Last updated at 05/12/2026 00:50:26
5/16" X 18 Tpi X 3/4" Unc Countersunk Socket Screw G10.9 Plain Black
Free delivery
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5/16" x 18 TPI UNC Coarse Plain Black Uncoated Grade 10.9 Countersunk Head Socket (3/16" Key) Screws ANSI B 18.3
Next-day delivery $5
5/16" x 18 TPI x 3/4" Full Thread UNC Coarse Countersunk Head Socket Screw Grade 10.9 (3/16" Key) Plain Black Uncoated ANSI B 18.3
Next-day delivery $5
5/16 x 3/4" UNC Flat Head Socket Screw Plain - Box of 100
Delivery between 14–21 May $12.61
Hobsons - 5/16 x 3/4 Plain Ansi B18.3 / Astm F835 Unc Socket Screw Countersunk H | Knc516/34 (Pack Of 100)
Delivery between 12–20 May $7.95
| Fastener Size | 5/16" |
| Fastener Length | 3/4" |
| System of Measurement | UNC |
| Finish | Plain |
| Drive Type | Socket (Allen Key) |
5/16" X 18 Tpi X 3/4" Unc Countersunk Socket Screw G10.9 Plain Black
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
5/16" x 18 TPI UNC Coarse Plain Black Uncoated Grade 10.9 Countersunk Head Socket (3/16" Key) Screws ANSI B 18.3
Next-day delivery $5
5/16" x 18 TPI x 3/4" Full Thread UNC Coarse Countersunk Head Socket Screw Grade 10.9 (3/16" Key) Plain Black Uncoated ANSI B 18.3
Next-day delivery $5
5/16 x 3/4" UNC Flat Head Socket Screw Plain - Box of 100
Delivery between 14–21 May $12.61
Hobsons - 5/16 x 3/4 Plain Ansi B18.3 / Astm F835 Unc Socket Screw Countersunk H | Knc516/34 (Pack Of 100)
Delivery between 12–20 May $7.95
| Fastener Size | 5/16" |
| Fastener Length | 3/4" |
| System of Measurement | UNC |
| Finish | Plain |
| Drive Type | Socket (Allen Key) |
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. |
