#4-40 Cup Point Socket Set Screws Stainless Steel 18-8
SKU: FN-SS-SSS-440-CUP· 9 lengths
Bulk-Only Item
Minimum order quantity: 2,500 pieces per pack. Ships 7 business days after your cart reaches the $500 bulk minimum — bulk-only and regularly-stocked items both count. Learn more →
$0.06/ea
1 pack × 2,500 = 2,500 pieces
#4-40 18-8 stainless steel cup point socket set screws — headless grub screws with an Allen hex socket drive and a cup point, per ASME B18.3. Corrosion-resistant 18-8 (A2-70) stainless, fully threaded, 0.050" hex socket. 9 lengths (1/8"-1"). Used to lock a component onto a shaft or in a tapped hole; the cup point bites into soft or hard surfaces for a semi-permanent hold. Ideal for OEM, machinery, and MRO applications.
Material
Stainless Steel
Finish
Plain / Natural
Grade
18-8 (A2-70)
Size
#4-40
Drive Type
Hex Socket
Head Style
set screw
Standard
ASME B18.3
Guides: What does 1/4-20 mean? · 18-8 stainless steel vs. other grades
Technical Specifications
Order any length — 9 in this family
Type the packs you need and press Add; sort any column.
| Drive | Drive Size | Point | Packs | |||||
|---|---|---|---|---|---|---|---|---|
| 18-8 Stainless Steel | ||||||||
| #4-40Cup Point Socket Set Screws Stainless Steel 18-8 | ||||||||
| 1/8" | Hex Socket | 0.050 in | Cup Point | 2,500 | FN-SS-SSS-440-0.125-SS18-CS-CUP-HEX-PL | $106.15$0.04/eapack of 2,500 · $0.04 ea | ||
| 3/16" | Hex Socket | 0.050 in | Cup Point | 5,000 | FN-SS-SSS-440-0.1875-SS18-CS-CUP-HEX-PL | $213.40$0.04/eapack of 5,000 · $0.04 ea | ||
| 1/4" | Hex Socket | 0.050 in | Cup Point | 2,500 | FN-SS-SSS-440-0.25-SS18-CS-CUP-HEX-PL | $142.85$0.06/eapack of 2,500 · $0.06 ea | ||
| 5/16" | Hex Socket | 0.050 in | Cup Point | 2,500 | FN-SS-SSS-440-0.3125-SS18-CS-CUP-HEX-PL | $98.45$0.04/eapack of 2,500 · $0.04 ea | ||
| 3/8" | Hex Socket | 0.050 in | Cup Point | 2,500 | FN-SS-SSS-440-0.375-SS18-CS-CUP-HEX-PL | $179.60$0.07/eapack of 2,500 · $0.07 ea | ||
| 1/2" | Hex Socket | 0.050 in | Cup Point | 1,000 | FN-SS-SSS-440-0.5-SS18-CS-CUP-HEX-PL | $57.76$0.06/eapack of 1,000 · $0.06 ea | ||
| 5/8" | Hex Socket | 0.050 in | Cup Point | 1,000 | FN-SS-SSS-440-0.625-SS18-CS-CUP-HEX-PL | $94.55$0.09/eapack of 1,000 · $0.09 ea | ||
| 3/4" | Hex Socket | 0.050 in | Cup Point | 1,000 | FN-SS-SSS-440-0.75-SS18-CS-CUP-HEX-PL | $93.72$0.09/eapack of 1,000 · $0.09 ea | ||
| 1" | Hex Socket | 0.050 in | Cup Point | 1,000 | FN-SS-SSS-440-1-SS18-CS-CUP-HEX-PL | $78.00$0.08/eapack of 1,000 · $0.08 ea | ||
Combine to unlock checkout
These items count toward the $500 bulk minimum. Mix-and-match to reach it.
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