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Home
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Fasteners
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Hex Bolts and Cap Screws
>
Grade 5 Hex Cap Screw, Plated
>
5/16-18 X 8 J429 GRADE 5 HEX CAP SCREW, PLATED
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5/16-18 X 8 J429 GRADE 5 HEX CAP SCREW, PLATED
Item #:
HHP50310800
5/16-18 X 8 J429 GRADE 5 HEX CAP SCREW, PLATED
$1.34536/EA
Quantity
Price
Quantity
Price
1
$1.34536/ EA
60
$1.26038/ EA
230
$1.12243/ EA
1020
$0.74381/ EA
Qty
In Stock
Add To Cart
Technical Data
Product Specification
Governing Standards
Mechanical Properties
Chemical Properties
Dimensional Specifications
Product Specification
Weight
0.177,
Thread Length
1.1250
Length
8
Diameter
5/16
Grades
Grade 5
Thread Type
Coarse
Material
Steel
Item Type
Hex Bolt/Cap Screw
Finish
Plated
Body Diameter
5/16
Head Type
Hex
Governing Standards
Governing Standards
Grade 5
SAE J429
Covers the mechanical and material requirements for inch series fasteners used in automotive and related industries in diameters through 1-1/2″.
ASME B18.2.1
Covers the complete general and dimensional data for multiple types of inch series square and hex bolts and screws.
ASME B1.1 UNC & UNF Class 2A
Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.
Grade 5 Material Marking
Mechanical Properties
Mechanical Properties
Grade 5
Medium Carbon Steel, Heat Treated, Quenched and Tempered
Per SAE J429 2014-05
Diameter
Full Size
Proof Load
Yield
Strength
Tensile
Strength
Elongation
Reduction
in Area
Core Hardness
psi
Min psi
Min psi
Min %
Min %
Rockwell
1/4 thru 1"
85,000
92,000
120,000
14
35
C25 to C34
Over 1 thru 1 1/2"
74,000
81,000
105,000
14
35
C19 to C30
Chemical Properties
Chemical Properties
Grade 5
Per SAE J429 2014-05
Grade
Material
Carbon
Phosphorus
Sulfur
Boron
Tempering
Temperature
% by weight
% by weight
% by weight
% by weight
Min
5
Medium Carbon Steel (1)
0.25-0.55
0.025 max
0.025 max (4)
-
800F
Carbon Steel with additives (e.g.
Boron (2 or 3) or Cr, or Mn)
0.15-0.40
0.025 max
0.025 max (4)
0.0005-0.003
800F
1. For Grades 5 and 5.1, fasteners, alloy steels, as specified for Grades 8 fasteners, may also be used at the manufacturer's option.
2. When the carbon content in boron steel is less than 0.25% the minimum manganese shall be 0.60%for Grades 5, 5.1, and 5.2 and 0.70% for Grades 8.2.
3. When boron is added the limits shall be 0.0005 % to 0.003 %.
4. For studs only, sulfur content may be 0.13% maximum.
Dimensional Specifications
Dimensional Specifications
Grade 5
Per ASME B18.2.1-2012
Nominal Diameter
UNC
UNF
E
F
G
H
J
LT
Y
Body Diameter
Width Across Flats
Width Across Corners
Head Height
Wrench
Height
Thread Length
Transition
Length
Max
Min
Basic
Max
Min
Max
Min
Basic
Max
Min
Min
Lengths
up to 6"
Lengths
> 6"
Max
1/4
0.2500
20
28
0.2500
0.2405
7/16
0.4380
0.4280
0.5050
0.4880
5/32
0.1630
0.1500
0.1060
0.7500
1.0000
0.2500
5/16
0.3125
18
24
0.3125
0.3065
1/2
0.5000
0.4890
0.5770
0.5570
13/64
0.2110
0.1950
0.1400
0.8750
1.1250
0.2750
3/8
0.3750
16
24
0.3750
0.3690
9/16
0.5620
0.5510
0.6500
0.6280
15/64
0.2430
0.2260
0.1600
1.0000
1.2500
0.3120
7/16
0.4375
14
20
0.4375
0.4305
5/8
0.6250
0.6120
0.7220
0.6980
9/32
0.2910
0.2720
0.1950
1.1250
1.3750
0.3570
1/2
0.5000
13
20
0.5000
0.4930
3/4
0.7500
0.7360
0.8660
0.8400
5/16
0.3230
0.3020
0.2150
1.2500
1.5000
0.3850
9/16
0.5625
12
18
0.5625
0.5545
13/16
0.8120
0.7980
0.9380
0.9100
23/64
0.3710
0.3480
0.2500
1.3750
1.6250
0.4170
5/8
0.6250
11
18
0.6250
0.6170
15/16
0.9380
0.9220
1.0830
1.0510
25/64
0.4030
0.3780
0.2690
1.5000
1.7500
0.4550
3/4
0.7500
10
16
0.7500
0.7410
1 1/8
1.1250
1.1000
1.2990
1.2540
15/32
0.4830
0.4550
0.3240
1.7500
2.0000
0.5000
7/8
0.8750
9
14
0.8750
0.8660
1 5/16
1.3120
1.2850
1.5160
1.4650
35/64
0.5630
0.5310
0.3780
2.0000
2.2500
0.5560
1
1.0000
8
14
1.0000
0.9900
1 1/2
1.5000
1.4690
1.7320
1.6750
39/64
0.6270
0.5910
0.4160
2.2500
2.5000
0.6250
1 1/8
1.1250
7
12
1.1250
1.1140
1 11/16
1.6880
1.6310
1.9490
1.8590
11/16
0.7180
0.6580
0.4610
2.5000
2.7500
0.7140
1 1/4
1.2500
7
12
1.2500
1.2390
1 7/8
1.8750
1.8120
2.1650
2.0660
25/32
0.8130
0.7490
0.5300
2.7500
3.0000
0.7140
1 3/8
1.3750
6
12
1.3750
1.3630
2 1/16
2.0620
1.9940
2.3820
2.2730
27/32
0.8780
0.8100
0.5690
3.0000
3.2500
0.8330
1 1/2
1.5000
6
12
1.5000
1.4880
2 1/4
2.2500
2.1750
2.5980
2.4800
15/16
0.9740
0.9020
0.6400
3.2500
3.5000
0.8330
All dimensions are in inches.
Usable thread length for Hex Head Cap Screws under 6 1/4" long can be approximated by the equation THREAD LENGTH = (2 X DIAMETER) + 1/4″