5/16-18 316 Stainless Steel Flat Head Socket Cap Screws — 82° Countersunk — Fully Threaded
SKU: FN-SS-FHS-51618-316-FULLTHD· 3 lengths
Bulk-Only Item
Minimum order quantity: 100 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 →
$0.25/ea
1 pack × 100 = 100 pieces
5/16-18 316 stainless steel flat head socket cap screws (Allen head), 82° countersunk, fully threaded, ASME B18.3. Superior 316 (A4) marine-grade corrosion resistance vs 18-8. Flush 82° flat countersunk head, 3/16" hex socket drive. 3 lengths (3/4"-1-1/4"). Length measured overall (head included). Marine, OEM, and MRO applications.
Material
Stainless Steel
Finish
Plain / Natural
Grade
316 (A4-70)
Size
5/16-18
Drive Type
Hex Socket
Head Style
flat
Standard
ASME B18.3
Guides: What does 1/4-20 mean? · 18-8 stainless steel vs. other grades
Technical Specifications
Order any length — 3 in this family
Type the packs you need and press Add; sort any column.
| Head Dia. | Head Ht. | Threading | Drive | Packs | |||||
|---|---|---|---|---|---|---|---|---|---|
| 316 Stainless Steel | |||||||||
| 5/16-18316 Stainless Steel Flat Head Socket Cap Screws — 82° Countersunk — Fully Threaded | |||||||||
| 3/4" | 0.656 in | 0.198 in | Fully threaded | Hex Socket | 100 | FN-SS-FHS-51618-0.75-SS316-CS-FT-HEX-PL | $25.45$0.25/eapack of 100 · $0.25 ea | ||
| 1" | 0.656 in | 0.198 in | Fully threaded | Hex Socket | 100 | FN-SS-FHS-51618-1-SS316-CS-FT-HEX-PL | $36.59$0.37/eapack of 100 · $0.37 ea | ||
| 1-1/4" | 0.656 in | 0.198 in | Fully threaded | Hex Socket | 100 | FN-SS-FHS-51618-1.25-SS316-CS-FT-HEX-PL | $48.00$0.48/eapack of 100 · $0.48 ea | ||
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These items count toward the $500 bulk minimum. Mix-and-match to reach it.
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