Skip to main content

ASTM F835 TECHNICAL DATA

Order Flat Socket Cap Screws Order Button Head Machine Screws

This specification covers the requirements for quenched and tempered alloy steel hexagon socket button and flat countersunk head cap screws.

 

 

Technical Data: ASTM F835 Chemical RequirementsASTM F835 Mechanical RequirementsASTM F835 Minimum Ultimate Tensile Loads

Chemical Requirements

  Composition, %
Element Heat
Analysis

Product Analysis
Carbon 0.30 to 0.48 0.28 to 0.50
Phosphorus, max 0.035 0.040
Sulfur, max 0.040 0.045
Alloying elements see 5.2 see 5.2

Mechanical Requirements

  Nominal Thread Size, in.
0.500 and
smaller		 Over 0.500
Full-size Screws:    
Tensile, min,   ksi 145 135
Machined Test   Specimen:    
Yield strength at 0.2 % offset, min, ksi A 153
Tensile strength, min, ksi A 170
Elongation in 4 D, min, % A 8
Reduction of area, min, % A 35
Product Hardness:    
Rockwell C 39-44 37-44
Vickers DPH 382-434 363-434

 

A not applicable

Minimum Ultimate Tensile Loads

Thread Size Stress Area, in.2 Button and Countersunk
Heads, Tensile Load,
min lbA
Coarse Fine Coarse Fine

Coarse
Thread

Series

 Fine Thread
Series
  0.060-80   0.00180   260
0.073-64 0.073-72 0.00263 0.00278 380 400
0.086-56 0.086-64 0.00370 0.00394 540 570
0.099-48 0.099-56 0.00487 0.00523 710 760
0.112-40 0.112-48 0.00604 0.00661 880 960
0.125-40 0.125-44 0.00796 0.00830 1150 1200
0.138-32 0.138-40 0.00909 0.01015 1320 1470
0.164-32 0.164-36 0.0140 0.01474 2030 2140
0.190-24 0.190-32 0.0175 0.0200 2540 2900
0.250-20 0.250-28 0.0318 0.0384 4610 5275
0.3125-18 0.3125-24 0.0524 0.0580 7600 8450
0.375-16 0.375-24 0.0775 0.0878 11200 12700
0.4375-14 0.4375-20 0.1063 0.1187 15400 17000
0.500-13 0.500-20 0.1419 0.1599 20600 23200
0.625-11 0.625-18 0.226 0.258 30500 34500
0.750-10 0.750-16 0.334 0.373 45100 50700
0.875-9 0.875-14 0.462 0.509 62400 69200
1.000-8 1.000-12 0.606 0.663 81800 90400
1.125-7 1.125-12 0.763 0.858 103000 116400
1.250-7 1.250-12 0.969 1.073 131000 146000
1.375-6 1.375-12 1.155 1.315 156000 179000
1.500-6 1.500-12 1.405 1.581 190000 215000

A Because of the head critical configuration of these parts, the full size tensile loads are based on 80 % of the minimum heat treated material strength (180 ksi for sizes 0.500 in. and smaller and 170 ksi for sizes larger than 0.500 in.) and the stress areas for coarse thread screws.