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Socket Screws

Socket head cap screws to ASME B18.3, DIN 912 and ISO 4762, UNC and UNF from #0 to 1-1/2 in. High-tensile alloy steel reaches Grade 12.9 (35CrMo / 40CrMo) with black oxide or yellow zinc; stainless versions cover 304 A2-70 and 316 A4-80, and commercially pure titanium Grades 1–4 serves weight-critical or corrosive assemblies. Nylon-patch self-locking variants are available for vibration service.

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Socket Head Cap Screw — 12.9 Grade 4#-40 6#-32 8#-32 10#-24 1/4-20 3/8-16 5/16-18 1/2-13 7/8-9 Black Alloy Steel Hexagonal Hex Socket Cap Screw Bolt UNC
#4-40#6-32#8-32#10-241/4-203/8-165/16-181/2-137/8-9

12.9 Grade Black Alloy Steel Hexagonal Hex Socket Cap Screw Bolt UNC

$0.00
12.9 Grade Black Alloy Steel Hexagonal Hex Socket Cap Screw Bolt UNC Material: Alloy Steel Grade / Class: Grade 12.9 Thread Series: UNC Finish / Coating: Black Oxide
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Socket Head Cap Screw — ASTM A193 B7 Grade Socket Head Cap Screw 12.9 Black Oxide Alloy Steel Industrial Fastener Bolt UNC Unf
#0#2#3#4#5#6#8#101/4-20

ASTM A193 B7 Grade Socket Head Cap Screw 12.9 Black Oxide Alloy Steel Industrial Fastener Bolt UNC Unf

$0.00
ASTM A193 B7 Grade Socket Head Cap Screw 12.9 Black Oxide Alloy Steel Industrial Fastener Bolt UNC Unf Material: Alloy Steel Grade / Class: Grade 12.9 Standards: ASTM A193 Thread...
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Socket Head Cap Screw — 12.9 Grade Alloy Steel Hex Socket Cap Screw UNC 3/8-16 1/2-13 3/4-10 1-1/4-7 Black Oxide Bolt
3/8-161/2-133/4-101-1/4-7

12.9 Grade Alloy Steel Hex Socket Cap Screw UNC Black Oxide Bolt

$0.00
12.9 Grade Alloy Steel Hex Socket Cap Screw UNC Black Oxide Bolt Material: Alloy Steel Grade / Class: Grade 12.9 Thread Series: UNC Finish / Coating: Black Oxide
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Socket Head Cap Screw — Full Thread Hex Socket Cap Screw 316 Stainless UNF 1/4-28 5/16-24 3/8-24 A4-80 ASME
1/4-285/16-243/8-24

Full Thread Hex Socket Cap Screw 316 Stainless UNF A4-80 ASME

$0.00
Full Thread Hex Socket Cap Screw 316 Stainless UNF A4-80 ASME Material: 316 Stainless Steel Grade / Class: A4-80 Standards: ASME Thread Series: UNF Finish / Coating: Plain Features: Full...
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Socket Head Cap Screw — Marine Grade Socket Head Cap Screw 316 Stainless UNC 3/8-16 1/2-13 5/8-11 A4-80 ASME
3/8-161/2-135/8-11

Marine Grade Socket Head Cap Screw 316 Stainless UNC A4-80 ASME

$0.00
Marine Grade Socket Head Cap Screw 316 Stainless UNC A4-80 ASME Material: 316 Stainless Steel Grade / Class: A4-80 Standards: ASME Thread Series: UNC Finish / Coating: Plain
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Socket Head Cap Screw — Alloy Steel 35CrMo Socket Head Cap Screw Grade 12.9 Black Oxide ASME B18.3 High Strength 4#-40 6#-32 8#-32 10#-24 1/4-20 3/8-16
#4-40#6-32#8-32#10-241/4-203/8-16

Alloy Steel 35CrMo Socket Head Cap Screw Grade 12.9 Black Oxide ASME B18.3 High Strength

$0.00
Alloy Steel 35CrMo Socket Head Cap Screw Grade 12.9 Black Oxide ASME B18.3 High Strength Material: 35CrMo Alloy Steel Grade / Class: Grade 12.9 Standards: ASME B18.3 Thread Series: UNC...
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Socket Head Cap Screw — Corrosion Resistant Socket Head Cap Screw 316 Stainless UNC 1/2-13 5/8-11 A4-80 ASME
1/2-135/8-11

Corrosion Resistant Socket Head Cap Screw 316 Stainless UNC A4-80 ASME

$0.00
Corrosion Resistant Socket Head Cap Screw 316 Stainless UNC A4-80 ASME Material: 316 Stainless Steel Grade / Class: A4-80 Standards: ASME Thread Series: UNC Finish / Coating: Plain
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Socket Head Cap Screw — Hexagon Socket Cap Head Screw 316 Stainless UNF 1/4-28 5/16-24 3/8-24 A4-80 ASME
1/4-285/16-243/8-24

