Skip to main content

Grade 5 Hex Cap Screw, Plated

Selected J429 Grade 5 Hex Cap Screw PlatedGrade 5 Hex Cap Screw, Plated
J429 Grade 5 Hex Cap Screw PlatedGrade 5 Hex Cap Screw, Plated

SAE J429 Grade 5 hex head cap screws are common, economical fasteners manufactured from heat-treated medium carbon steel, quenched and tempered. Grade 5 cap screws are available in diameters from 1/4" through 1 1/2" inclusive. Dimensional specifications are governed by ASME B18.2.1. Grade marking consists of 3 radial lines. Inch series fasteners meeting SAE J429 Grade 5 specifications are general use fasteners commonly used in automotive and construction related industries. These fasteners are available in zinc plated finish. Zinc plating sacrifices itself, corroding before the base material, offering added corrosion resistance.

Products

Chemical Properties

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. 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. 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. 3. When boron is added the limits shall be 0.0005 % to 0.003 %.
  4. 4. For studs only, sulfur content may be 0.13% maximum.

Governing Standards

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 Head Marking
Grade 5 Material Marking

Dimensional Specifications

Finished bolt and cap screw dimensions
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
  1. All dimensions are in inches.
  2. 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″

Mechanical Properties

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