Home / UNC Bolts, Nuts and Washers / 5/16 inch UNC Hex Head Bolts ASME B18.2.1 in Bright Zinc Plated (BZP) USA Grade 5 High Tensile Steel

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5/16 inch UNC Hex Head Bolts ASME B18.2.1 in Bright Zinc Plated (BZP) USA Grade 5 High Tensile Steel

The most common type of fastener, a hex head bolt is designed to be tightened with a standard spanner or ratchet and socket. Popularly used in all assemblies, a standard hex bolt is a staple across the world. Manufactured to ASME B18.2.1, and includes an unthreaded section of the shaft. A hex drive permits a greater torque load to be applied to the joint over most other drive types.

Image of UNC Hex Head Bolts ASME B18.2.1 in BZP-G5 image

technical drawing of UNC Hex Head Bolts ASME B18.2.1

Technical Summary

nominal diameter

5/16

tpi

threads per inch

b nom. (inch)

nominal thread length

0.875

k max. (inch)

head height

0.235

s max. (inch)

drive size

0.500

Standard

ASME B18.2.1 / SAE J429

all dimensions in inches

Datasheet

< View All Sizes

Description	Sale Qtys	Price
Hex Bolt Part Thread UNC 5/16 x 1-3/8 inch in BZP Grade 5 Steel WF28302 - 267 in stock	single bolt for £2.32 or box of 30 for £11.32 or bulk of 150 for £52.39	£0.00
Hex Bolt Part Thread UNC 5/16 x 1-1/2 inch in BZP Grade 5 Steel WF28303 - 337 in stock	sachet of 2 for £2.93 or box of 100 for £43.80 or bulk of 500 for £204.64	£0.00
Hex Bolt Part Thread UNC 5/16 x 1-3/4 inch in BZP Grade 5 Steel WF28304 - 849 in stock	sachet of 2 for £2.53 or box of 100 for £23.13 or bulk of 500 for £102.21	£0.00
Hex Bolt Part Thread UNC 5/16 x 2 inch in BZP Grade 5 Steel WF28305 - 62 in stock	single bolt for £2.57 or box of 80 for £41.20 or bulk of 400 for £191.58	£0.00
Hex Bolt Part Thread UNC 5/16 x 2-1/4 inch in BZP Grade 5 Steel WF28306 - 649 in stock	single bolt for £2.64 or box of 80 for £46.79 or bulk of 400 for £219.16	£0.00
Hex Bolt Part Thread UNC 5/16 x 2-1/2 inch in BZP Grade 5 Steel WF28307 - 342 in stock	single bolt for £2.40 or box of 50 for £19.92 or bulk of 250 for £88.33	£0.00
Hex Bolt Part Thread UNC 5/16 x 2-3/4 inch in BZP Grade 5 Steel WF28308 - 135 in stock	single bolt for £1.78 or box of 50 for £15.40 or bulk of 250 for £67.14	£0.00
Hex Bolt Part Thread UNC 5/16 x 3 inch in BZP Grade 5 Steel WF28309 - 16 in stock	single bolt for £2.76 or box of 60 for £41.94 or bulk of 300 for £195.00	£0.00
Hex Bolt Part Thread UNC 5/16 x 3-1/4 inch in BZP Grade 5 Steel WF28310 - 69 in stock	single bolt for £2.69 or box of 30 for £20.07 or bulk of 150 for £89.18	£0.00
Hex Bolt Part Thread UNC 5/16 x 3-1/2 inch in BZP Grade 5 Steel WF28311 - 102 in stock	single bolt for £3.05 or box of 20 for £21.18 or bulk of 100 for £96.25	£0.00
Hex Bolt Part Thread UNC 5/16 x 3-3/4 inch in BZP Grade 5 Steel WF28312 - 30 in stock	single bolt for £2.54 or box of 15 for £7.53 or bulk of 75 for £34.04	£0.00
Hex Bolt Part Thread UNC 5/16 x 4 inch in BZP Grade 5 Steel WF28313 - 54 in stock	single bolt for £2.65 or box of 50 for £29.61 or bulk of 250 for £133.02	£0.00
Hex Bolt Part Thread UNC 5/16 x 4-1/2 inch in BZP Grade 5 Steel WF28314 - 48 in stock	single bolt for £3.65 or box of 30 for £49.13 or bulk of 150 for £231.88	£0.00
Hex Bolt Part Thread UNC 5/16 x 5 inch in BZP Grade 5 Steel WF28315 - 342 in stock	single bolt for £3.00 or box of 15 for £15.14 or bulk of 75 for £68.09	£0.00
Hex Bolt Part Thread UNC 5/16 x 5-1/2 inch in BZP Grade 5 Steel WF28316 - 86 in stock	single bolt for £3.23 or box of 10 for £12.56 or bulk of 50 for £57.52	£0.00
Hex Bolt Part Thread UNC 5/16 x 6 inch in BZP Grade 5 Steel WF28317 - 25 in stock	single bolt for £3.07 or box of 20 for £21.34 or bulk of 100 for £95.09	£0.00

