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HF-P0293-UNFRFQ only
Hex Head Bolt — ASME 18.2.1 UNF1/4-28 3/8-24 1/2-20 3/4-16 7/8-14 7/16inch Black Zinc Black Oxide Steel Grade 8 Hexagon Head Bolt Hex Head Bolts
Product visual referenceDimensions confirmed with quotation

ASME B18.2.1 · Grade 8

ASME 18.2.1 UNF1/4-28 7/16inch Black Zinc Black Oxide Steel Grade 8 Hexagon Head Bolt Hex Head Bolts

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

Material
Steel
Thread series
UNF
Finish
Black Oxide
Drive
External Hex
Quoted to orderSend one complete specification.

Size · length · quantity · finish · delivery target

SKU HHB-STL-G8-UNF-1-4-28
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Catalog recordHF-P0293-UNF
Thread systemUNF
Configurations5
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
1/4-281/4 · 28 TPI
Length confirmed with RFQ
1
3/8-243/8 · 24 TPI
Length confirmed with RFQ
1
1/2-201/2 · 20 TPI
Length confirmed with RFQ
1
3/4-163/4 · 16 TPI
Length confirmed with RFQ
1
7/8-147/8 · 14 TPI
Length confirmed with RFQ
1

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-P0293-UNF
02
Product type
Hex Head Bolt
03
Material
Steel
04
Standard
ASME B18.2.1
05
Grade / class
Grade 8
06
Finish
Black Oxide
07
Thread series
UNF
08
Drive type
External Hex

Same product family

Related specifications.

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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