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Low Head Socket Cap Screw ASME B18.3

ASME B18.3 (Current)

Material
Stainless Steel, Alloy Steel
Property Class
AF, CW
Finish
Passivated, Plain, Blackened
Size range
#6-32UNC, #8-32UNC, #10-24UNC + 5 more
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Select sizes and quantities — 87 confirmed sizes to ASME B18.3

Material
Grade
Finish
dNominal Diameter (in)lLength (in)sHex Socket Size (in)dkHead Diameter (in)kNominal Head Height (in)dBasic Major Diameter (in)MOQQuantity and inquiry
#6-32 UNC0.250.0620.2260.0720.1383000
#6-32 UNC0.31250.0620.2260.0720.1383000
#6-32 UNC0.3750.0620.2260.0720.1383000
#6-32 UNC0.43750.0620.2260.0720.1383000
#6-32 UNC0.50.0620.2260.0720.1383000
#6-32 UNC0.6250.0620.2260.0720.1383000
#6-32 UNC0.750.0620.2260.0720.1383000
#6-32 UNC0.8750.0620.2260.0720.1383000
#6-32 UNC10.0620.2260.0720.1383000
#8-32 UNC0.31250.0780.270.0850.1643000
#8-32 UNC0.3750.0780.270.0850.1643000
#8-32 UNC0.43750.0780.270.0850.1643000
#8-32 UNC0.50.0780.270.0850.1643000
#8-32 UNC0.6250.0780.270.0850.1643000
#8-32 UNC0.750.0780.270.0850.1643000
#8-32 UNC0.8750.0780.270.0850.1643000

Showing 16 of 87 sizes

#6-32 UNC × 0.25 × 0.062 × 0.226 × 0.072 × 0.138 × 32 × UNC × 3A × 0.138 × 0.1329 × 0.218 × 0.066 × 0.013 × 0.05 × 0.008

dNominal Diameter (in)#6-32 UNC
lLength (in)0.25
sHex Socket Size (in)0.062
dkHead Diameter (in)0.226
kNominal Head Height (in)0.072
dBasic Major Diameter (in)0.138
MOQ3000

#6-32 UNC × 0.3125 × 0.062 × 0.226 × 0.072 × 0.138 × 32 × UNC × 3A × 0.138 × 0.1329 × 0.218 × 0.066 × 0.013 × 0.05 × 0.008

dNominal Diameter (in)#6-32 UNC
lLength (in)0.3125
sHex Socket Size (in)0.062
dkHead Diameter (in)0.226
kNominal Head Height (in)0.072
dBasic Major Diameter (in)0.138
MOQ3000

#6-32 UNC × 0.375 × 0.062 × 0.226 × 0.072 × 0.138 × 32 × UNC × 3A × 0.138 × 0.1329 × 0.218 × 0.066 × 0.013 × 0.05 × 0.008

dNominal Diameter (in)#6-32 UNC
lLength (in)0.375
sHex Socket Size (in)0.062
dkHead Diameter (in)0.226
kNominal Head Height (in)0.072
dBasic Major Diameter (in)0.138
MOQ3000

#6-32 UNC × 0.4375 × 0.062 × 0.226 × 0.072 × 0.138 × 32 × UNC × 3A × 0.138 × 0.1329 × 0.218 × 0.066 × 0.013 × 0.05 × 0.008

dNominal Diameter (in)#6-32 UNC
lLength (in)0.4375
sHex Socket Size (in)0.062
dkHead Diameter (in)0.226
kNominal Head Height (in)0.072
dBasic Major Diameter (in)0.138
MOQ3000

#6-32 UNC × 0.5 × 0.062 × 0.226 × 0.072 × 0.138 × 32 × UNC × 3A × 0.138 × 0.1329 × 0.218 × 0.066 × 0.013 × 0.05 × 0.008

dNominal Diameter (in)#6-32 UNC
lLength (in)0.5
sHex Socket Size (in)0.062
dkHead Diameter (in)0.226
kNominal Head Height (in)0.072
dBasic Major Diameter (in)0.138
MOQ3000

#6-32 UNC × 0.625 × 0.062 × 0.226 × 0.072 × 0.138 × 32 × UNC × 3A × 0.138 × 0.1329 × 0.218 × 0.066 × 0.013 × 0.05 × 0.008

dNominal Diameter (in)#6-32 UNC
lLength (in)0.625
sHex Socket Size (in)0.062
dkHead Diameter (in)0.226
kNominal Head Height (in)0.072
dBasic Major Diameter (in)0.138
MOQ3000

#6-32 UNC × 0.75 × 0.062 × 0.226 × 0.072 × 0.138 × 32 × UNC × 3A × 0.138 × 0.1329 × 0.218 × 0.066 × 0.013 × 0.05 × 0.008

dNominal Diameter (in)#6-32 UNC
lLength (in)0.75
sHex Socket Size (in)0.062
dkHead Diameter (in)0.226
kNominal Head Height (in)0.072
dBasic Major Diameter (in)0.138
MOQ3000

#6-32 UNC × 0.875 × 0.062 × 0.226 × 0.072 × 0.138 × 32 × UNC × 3A × 0.138 × 0.1329 × 0.218 × 0.066 × 0.013 × 0.05 × 0.008

dNominal Diameter (in)#6-32 UNC
lLength (in)0.875
sHex Socket Size (in)0.062
dkHead Diameter (in)0.226
kNominal Head Height (in)0.072
dBasic Major Diameter (in)0.138
MOQ3000