Hexagon Socket Cap Head Screw 316 Stainless UNF A4-80 ASME

$0.00
Hexagon Socket Cap Head Screw 316 Stainless UNF A4-80 ASME Material: 316 Stainless Steel Grade / Class: A4-80 Standards: ASME Thread Series: UNF Finish / Coating: Plain
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Socket Head Cap Screw — 16 Stainless Socket Head Cap Screw UNF 1/2-20 5/8-18 3/4-16 A4-80 High Strength ASME
1/2-205/8-183/4-16

16 Stainless Socket Head Cap Screw UNF A4-80 High Strength ASME

$0.00
16 Stainless Socket Head Cap Screw UNF A4-80 High Strength ASME Material: 316 Stainless Steel Grade / Class: A4-80 Standards: ASME Thread Series: UNF Finish / Coating: Plain
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Socket Head Cap Screw — 40CrMo Alloy Steel Socket Head Cap Screw Grade 12.9 UNC 3/8-16 1/2-13 7/8-9 1-8 Black Oxide
3/8-161/2-137/8-91-8

40CrMo Alloy Steel Socket Head Cap Screw Grade 12.9 UNC Black Oxide

$0.00
40CrMo Alloy Steel Socket Head Cap Screw Grade 12.9 UNC Black Oxide Material: 40CrMo Alloy Steel Grade / Class: Grade 12.9 Thread Series: UNC Finish / Coating: Black Oxide
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Socket Head Cap Screw — 316 Stainless Steel UNC Hexagon Socket Head Cap Screw with Nylon Patch ASME B18.3 High Strength 1/4 3/8 9/16 7/8 3/4 1-8 1-1/2
1-8

316 Stainless Steel UNC Hexagon Socket Head Cap Screw with Nylon Patch ASME B18.3 High Strength

$0.00
316 Stainless Steel UNC Hexagon Socket Head Cap Screw with Nylon Patch ASME B18.3 High Strength Material: 316 Stainless Steel Standards: ASME B18.3 Thread Series: UNC Finish / Coating: Plain...
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Socket Head Cap Screw — Allen Bolt Socket Head Cap Screw 304 Stainless UNC 1/4-20 5/16-18 3/8-16 A2-70 ASME
1/4-205/16-183/8-16

Allen Bolt Socket Head Cap Screw 304 Stainless UNC A2-70 ASME

$0.00
Allen Bolt Socket Head Cap Screw 304 Stainless UNC A2-70 ASME Material: 304 Stainless Steel Grade / Class: A2-70 Standards: ASME Thread Series: UNC Finish / Coating: Plain
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Socket Head Cap Screw — Heavy Duty Hex Socket Cap Screw 304 Stainless UNF 1/4-28 3/8-24 1/2-20 A2-70 ASME
1/4-283/8-241/2-20

Heavy Duty Hex Socket Cap Screw 304 Stainless UNF A2-70 ASME

$0.00
Heavy Duty Hex Socket Cap Screw 304 Stainless UNF A2-70 ASME Material: 304 Stainless Steel Grade / Class: A2-70 Standards: ASME Thread Series: UNF Finish / Coating: Plain
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Socket Head Cap Screw — Industrial Allen Bolt Socket Cap Screw 304 Stainless UNC 1/4-20 3/8-16 A2-70 ASME
1/4-203/8-16

Industrial Allen Bolt Socket Cap Screw 304 Stainless UNC A2-70 ASME

$0.00
Industrial Allen Bolt Socket Cap Screw 304 Stainless UNC A2-70 ASME Material: 304 Stainless Steel Grade / Class: A2-70 Standards: ASME Thread Series: UNC Finish / Coating: Plain
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Socket Head Cap Screw — 304 Stainless Socket Head Cap Screw ASSORTED SIZES UNC 1/4 to 1 Inch A2-70 ASME
Assorted Sizes

304 Stainless Socket Head Cap Screw ASSORTED SIZES UNC A2-70 ASME

$0.00
304 Stainless Socket Head Cap Screw ASSORTED SIZES UNC A2-70 ASME Material: 304 Stainless Steel Grade / Class: A2-70 Standards: ASME Thread Series: UNC Finish / Coating: Plain Features: Assorted...
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Socket Head Cap Screw — Precision Hex Socket Head Cap Screw 316 SS UNF 5/16-24 3/8-24 1/2-20 A4-80 ASME
5/16-243/8-241/2-20

Precision Hex Socket Head Cap Screw 316 SS UNF A4-80 ASME

$0.00
Precision Hex Socket Head Cap Screw 316 SS UNF A4-80 ASME Material: 316 Stainless Steel Grade / Class: A4-80 Standards: ASME Thread Series: UNF Finish / Coating: Plain
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Socket Head Cap Screw — Hex Socket Cap Head Bolt 316 Stainless Steel UNF 1/2-20 5/8-18 A4-80 Plain Finish
1/2-205/8-18

Hex Socket Cap Head Bolt 316 Stainless Steel UNF A4-80 Plain Finish

$0.00
Hex Socket Cap Head Bolt 316 Stainless Steel UNF A4-80 Plain Finish Material: 316 Stainless Steel Grade / Class: A4-80 Thread Series: UNF Finish / Coating: Plain
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Socket Head Cap Screw — A4-80 316 Stainless Steel Hex Socket Cap Screw UNC 3/8-16 1/2-13 5/8-11 ASME B18.3
3/8-161/2-135/8-11

