HF-P0181-UNCRFQ only

Hex Head Bolt — Black Zinc Plated Hexagon Head Bolt UNC 1/4-20 3/8-16 1/2-13 3/4-10 7/16-14 Grade 8 10B21 Steel Hex Bolt

Product visual referenceDimensions confirmed with quotation

ASME B18.2.1 · Grade 8

Black Zinc Plated Hexagon Head Bolt UNC Grade 8 10B21 Steel Hex Bolt

Hex Head Bolt manufactured in 10B21 Carbon Steel to ASME B18.2.1. Choose a size and length below, then send your quantity and documentation requirements for quotation.

Material: 10B21 Carbon Steel
Thread series: UNC
Finish: Black Zinc
Drive: External Hex

Quoted to orderSend one complete specification.

Size · length · quantity · finish · delivery target

Nominal thread

Length

Quantity

SKU HHB-10B21-G8-UNC-1-4-20X8

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Catalog recordHF-P0181-UNC

Thread systemUNC

Configurations45

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

3/8-163/8 · 16 TPI

8 in5 in3 in1 in6 in7 in2 in1/2 in3/8 in

9

1/2-131/2 · 13 TPI

8 in5 in3 in1 in6 in7 in2 in1/2 in3/8 in

9

3/4-103/4 · 10 TPI

8 in5 in3 in1 in6 in7 in2 in1/2 in3/8 in

9

7/16-147/16 · 14 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.

Product code: HF-P0181-UNC
Product type: Hex Head Bolt
Material: 10B21 Carbon Steel
Standard: ASME B18.2.1
Grade / class: Grade 8
Finish: Black Zinc
Thread series: UNC
Drive type: External Hex

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