1957-1959)
- Plymouth Plaza (1957-1958)
- Plymouth Fury (1957-1959)
- Plymouth Belvedere (1957-1959)
- GMC V3000 Forward Control (1960-1962)
- GMC P35/P3500 Van (1970)
- GMC P25/P2500 Van (1970)
- GMC K35/K3500 Pickup (1968-1970)
- GMC K25/K2500 Suburban (1968-1970)
- GMC K25/K2500 Pickup (1967-1970)
- GMC K15/K1500 Suburban (1967-1970)
- GMC K15/K1500 Pickup (1967-1970)
- GMC Jimmy (1970)
- GMC G25/G2500 Van (1967, 1970)
- GMC G15/G1500 Van (1967)
- GMC C35/C3500 Pickup (1967-1970)
- GMC C25/C2500 Suburban (1968-1970)
- GMC C25/C2500 Pickup (1967-1970)
- GMC C15/C1500 Suburban (1968-1970)
- GMC C15/C1500 Pickup (1967-1970)
- GMC 2500 Series (1960-1962)
- GMC 1500 Series (1960-1962)
- GMC 1000 Series (1960-1962)
- Dodge Coronet (1957-1959)
- Chevrolet Two-Ten Series (1953)
- Chevrolet Suburban (1960-1962, 1966)
- Chevrolet Styleline Deluxe (1950-1952)
- Chevrolet P30 Van (1970)
- Chevrolet P30 Series (1960-1962)
- Chevrolet P20 Van (1970)
- Chevrolet P20 Series (1960-1962)
- Chevrolet P10 Series (1960-1962)
- Chevrolet One-Fifty Series (1953)
- Chevrolet K30 Pickup (1968-1970)
- Chevrolet K20 Suburban (1967-1970)
- Chevrolet K20 Pickup (1960-1962, 1966-1970)
- Chevrolet K10 Suburban (1967-1970)
- Chevrolet K10 Pickup (1960-1962, 1966-1970)
- Chevrolet G20 Van (1970)
- Chevrolet G10 Van (1970)
- Chevrolet El Camino (1964-1970)
- Chevrolet Corvette (1953-1954)
- Chevrolet C30 Pickup (1960-1962, 1966-1970)
- Chevrolet C20 Suburban (1967-1970)
- Chevrolet C20 Pickup (1960-1962, 1966-1970)
- Chevrolet C10 Suburban (1967-1970)
- Chevrolet C10 Pickup (1960-1962, 1966-1970)
- Chevrolet Blazer (1969-1970)
- Chevrolet Biscayne (1960)
- Chevrolet Bel Air (1950-1953, 1959-1960)
AUTOLITE 303 Cross References
We have 102 alternatives for the 303 by AUTOLITE:
- ACCEL 124
- AC-DELCO 43
- AC-DELCO 44
- AC-DELCO B4031
- AC-DELCO B43
- AC-DELCO B45
- AC-DELCO C43
- AC-DELCO C44
- AC-DELCO C45
- AC-DELCO CR43
- AC-DELCO CR43K
- AC-DELCO M44B
- AC-DELCO M44C
- AC-DELCO M45
- AC-DELCO MR44C
- AC-DELCO R43
- AC-DELCO R43C
- AC-DELCO S44
- ALLIS-CHALMERS 79001652
- BOSCH 7508
- BOSCH 7809
- BOSCH 7908
- BOSCH W145T3
- BOSCH W145TR3
- BOSCH W175T3
- BOSCH W7E
- BOSCH W8EC
- BOSCH WR8E
- BOSCH WR8EC
- CATERPILLAR 9B-0444
- CHAMPION 102
- CHAMPION 823
- CHAMPION J10-COM
- CHAMPION J10-COM-J
- CHAMPION J5
- CHAMPION J5J
- CHAMPION J6
- CHAMPION J64J
- CHAMPION J6C
- CHAMPION J6J
- CHAMPION J6JM
- CHAMPION J87B
- CHAMPION J9
- CHAMPION J9J
- CHAMPION RJ6
- CHAMPION RJ6C
- CHAMPION RJ6J
- CHAMPION UJ6
- CHAMPION UJ6M
- CHAMPION XEJ5
- CHAMPION XJ5
- CHAMPION XJ6
- CHAMPION XJ6J
- DENSO 3075
- DENSO 3076
- DENSO 5044
- DENSO W16S
- DENSO W16S-U
- DENSO W17
- DENSO W20S
- DENSO W20SR-U
- DENSO W20S-U
- HARLEY-DAVIDSON HD5
- MIGHTY R41
- MOTORCRAFT 476
- MOTORCRAFT A3X
- MOTORCRAFT A5
- MOTORCRAFT A5X
- MOTORCRAFT AR31
- MOTORCRAFT AR41
- MOTORCRAFT AR51
- MOTORCRAFT AS4C
- MOTORCRAFT AT3
- MOTORCRAFT AT4
- MOTORCRAFT AZ3
- MOTORCRAFT SP-476
- NAPA X502
- NAPA X503
- NAPA X900
- NAPA X901
- NGK 2931
- NGK 3080
- NGK 3510
- NGK 3522
- NGK 3710
- NGK 742
- NGK B6Y
- NGK B7C
- NGK B7S
- NGK BR6S
- PRESTOLITE 14-3
- PRESTOLITE 14-3X
- PRESTOLITE 14-4
- PRESTOLITE 14-5
- PRESTOLITE 14-5X
- PRESTOLITE 14R3
- PRESTOLITE 14R4
- PRESTOLITE 14R5
- SEARS STD361303
- SPLITFIRE SF30C
- SPLITFIRE SM30C
- STITT 407L
AUTOLITE 303 Manufacturer Information
Autolite® allows you to go anywhere—without delay—with its comprehensive spark plugs offerings. Although it was initially established as a buggy lamp manufacturer in 1911, it slowly gained recognition as an ignition expert when it developed and introduced the very first Autolite spark plug in 1935. Over the years, the company has reached greater heights, producing and supplying spark plugs and other ignition parts to some of the major automotive manufacturers, such as Chrysler, Studebaker, Willys, and Packard. Headquartered in Lake Forest, Illinois, Autolite is a proud member of the FRAM Group, North America's largest and most diversified group servicing the vehicle replacement parts market.
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