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ARP

Back the early 1970s, racing enthusiast Gary Holzapfel saw that many of his friends’ broken engines were caused by fastener failure. At the time, there were no commercially available studs and bolts up to the challenge. So Holzapfel called upon his many years of fastener making experience for a leading aerospace subcontractor and founded ARP (Automotive Racing Products). ARP’s product line contains thousands of part numbers, and has expanded to include virtually every fastener found in an engine and driveline and throughout the suspension and frame. These range from quality high performance OEM replacement parts to exotic specialty hardware for Formula 1, IndyCar, NASCAR and NHRA drag racing and marine applications.

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Conn. Rod Washers - 7/16 ID x .675 OD Chamfer(10)

ARP
$8.99 - $8.99
$8.99
$12.99
$12.99 - $12.99
$12.99

Flat Washer - Special Purpose - Chamfered - 0.438 in ID - 0.75 in OD - 0.073 in Thick - Chromoly - Black Oxide - Set of 10

$8.99 - $8.99
$8.99
$12.99
$12.99 - $12.99
$12.99

Conn. Rod Washers - 7/16 ID x .675 OD Chamfer(10)

ARP
$8.99 - $8.99
$8.99
$11.99
$11.99 - $11.99
$11.99

Flat Washer - Special Purpose - Chamfered - 0.438 in ID - 0.675 in OD - 0.062 in Thick - Chromoly - Black Oxide - Set of 10

$8.99 - $8.99
$8.99
$11.99
$11.99 - $11.99
$11.99

Hex Nut Kit w/Flange 5/16-24 (10pk)

ARP
$16.99 - $16.99
$16.99
$20.99
$20.99 - $20.99
$20.99

Nut - Locking - 5/16-24 in Thread - 3/8 in Hex Head - Serrated Flange - Chromoly - Black Oxide - Set of 10

$16.99 - $16.99
$16.99
$20.99
$20.99 - $20.99
$20.99

1/4 ID x .550 OD Black Washers No-Chamfer 10pk

ARP
$2.99 - $2.99
$2.99
$2.99
$2.99 - $2.99
$2.99

Flat Washer - Special Purpose - 0.25 in ID - 0.55 in OD - 0.075 in Thick - Chromoly - Black Oxide - Set of 10

$2.99 - $2.99
$2.99
$2.99
$2.99 - $2.99
$2.99

1/4 ID .550 OD Washers 10pk - Black

ARP
$2.99 - $2.99
$2.99
$3.99
$3.99 - $3.99
$3.99

Flat Washer - Special Purpose - Chamfered - 0.25 in ID - 0.55 in OD - 0.075 in Thick - Chromoly - Black Oxide - Set of 10

$2.99 - $2.99
$2.99
$3.99
$3.99 - $3.99
$3.99

Hex Serrated Flange Nuts 5/16-24 (10)

ARP
$6.99 - $6.99
$6.99
$6.99
$6.99 - $6.99
$6.99

Nut - Locking - 5/16-24 in Thread - 1/2 in Hex Head - Serrated Flange - Steel - Cadmium - Set of 10

$6.99 - $6.99
$6.99
$6.99
$6.99 - $6.99
$6.99

Hex Nuts - 3/8-24 (10)

ARP
$6.99 - $6.99
$6.99
$6.99
$6.99 - $6.99
$6.99

Nut - Locking - 3/8-24 in Thread - 9/16 in Hex Head - Serrated Flange - Steel - Cadmium - Set of 10

$6.99 - $6.99
$6.99
$6.99
$6.99 - $6.99
$6.99

Black Washers - 8mm ID x .575 OD (10)

ARP
$8.99 - $8.99
$8.99
$9.99
$9.99 - $9.99
$9.99

Flat Washer - Special Purpose - 8 mm ID - 0.575 in OD - 0.06 in Thick - Chromoly - Black Oxide - Set of 10

$8.99 - $8.99
$8.99
$9.99
$9.99 - $9.99
$9.99

Hex Nuts - 1/4-28 (10)

ARP
$6.99 - $6.99
$6.99
$10.99
$10.99 - $10.99
$10.99

Nut - Locking - 1/4-28 in Thread - 7/16 in Hex Head - Serrated Flange - Steel - Cadmium - Set of 10

$6.99 - $6.99
$6.99
$10.99
$10.99 - $10.99
$10.99
Save 6% Save %

Hex Nuts - 1/2-20 (10)

ARP
$17.99
$17.99 - $17.99
$17.99
$16.99
$16.99 - $16.99
$16.99

Nut - 1/2-20 in Thread - 3/4 in Hex Head - Chromoly - Black Oxide - Set of 10

$17.99
$17.99 - $17.99
$17.99
$16.99
$16.99 - $16.99
$16.99
Save 6% Save %

Hex Nuts - 7/16-20 (10)

ARP
$19.99 - $19.99
$19.99
$25.99
$25.99 - $25.99
$25.99

Nut - 7/16-20 in Thread - 11/16 in Hex Head - Chromoly - Black Oxide - Set of 10

$19.99 - $19.99
$19.99
$25.99
$25.99 - $25.99
$25.99
Save 5% Save %

Hex Nuts - 7/16-20 (10)

