Harmonic Balancer Bolt and Washer Set for Small Block Chevy 283-400 [7/16-20 x 2.250 in., Grade 8]

Vehicle Info Needed

MR GASKETPART NUMBER: 720-7845

Harmonic Balancer Bolt and Washer Set for Small Block Chevy 283-400 [7/16-20 x 2.250 in., Grade 8]

Name: Harmonic Balancer Bolt and Washer Set for Small Block Chevy 283-400 [7/16-20 x 2.250 in., Grade 8]
Brand: MR GASKET
SKU: 720-7845
Price: 33.52 USD
Availability: InStock

^$33⁵²

Ships on Nov 10, 2026

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^$26⁵³

555-82800

Harmonic Balancer Bolt for Small Block Chevy 283-400 Engines [6-Point Hex Head]

^$6⁹⁹

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Black Finish

Harmonic Balancer Bolt and Washer Set

Small Block Chevy 283-400

7/16-20 x 2.250 in. Bolt

Tall Hex Head

Thick Parallel Ground Washer and Lock Washer

Grade 8 Alloy Steel

Black Oxide Finish

Sold as a Kit

This harmonic balancer bolt and washer set secures the balancer or damper on Small Block Chevy 283-400 engines in stock, high performance street, drag and circle track use. The heat-treated Grade 8 alloy steel bolt has a tall hex head to keep the wrench from slipping, and the extra-thick parallel ground washer provides accurate, uniform torque. A lock washer is also included.

Mr. Gasket 7845 Harmonic Balancer Bolt and Washer Set Features:

Fits Small Block Chevy 283-400
7/16-20 x 2-1/4 in. bolt
Heat-treated Grade 8 alloy steel
Tall hex head prevents wrench slipping
Extra-thick parallel ground washer for uniform torque
Lock washer included
Black oxide coating

Made from Grade-8 alloy material and heat-treated for superior strength, these harmonic balancer bolts feature a high hex head to prevent socket slippage while rotating the engine when degreeing a cam or adjusting the valves. An extra thick, parallel ground washer is provided to allow for a more accurate, uniform torque. Black plated finish, complete with split lock washer to prevent loosening caused by vibration.

Part TypeHarmonic Balancer Bolt

Product LineMr. Gasket Harmonic Balancer Bolts

BrandMR GASKET

Package Height0.4

Package Width4.0

Package Length5.8

Weight0.36 PG

Part CategoryReplacement Parts

ColorBlack

Underhead Length2.25 in (57.2 mm)

QuantitySold as a Kit

Fastener FinishBlack