Bolt Head Identification Markings - ASTM & SAE Standards

   
Grade
Marking
Spec. Material Bolt &
Screw Size
Proof
Load
PSI
Tensile
Strength
Min PSI
Bolt Head Identification At Gears And Stuff SAE-Grade 1  Low Carbon Steel  1/4" - 1-1/2"  33,000 60,000
Bolt Head Identification At Gears And Stuff ASTM-A307 Low Carbon Steel  1/4" - 1/2" 
1-1/2" - 4"  
33,000 60,000
55,000 
Bolt Head Identification At Gears And Stuff SAE-Grade 2  Low Carbon Steel  1/4" - 3/4"
3/4" - 1-1/2" 
55,000
33,000 
74,000
60,000 
Bolt Head Identification At Gears And Stuff SAE-Grade 3  Medium Carbon Steel,
Cold Worked  
1/4" - 1-1/2"
 1/2" - 5/8" 
85,000
80,000 
110,000
100,000 
Bolt Head Identification At Gears And Stuff SAE-Grade 5
ASTM-A 449 
Medium Carbon Steel,
Quenched & Tempered 
1/4" - 1"
Over 1" - 1-1/2"
Over 1-1/2" - 3" 
85,000
74,000
55,000 
120,000
105,000
090,000
Bolt Head Identification At Gears And Stuff ASTM-A 325  Medium Carbon Steel,
Quenched & Tempered 
1/2", 5/8", 3/4"
7/8", 1"
1-1/8" - 1-1/2" 
85,000
78,000
74,000 
120,000
115,000
105,000 
Bolt Head Identification At Gears And Stuff ASTM-A 354
Grade BB 
Low Alloy Steel,
Quenched & Tempered 
1/4" - 2-1/2"
Over 2-1/2" - 4" 
80,000
75,000 
105,000
100,000 
Bolt Head Identification At Gears And Stuff ASTM-A 354
Grade BC
Low Alloy Steel,
Quenched & Tempered 
1/4" - 2-1/2"
Over 2-1/2" -4" 
105,000
095,000 
125,000
115,000 
Bolt Head Identification At Gears And Stuff SAE-Grade 5.1 Low or Medium Carbon 
Steel, Quenched & Tempered,
with Assembled Lock Washer 
Up to 3/8" incl. 85,000 120,000
Bolt Head Identification At Gears And Stuff SAE-Grade 7
Medium Carbon Alloy Steel,
Quenched & Tempered,
Roll Threaded
after Heat Treatment 
1/4" - 1-1/2" 105,000 133,000
Bolt Head Identification At Gears And Stuff SAE-Grade 8 Medium Carbon Alloy
Steel, 
Quenched & Tempered 
1/4" - 1-1/2" 120,000 150,000
Bolt Head Identification At Gears And Stuff ASTM-A 354
Grade BD 
Alloy Steel,
Quenched & Tempered 
1/4" - 1-1/2" 120,000 150,000
Bolt Head Identification At Gears And Stuff ASTM-A 490 Alloy Steel,
Quenched & Tempered 
1/2" - 2-1/2"
Over 2-1/2" - 4" 
120,000
105,000 
150,000
140,000

 


| Home |  | Technical |  | Materials |  | Resources |  | Contact Us |  | Drawings |  | Downloads |

All information contained on this site is for informational purposes only. This information should be independently verified prior to using it on any project. Gears And Stuff accept no liability in the use of this information.

All Rights Reserved ©  2006 Gears And Stuff

If you experience any difficulty with this site, please contact us at steve@rescomservice.net