Hex Bolt Part Thread UNC 5/16 x 1-3/8 inch in BZP Grade 5 Steel
WF28302 - 267 in stock

single bolt for £2.32
or box of 30 for £11.32
or bulk of 150 for £52.39

£0.00

Hex Bolt Part Thread UNC 5/16 x 1-1/2 inch in BZP Grade 5 Steel
WF28303 - 337 in stock

sachet of 2 for £2.93
or box of 100 for £43.80
or bulk of 500 for £204.64

£0.00

Hex Bolt Part Thread UNC 5/16 x 1-3/4 inch in BZP Grade 5 Steel
WF28304 - 849 in stock

sachet of 2 for £2.53
or box of 100 for £23.13
or bulk of 500 for £102.21

£0.00

Hex Bolt Part Thread UNC 5/16 x 2 inch in BZP Grade 5 Steel
WF28305 - 62 in stock

single bolt for £2.57
or box of 80 for £41.20
or bulk of 400 for £191.58

£0.00

Hex Bolt Part Thread UNC 5/16 x 2-1/4 inch in BZP Grade 5 Steel
WF28306 - 649 in stock

single bolt for £2.64
or box of 80 for £46.79
or bulk of 400 for £219.16

£0.00

Hex Bolt Part Thread UNC 5/16 x 2-1/2 inch in BZP Grade 5 Steel
WF28307 - 342 in stock

single bolt for £2.40
or box of 50 for £19.92
or bulk of 250 for £88.33

£0.00

Hex Bolt Part Thread UNC 5/16 x 2-3/4 inch in BZP Grade 5 Steel
WF28308 - 135 in stock

single bolt for £1.78
or box of 50 for £15.40
or bulk of 250 for £67.14

£0.00

Hex Bolt Part Thread UNC 5/16 x 3 inch in BZP Grade 5 Steel
WF28309 - 16 in stock

single bolt for £2.76
or box of 60 for £41.94
or bulk of 300 for £195.00

£0.00

Hex Bolt Part Thread UNC 5/16 x 3-1/4 inch in BZP Grade 5 Steel
WF28310 - 69 in stock

single bolt for £2.69
or box of 30 for £20.07
or bulk of 150 for £89.18

£0.00

Hex Bolt Part Thread UNC 5/16 x 3-1/2 inch in BZP Grade 5 Steel
WF28311 - 102 in stock

single bolt for £3.05
or box of 20 for £21.18
or bulk of 100 for £96.25

£0.00

Hex Bolt Part Thread UNC 5/16 x 3-3/4 inch in BZP Grade 5 Steel
WF28312 - 30 in stock

single bolt for £2.54
or box of 15 for £7.53
or bulk of 75 for £34.04

£0.00

Hex Bolt Part Thread UNC 5/16 x 4 inch in BZP Grade 5 Steel
WF28313 - 54 in stock

single bolt for £2.65
or box of 50 for £29.61
or bulk of 250 for £133.02

£0.00

Hex Bolt Part Thread UNC 5/16 x 4-1/2 inch in BZP Grade 5 Steel
WF28314 - 48 in stock

single bolt for £3.65
or box of 30 for £49.13
or bulk of 150 for £231.88

£0.00

Hex Bolt Part Thread UNC 5/16 x 5 inch in BZP Grade 5 Steel
WF28315 - 342 in stock

single bolt for £3.00
or box of 15 for £15.14
or bulk of 75 for £68.09

£0.00

Hex Bolt Part Thread UNC 5/16 x 5-1/2 inch in BZP Grade 5 Steel
WF28316 - 86 in stock

single bolt for £3.23
or box of 10 for £12.56
or bulk of 50 for £57.52

£0.00

Hex Bolt Part Thread UNC 5/16 x 6 inch in BZP Grade 5 Steel
WF28317 - 25 in stock

single bolt for £3.07
or box of 20 for £21.34
or bulk of 100 for £95.09

£0.00

Prices are subject to quantity discounts based on a sliding scale. Enter the desired quantity in the relevant box in the table above. This will automatically calculate a line price indicating the applicable rate for the quantities selected. All prices shown exclude VAT.

Technical Summary

nominal diameter

5/16

tpi

threads per inch

b nom. (inch)

nominal thread length

0.875

k max. (inch)

head height

0.235

s max. (inch)

drive size

0.500

Standard

ASME B18.2.1 / SAE J429

all dimensions in inches

Datasheet