View All Sizes / Materials
1/2-20 UNF x 2.1/4 inch Socket Countersunk Screws (ANSI B18.3) - Black A2 Stainless Steel
Images shown for graphic representation

1/2-20 UNF x 2.1/4 inch Socket Countersunk Screws (ANSI B18.3) - Black A2 Stainless Steel

SSK-1/2-20-2.1/4-A2-BL

. Order within 07 hours, 14 minutes. Details. Find out when you will get it.
Delivered To Get it by
Australia Wednesday, November 15, 2017
Austria Tuesday, November 14, 2017
Belgium Tuesday, November 14, 2017
Canada Wednesday, November 15, 2017
Czech Republic Tuesday, November 14, 2017
Denmark Tuesday, November 14, 2017
Europe (EU) Tuesday, November 14, 2017
France Tuesday, November 14, 2017
Germany Tuesday, November 14, 2017
Hong Kong Wednesday, November 15, 2017
India Wednesday, November 15, 2017
Indonesia Wednesday, November 15, 2017
Ireland Tuesday, November 14, 2017
Malaysia Wednesday, November 15, 2017
Mexico Wednesday, November 15, 2017
Netherlands Tuesday, November 14, 2017
New Zealand Wednesday, November 15, 2017
Norway Tuesday, November 14, 2017
Philippines Wednesday, November 15, 2017
Rest of World Wednesday, November 15, 2017
Singapore Wednesday, November 15, 2017
South Africa Wednesday, November 15, 2017
Sweden Tuesday, November 14, 2017
Switzerland Tuesday, November 14, 2017
Taiwan Tuesday, November 14, 2017
Turkey Tuesday, November 14, 2017
United Arab Emirates Wednesday, November 15, 2017
United Kingdom Monday, November 13, 2017
United States Tuesday, November 14, 2017
United Kingdom (Saturday) Saturday, November 11, 2017

Available In Other Materials & Finishes


Key Features

  • Metric or Imperial?: Imperial
  • Thread Size (T): 1/2-20
  • Overall Length (L): 2.1/4 inch
  • Hexagon A/F (A): 5/16 inch
  • Material: A2 Stainless Steel - Black
View the full technical specification
Not available online. Talk to our engineers.
Eligible for 30 day returns. Details.
AccuScrews Components Official AccuScrews Product.

1/2-20 UNF x 2.1/4 inch Socket Countersunk Screws (ANSI B18.3) - Black A2 Stainless Steel Technical Specification

1/2-20 UNF x 2.1/4 inch Socket Countersunk Screws (ANSI B18.3) - Black A2 Stainless Steel Drawing
Countersunk Length (H)0.251 inch
FinishChemical Matte Black
General Tolerance+/- 0.13mm
Head Diameter [max] (D)0.938 inch
Hexagon A/F (A)5/16 inch
Hexagon Depth (P)0.172 inch
Manufacturing StandardANSI B18.3
MaterialA2 Stainless Steel - Black
Material SpecificationA2-70 Stainless Steel
Metric or Imperial?Imperial
Overall Length (L)2.1/4 inch
Screw Thread Pitch20 TPI
Thread Size (T)1/2-20

See a problem with this specification? Let us know.


Product Certifications

Signed Certificate of Conformity
Signed Certificate of Conformity
RoHS Compliant
RoHS Compliant
REACH Compliant
REACH Compliant

3D Models

3D models are only available to registered customers.

To view and download models from our 3D library, please log in or sign up.


1/2-20 UNF x 2.1/4 inch Socket Countersunk Screws (ANSI B18.3) - Black A2 Stainless Steel Description

The 1/2-20 UNF x 2.1/4 inch Socket Countersunk Screws (ANSI B18.3) - Black A2 Stainless Steel has the following features:

  • 1/2-20 Thread Size (T)
  • 5/16 inch Hexagon A/F (A)
  • 0.172 inch Hexagon Depth (P)
  • ANSI B18.3 Manufacturing Standard
  • 2.1/4 inch Overall Length (L)
  • A2 Stainless Steel - Black Material
  • A2-70 Stainless Steel Material Specification
  • 20 TPI Screw Thread Pitch
  • Chemical Matte Black Finish
  • +/- 0.13mm General Tolerance
  • Imperial Metric or Imperial?
  • 0.938 inch Head Diameter [max] (D)
  • 0.251 inch Countersunk Length (H)

Other Key Information

Shipping Destinations:Worldwide.
View delivery information.
Weight: 0.06kg.
Product First Available:Sunday, June 28, 2015
Stock Last Updated:08:45 AM
Tuesday, October 17, 2017
Specification Last Updated:Wednesday, October 12, 2016
APC (Accu Product Code):SSK-1/2-20-2.1/4-A2-BL
EAN13 (International Article No.):5054328973251
ASIN (Amazon Stock Identification No.):ASIN not defined.

Top