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. |
in 2 offers
The lowest price for 1/2 x 2 1/2" UNC Flat Head Socket Screw Plain - Box of 25 right now is $14.00 at Bolt & Nut Australia, compared across 2 retailers.
The all-time low was $14.00 on 29 July 2025. That's the lowest price we've ever tracked — a great time to buy.
Prices last updated 21 Mar 2026.
1/2 x 2 1/2" UNC Flat Head Socket Screw Plain - Box of 25
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 21/03/2026 19:32:34
1/2" x 13 TPI x 2-1/2" Part Thread UNC Coarse Countersunk Head Socket Screw Grade 10.9 (5/16" Key) Plain Black Uncoated ANSI B 18.3
Free delivery between Tue – Thu
Hobsons - 1/2 x 2-1/2 Plain Ansi B18.3 / Astm F835 Unc Socket Screw Countersunk H | Knc12/212 (Pack Of 25)
Delivery between 23–31 Mar $7.95
| Fastener Size | 1/2" |
| Fastener Length | 2 1/2" |
| System of Measurement | UNC |
| Finish | Plain |
| Drive Type | Socket (Allen Key) |
1/2" x 13 TPI x 2-1/2" Part Thread UNC Coarse Countersunk Head Socket Screw Grade 10.9 (5/16" Key) Plain Black Uncoated ANSI B 18.3
Free delivery between Tue – Thu
Hobsons - 1/2 x 2-1/2 Plain Ansi B18.3 / Astm F835 Unc Socket Screw Countersunk H | Knc12/212 (Pack Of 25)
Delivery between 23–31 Mar $7.95
| Fastener Size | 1/2" |
| Fastener Length | 2 1/2" |
| System of Measurement | UNC |
| Finish | Plain |
| Drive Type | Socket (Allen Key) |
