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HF-P0273-UNCRFQ only
Hex Head Bolt — Industrial Grade 8 Hex Head Bolt UNC 1/4-20 to 7/8-9 Black Zinc Carbon Steel for Construction Equipment
Product visual referenceDimensions confirmed with quotation

ASME B18.2.1 · Grade 8

Industrial Grade 8 Hex Head Bolt UNC Black Zinc Carbon Steel for Construction Equipment

Hex Head Bolt manufactured in Carbon Steel to ASME B18.2.1. Choose a size and length below, then send your quantity and documentation requirements for quotation.

Material
Carbon Steel
Thread series
UNC
Finish
Black Zinc
Drive
External Hex
Quoted to orderSend one complete specification.

Size · length · quantity · finish · delivery target

SKU HHB-CS-G8-UNC-1-4-20X8
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Catalog recordHF-P0273-UNC
Thread systemUNC
Configurations18
Supply modeMade to specification

Sizes & configurations

Choose diameter and length.

Browse the listed sizes. Where no length is listed, include the required overall length with your RFQ. Thread details and dimensions are confirmed during quotation.
Nominal threadRecorded lengthsRows
1/4-201/4 · 20 TPI
8 in5 in3 in1 in6 in7 in2 in1/2 in3/8 in
9
7/8-97/8 · 9 TPI
8 in5 in3 in1 in6 in7 in2 in1/2 in3/8 in
9

Need a size not shown? Send the standard, thread designation and drawing. Custom and non-standard configurations are reviewed individually.

Technical dossier

Specification at a glance.

Use these specifications for product selection. Final tolerances, dimensions and inspection requirements are confirmed before production.
01
Product code
HF-P0273-UNC
02
Product type
Hex Head Bolt
03
Material
Carbon Steel
04
Standard
ASME B18.2.1
05
Grade / class
Grade 8
06
Finish
Black Zinc
07
Thread series
UNC
08
Drive type
External Hex

Same product family

Related specifications.

View the full series

Engineering review before quotation

Specify it once. Quote it correctly.

Send the size, length, quantity and any drawing or inspection requirement. We will confirm manufacturability, MOQ and lead time before you commit.
Request a Quote Send Drawing