ARP
$19.99
$19.99 - $19.99
$19.99
$18.99
$18.99 - $18.99
$18.99

Nut - 7/16-20 in Thread - 5/8 in Hex Head - Chromoly - Black Oxide - Set of 10

$19.99
$19.99 - $19.99
$19.99
$18.99
$18.99 - $18.99
$18.99
Save 5% Save %

Hex Nuts - 3/8-24 (10)

ARP
$6.99 - $6.99
$6.99
$6.99
$6.99 - $6.99
$6.99

Nut - 3/8-24 in Thread - 9/16 in Hex Head - Chromoly - Black Oxide - Set of 10

$6.99 - $6.99
$6.99
$6.99
$6.99 - $6.99
$6.99

5/16-24 Hex Nut Kit 10pk

ARP
$6.99 - $6.99
$6.99
$6.99
$6.99 - $6.99
$6.99

Nut - 5/16-24 in Thread - 1/2 in Hex Head - Chromoly - Black Oxide - Set of 10

$6.99 - $6.99
$6.99
$6.99
$6.99 - $6.99
$6.99

1/4-28 Hex Nut w/Flange Kit (10pk)

ARP
$15.99 - $15.99
$15.99
$20.99
$20.99 - $20.99
$20.99

Nut - 1/4-28 in Thread - 7/16 in Hex Head - Chromoly - Black Oxide - Set of 10

$15.99 - $15.99
$15.99
$20.99
$20.99 - $20.99
$20.99

Hex Nuts - 5/16-24 (10)

ARP
$6.99 - $6.99
$6.99
$6.99
$6.99 - $6.99
$6.99

Nut - Locking - 5/16-24 in Thread - 1/2 in Hex Head - Serrated Flange - Steel - Cadmium - Set of 10

$6.99 - $6.99
$6.99
$6.99
$6.99 - $6.99
$6.99

Black Washers - 3/8ID x .625 OD Chamfer (10)

ARP
$8.99 - $8.99
$8.99
$11.99
$11.99 - $11.99
$11.99

Flat Washer - Chamfered - 0.375 in ID - 0.625 in OD - 0.12 in Thick - Chromoly - Black Oxide - Set of 10

$8.99 - $8.99
$8.99
$11.99
$11.99 - $11.99
$11.99

Hex Nut - 1/2-20 (1)

ARP
$2.99 - $2.99
$2.99
$2.99
$2.99 - $2.99
$2.99

Nut - 1/2-20 in Thread - 3/4 in Hex Head - Chromoly - Black Oxide - Each

$2.99 - $2.99
$2.99
$2.99
$2.99 - $2.99
$2.99

Hex Nut - 7/16-20 (1)

ARP
$2.99 - $2.99
$2.99
$2.99
$2.99 - $2.99
$2.99

Nut - 7/16-20 in Thread - 11/16 in Hex Head - Chromoly - Black Oxide - Each

$2.99 - $2.99
$2.99
$2.99
$2.99 - $2.99
$2.99

Hex Nut - 7/16-20 (1)

ARP
$2.99 - $2.99
$2.99
$3.99
$3.99 - $3.99
$3.99

Nut - 7/16-20 in Thread - 5/8 in Hex Head - Chromoly - Black Oxide - Each

$2.99 - $2.99
$2.99
$3.99
$3.99 - $3.99
$3.99

Hex Nut - 3/8-24 (1)

ARP
$1.99 - $1.99
$1.99
$1.99
$1.99 - $1.99
$1.99

Nut - 3/8-24 in Thread - 9/16 in Hex Head - Chromoly - Black Oxide - Each

$1.99 - $1.99
$1.99
$1.99
$1.99 - $1.99
$1.99

Hex Nut - 5/16-24 (1)

ARP
$1.99 - $1.99
$1.99
$1.99
$1.99 - $1.99
$1.99

Nut - 5/16-24 in Thread - 1/2 in Hex Head - Chromoly - Black Oxide - Each

$1.99 - $1.99
$1.99
$1.99
$1.99 - $1.99
$1.99
Save 2% Save %

Insert Washers - 7/16 ID x .875 OD (10)

ARP
$49.99
$49.99 - $49.99
$49.99
$48.99
$48.99 - $48.99
$48.99

Head Bolt Washer - 0.875 in OD - 0.438 in ID - 0.529 in Insert OD - Chromoly - Black Oxide - Head Bolts - Set of 10

$49.99
$49.99 - $49.99
$49.99
$48.99
$48.99 - $48.99
$48.99
Save 2% Save %
Save 25% Save %

Black Washer - 5/16 ID x .550 OD (1)

ARP
$1.99
$1.99 - $1.99
$1.99
$1.49
$1.49 - $1.49
$1.49

Flat Washer - Special Purpose - 0.313 in ID - 0.55 in OD - 0.12 in Thick - Chromoly - Black Oxide - Each

$1.99
$1.99 - $1.99
$1.99
$1.49
$1.49 - $1.49
$1.49
Save 25% Save %