Fasteners > Screws > Socket Countersunk Screws | Flat Head Socket Screw | Flat Head/ Countersunk Socket Screws (UNC/UNF) are manufactured to ANSI B18.3 / ASTM F835 | Made of high-grade alloy steel | Available in plain and Zinc finish. |
Fasteners > Screws > Socket Countersunk Screws | Flat Head Socket Screw | Flat Head/ Countersunk Socket Screws (UNC/UNF) are manufactured to ANSI B18.3 / ASTM F835 | Made of high-grade alloy steel | Available in plain and Zinc finish. |
Fasteners > Screws > Socket Countersunk Screws | Flat Head Socket Screw | Flat Head/ Countersunk Socket Screws (UNC/UNF) are manufactured to ANSI B18.3 / ASTM F835 | Made of high-grade alloy steel | Available in plain and Zinc finish. |
Fasteners > Screws > Socket Countersunk Screws | Flat Head Socket Screw | Flat Head/ Countersunk Socket Screws (UNC/UNF) are manufactured to ANSI B18.3 / ASTM F835 | Made of high-grade alloy steel | Available in plain and Zinc finish. |
Last updated at 05/08/2026 23:41:52
1/4" x 20 TPI x 1/2" Full Thread UNC Coarse Countersunk Head Socket Screw Grade 10.9 (5/32" Key) Plain Black Uncoated ANSI B 18.3
Free delivery between Tue – Thu
Hobsons - 1/4 x 1/2 Plain Ansi B18.3 / Astm F835 Unc Socket Screw Countersunk H | Knc14/12 (Pack Of 100)
Delivery between 9–18 May $7.95
originally posted on ebay.com
Screws look great when fitted and hold tight. Little effort was needed to install and when the nuts and washers were fitted finished off the job nicely.
| Fastener Size | 1/4" |
| Fastener Length | 1/2" |
| System of Measurement | UNC |
| Finish | Black |
| Drive Type | Socket (Allen Key) |
1/4" x 20 TPI x 1/2" Full Thread UNC Coarse Countersunk Head Socket Screw Grade 10.9 (5/32" Key) Plain Black Uncoated ANSI B 18.3
Free delivery between Tue – Thu
Hobsons - 1/4 x 1/2 Plain Ansi B18.3 / Astm F835 Unc Socket Screw Countersunk H | Knc14/12 (Pack Of 100)
Delivery between 9–18 May $7.95
Screws look great when fitted and hold tight. Little effort was needed to install and when the nuts and washers were fitted finished off the job nicely.
| Fastener Size | 1/4" |
| Fastener Length | 1/2" |
| System of Measurement | UNC |
| Finish | Black |
| Drive Type | Socket (Allen Key) |
