5/16-18 316 Stainless Steel Flat Head Socket Cap Screws — 82° Countersunk — Partially Threaded
SKU: FN-SS-FHS-51618-316-PARTTHD· 6 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 →
$0.44/ea
1 pack × 100 = 100 pieces
5/16-18 316 stainless steel flat head socket cap screws (Allen head), 82° countersunk, partially threaded, ASME B18.3. Superior 316 (A4) marine-grade corrosion resistance vs 18-8. Flush 82° flat countersunk head, 3/16" hex socket drive. 6 lengths (1-1/2"-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 — 6 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 — Partially Threaded | |||||||||
| 1-1/2" | 0.656 in | 0.198 in | Partially threaded | Hex Socket | 100 | FN-SS-FHS-51618-1.5-SS316-CS-PT-HEX-PL | $44.37$0.44/eapack of 100 · $0.44 ea | ||
| 2" | 0.656 in | 0.198 in | Partially threaded | Hex Socket | 50 | FN-SS-FHS-51618-2-SS316-CS-PT-HEX-PL | $23.05$0.46/eapack of 50 · $0.46 ea | ||
| 2-1/2" | 0.656 in | 0.198 in | Partially threaded | Hex Socket | 25 | FN-SS-FHS-51618-2.5-SS316-CS-PT-HEX-PL | $18.79$0.75/eapack of 25 · $0.75 ea | ||
| 3" | 0.656 in | 0.198 in | Partially threaded | Hex Socket | 25 | FN-SS-FHS-51618-3-SS316-CS-PT-HEX-PL | $19.38$0.78/eapack of 25 · $0.78 ea | ||
| 3-1/2" | 0.656 in | 0.198 in | Partially threaded | Hex Socket | 25 | FN-SS-FHS-51618-3.5-SS316-CS-PT-HEX-PL | $27.44$1.10/eapack of 25 · $1.10 ea | ||
| 4" | 0.656 in | 0.198 in | Partially threaded | Hex Socket | 25 | FN-SS-FHS-51618-4-SS316-CS-PT-HEX-PL | $33.56$1.34/eapack of 25 · $1.34 ea | ||
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These items count toward the $500 bulk minimum. Mix-and-match to reach it.
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