5/16-18 316 / A4 Marine-Grade Stainless Steel Hex Socket Head Cap Screws — Fully Threaded
SKU: FN-SS-SHCS-51618-316-FULLTHD· 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 →
$0.38/ea
1 pack × 100 = 100 pieces
5/16-18 316 / A4 marine-grade stainless steel hex socket head cap screws (Allen head), fully threaded, ASME B18.3. 316 stainless adds molybdenum for markedly better resistance to salt water, chlorides and pitting than 18-8 / A2 — the right choice for marine, coastal, pool and chemical service. 1/4" hex socket drive with a cylindrical cap head. Fully Threaded across all lengths in this listing (1/2" to 1-1/4"). These lengths are threaded the full length of the shank. Sold in production-volume bulk packs.
Material
Stainless Steel
Finish
Plain / Natural
Grade
316 (A4-70)
Size
5/16-18
Drive Type
Hex Socket
Head Style
socket
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 / A4 Marine-Grade Stainless Steel Hex Socket Head Cap Screws — Fully Threaded | |||||||||
| 1/2" | 0.469 in | 0.3125 in | Fully threaded | Hex Socket | 100 | FN-SS-SHCS-51618-0.5-SS316-CS-FT-HEX-PL | $27.57$0.28/eapack of 100 · $0.28 ea | ||
| 5/8" | 0.469 in | 0.3125 in | Fully threaded | Hex Socket | 100 | FN-SS-SHCS-51618-0.625-SS316-CS-FT-HEX-PL | $29.14$0.29/eapack of 100 · $0.29 ea | ||
| 3/4" | 0.469 in | 0.3125 in | Fully threaded | Hex Socket | 100 | FN-SS-SHCS-51618-0.75-SS316-CS-FT-HEX-PL | $36.64$0.37/eapack of 100 · $0.37 ea | ||
| 7/8" | 0.469 in | 0.3125 in | Fully threaded | Hex Socket | 100 | FN-SS-SHCS-51618-0.875-SS316-CS-FT-HEX-PL | $41.45$0.41/eapack of 100 · $0.41 ea | ||
| 1" | 0.469 in | 0.3125 in | Fully threaded | Hex Socket | 100 | FN-SS-SHCS-51618-1-SS316-CS-FT-HEX-PL | $38.33$0.38/eapack of 100 · $0.38 ea | ||
| 1-1/4" | 0.469 in | 0.3125 in | Fully threaded | Hex Socket | 100 | FN-SS-SHCS-51618-1.25-SS316-CS-FT-HEX-PL | $51.21$0.51/eapack of 100 · $0.51 ea | ||
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These items count toward the $500 bulk minimum. Mix-and-match to reach it.
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