#6-32 UNC × 1 × 0.062 × 0.226 × 0.072 × 0.138 × 32 × UNC × 3A × 0.138 × 0.1329 × 0.218 × 0.066 × 0.013 × 0.05 × 0.008

dNominal Diameter (in)#6-32 UNC
lLength (in)1
sHex Socket Size (in)0.062
dkHead Diameter (in)0.226
kNominal Head Height (in)0.072
dBasic Major Diameter (in)0.138
MOQ3000

#8-32 UNC × 0.3125 × 0.078 × 0.27 × 0.085 × 0.164 × 32 × UNC × 3A × 0.164 × 0.1585 × 0.262 × 0.079 × 0.014 × 0.06 × 0.008

dNominal Diameter (in)#8-32 UNC
lLength (in)0.3125
sHex Socket Size (in)0.078
dkHead Diameter (in)0.27
kNominal Head Height (in)0.085
dBasic Major Diameter (in)0.164
MOQ3000

#8-32 UNC × 0.375 × 0.078 × 0.27 × 0.085 × 0.164 × 32 × UNC × 3A × 0.164 × 0.1585 × 0.262 × 0.079 × 0.014 × 0.06 × 0.008

dNominal Diameter (in)#8-32 UNC
lLength (in)0.375
sHex Socket Size (in)0.078
dkHead Diameter (in)0.27
kNominal Head Height (in)0.085
dBasic Major Diameter (in)0.164
MOQ3000

#8-32 UNC × 0.4375 × 0.078 × 0.27 × 0.085 × 0.164 × 32 × UNC × 3A × 0.164 × 0.1585 × 0.262 × 0.079 × 0.014 × 0.06 × 0.008

dNominal Diameter (in)#8-32 UNC
lLength (in)0.4375
sHex Socket Size (in)0.078
dkHead Diameter (in)0.27
kNominal Head Height (in)0.085
dBasic Major Diameter (in)0.164
MOQ3000

#8-32 UNC × 0.5 × 0.078 × 0.27 × 0.085 × 0.164 × 32 × UNC × 3A × 0.164 × 0.1585 × 0.262 × 0.079 × 0.014 × 0.06 × 0.008

dNominal Diameter (in)#8-32 UNC
lLength (in)0.5
sHex Socket Size (in)0.078
dkHead Diameter (in)0.27
kNominal Head Height (in)0.085
dBasic Major Diameter (in)0.164
MOQ3000

#8-32 UNC × 0.625 × 0.078 × 0.27 × 0.085 × 0.164 × 32 × UNC × 3A × 0.164 × 0.1585 × 0.262 × 0.079 × 0.014 × 0.06 × 0.008

dNominal Diameter (in)#8-32 UNC
lLength (in)0.625
sHex Socket Size (in)0.078
dkHead Diameter (in)0.27
kNominal Head Height (in)0.085
dBasic Major Diameter (in)0.164
MOQ3000

#8-32 UNC × 0.75 × 0.078 × 0.27 × 0.085 × 0.164 × 32 × UNC × 3A × 0.164 × 0.1585 × 0.262 × 0.079 × 0.014 × 0.06 × 0.008

dNominal Diameter (in)#8-32 UNC
lLength (in)0.75
sHex Socket Size (in)0.078
dkHead Diameter (in)0.27
kNominal Head Height (in)0.085
dBasic Major Diameter (in)0.164
MOQ3000

#8-32 UNC × 0.875 × 0.078 × 0.27 × 0.085 × 0.164 × 32 × UNC × 3A × 0.164 × 0.1585 × 0.262 × 0.079 × 0.014 × 0.06 × 0.008

dNominal Diameter (in)#8-32 UNC
lLength (in)0.875
sHex Socket Size (in)0.078
dkHead Diameter (in)0.27
kNominal Head Height (in)0.085
dBasic Major Diameter (in)0.164
MOQ3000

Product details

Description
Low head socket cap screw manufactured to ASME B18.3. The head is cylindrical with a hexagon socket drive and a reduced height compared to standard socket cap screws. Threads are UNC with class 3A fit, available in sizes from #6-32 to 5/8-11. Supply materials are stainless steel and alloy steel, with finishes blackened, passivated, or plain. Minimum order quantities vary by size. For quotation, specify diameter, thread series, material, finish, and required quantity.
Features
Cylindrical low-profile head with hexagon socket drive · UNC threads, class 3A, from #6-32 to 5/8-11 · Available in stainless steel and alloy steel · Finishes: blackened, passivated, or plain
Applications
Machine tool and jig assembly, Compact joints where a counterbored seat is used, Automation and equipment frames, Mould and die assembly

Order assurance

Confirmed for the quoted product and order.

Reports & inspection

Agreed in the quotation.

  • EN 10204 3.1 material certificate
  • Dimensional inspection report
  • Certificate of conformity
  • Mechanical test report
  • Chemical analysis report
  • Batch and lot traceability

Packaging & delivery

Options we supply.

  • Bulk carton packing
  • Small boxes with outer cartons
  • Palletized shipment
  • Fumigation-free pallets
  • Inner poly bags
  • Buyer branding and labels

Product questions

What sizes of Low Head Socket Cap Screw ASME B18.3 do you supply?

Execution standard: ASME B18.3. The confirmed specification table covers 1–10 diameters and 0.25–3 lengths. Use the specification table to select the exact variant required for quotation.

Which materials, grades and finishes can I order?

Material: Stainless Steel, Alloy Steel; Property class: AF, CW; Finish: Passivated, Plain, Blackened. Availability should be confirmed against the selected specification and order quantity.

Where are these low head cap screws typically used?

Typical applications include Machine tool and jig assembly, Compact joints where a counterbored seat is used, Automation and equipment frames, Mould and die assembly. Final suitability depends on the selected material, grade, finish and operating conditions.

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Quote Low Head Socket Cap Screw ASME B18.3

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