A4-80 316 Stainless Steel Hex Socket Cap Screw UNC ASME B18.3

$0.00
A4-80 316 Stainless Steel Hex Socket Cap Screw UNC ASME B18.3 Material: 316 Stainless Steel Grade / Class: A4-80 Standards: ASME B18.3 Thread Series: UNC Finish / Coating: Plain
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Socket Head Cap Screw — 316 Stainless Steel Hex Socket Cap Screw UNC 5/16-18 3/8-16 1/2-13 A4-80 ASME B18.3
5/16-183/8-161/2-13

316 Stainless Steel Hex Socket Cap Screw UNC A4-80 ASME B18.3

$0.00
316 Stainless Steel Hex Socket Cap Screw UNC A4-80 ASME B18.3 Material: 316 Stainless Steel Grade / Class: A4-80 Standards: ASME B18.3 Thread Series: UNC Finish / Coating: Plain
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Socket Head Cap Screw — 316 Stainless Steel UNF Hex Socket Cap Screw Nylok Patch ASME B18.3 A4-80 Vibration Resistant 1-8 1-1/4-7 1-1/2-6 1/2-13 5/8
1-81-1/4-71-1/2-61/2-13

316 Stainless Steel UNF Hex Socket Cap Screw Nylok Patch ASME B18.3 A4-80 Vibration Resistant

$0.00
316 Stainless Steel UNF Hex Socket Cap Screw Nylok Patch ASME B18.3 A4-80 Vibration Resistant Material: 316 Stainless Steel Grade / Class: A4-80 Standards: ASME B18.3 Thread Series: UNC Finish...
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Socket Head Cap Screw — 316 Stainless Steel UNF Hex Socket Cap Screw Nylok Patch ASME B18.3 A4-80 Vibration Resistant
#5#6#8#101/21/41-1/21-1/41/4-20

316 Stainless Steel UNF Hex Socket Cap Screw Nylok Patch ASME B18.3 A4-80 Vibration Resistant

$0.00
316 Stainless Steel UNF Hex Socket Cap Screw Nylok Patch ASME B18.3 A4-80 Vibration Resistant Material: 316 Stainless Steel Grade / Class: A4-80 Standards: ASME B18.3 Thread Series: UNF Finish...
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Socket Head Cap Screw — ANSI/ASME B18.3SH UNC 4#6 #8 #10 1/4-20 5/16-18 3/8-16 1/2-13 5/8-11 7/8-9 1-8 304 Stainless Steel Allen Socket Head Cap Screw
#8#101/4-205/16-183/8-161/2-135/8-117/8-91-8

304 Stainless Steel Socket Head Cap Screw UNC ASME B18.3

$0.00
304 Stainless Steel Socket Head Cap Screw UNC ASME B18.3 Material: 304 Stainless Steel Standards: ASME B18.3 Thread Series: UNC Finish / Coating: Plain
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Socket Head Cap Screw — UNC Hexagon Socket Cap Screw 316 Stainless Steel 1/2-13 5/8-11 3/4-10 A4-80 ASME B18.3
1/2-135/8-113/4-10

UNC Hexagon Socket Cap Screw 316 Stainless Steel A4-80 ASME B18.3

$0.00
UNC Hexagon Socket Cap Screw 316 Stainless Steel A4-80 ASME B18.3 Material: 316 Stainless Steel Grade / Class: A4-80 Standards: ASME B18.3 Thread Series: UNC Finish / Coating: Plain
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Socket Head Cap Screw — A4-80 316 Stainless Steel Socket Cap Screw UNF 10-32 1/4-28 5/16-24 3/8-24 ASME
#10-321/4-285/16-243/8-24

A4-80 316 Stainless Steel Socket Cap Screw UNF ASME

$0.00
A4-80 316 Stainless Steel Socket Cap Screw UNF ASME Material: 316 Stainless Steel Grade / Class: A4-80 Standards: ASME Thread Series: UNF Finish / Coating: Plain
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Buying Guide

Common Questions

What information do you need to quote this series?

Share the standard, thread size, length, material, grade, finish and quantity. For non-standard parts, a drawing or sample helps us confirm production details faster.

Can you make sizes or materials not listed here?

Yes. We manufacture to drawing and to sample. Send your specification through the RFQ form and we will confirm feasibility, MOQ and lead time.

What inspection and material documents can you provide?

Material test certificates, dimensional inspection reports and coating reports are available on request, depending on the material and finish of your order.

What is the MOQ, and can I get samples first?

MOQ depends on size, material and finish — standard catalog sizes start lower, and custom parts are quoted per drawing. Samples are available for most standard items; mention sampling when you send the RFQ and we will confirm.

How long does production and delivery take?

Lead time is confirmed per order with your quotation. Coated and custom parts need additional production and surface-treatment time. Share your target delivery date in the RFQ and we will confirm whether we can meet it before you commit.

Can't find the exact spec?

We manufacture standard and custom fasteners to order. Tell us the size, material, grade, finish and quantity — or send your drawing — and we will confirm MOQ and lead time.

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