5/16-18 316 / A4 Marine-Grade Stainless Steel Button Head Socket Cap Screws — Fully Threaded
SKU: FN-SS-BC-51618-316-FT· 9 lengths
Bulk-Only Item
Minimum order quantity: 250 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 →
$0.28/ea
1 pack × 250 = 250 pieces
5/16-18 (inch) 316 / A4 marine-grade stainless steel button head socket 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. 3/16" hex socket drive with a low-profile domed head. Fully Threaded across all lengths in this listing (1/2" to 3"). 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
button
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.
| Head Dia. | Head Ht. | Threading | Drive | Packs | |||||
|---|---|---|---|---|---|---|---|---|---|
| 316 Stainless Steel | |||||||||
| 5/16-18316 / A4 Marine-Grade Stainless Steel Button Head Socket Cap Screws — Fully Threaded | |||||||||
| 1/2" | 0.547 in | 0.166 in | Fully threaded | Hex Socket | 250 | FN-SS-BC-51618-0.5-SS316-CS-FT-HEX-PL | $43.28$0.17/eapack of 250 · $0.17 ea | ||
| 3/4" | 0.547 in | 0.166 in | Fully threaded | Hex Socket | 250 | FN-SS-BC-51618-0.75-SS316-CS-FT-HEX-PL | $70.88$0.28/eapack of 250 · $0.28 ea | ||
| 1" | 0.547 in | 0.166 in | Fully threaded | Hex Socket | 100 | FN-SS-BC-51618-1-SS316-CS-FT-HEX-PL | $29.17$0.29/eapack of 100 · $0.29 ea | ||
| 1-1/4" | 0.547 in | 0.166 in | Fully threaded | Hex Socket | 100 | FN-SS-BC-51618-1.25-SS316-CS-FT-HEX-PL | $42.23$0.42/eapack of 100 · $0.42 ea | ||
| 1-1/2" | 0.547 in | 0.166 in | Fully threaded | Hex Socket | 100 | FN-SS-BC-51618-1.5-SS316-CS-FT-HEX-PL | $43.84$0.44/eapack of 100 · $0.44 ea | ||
| 1-3/4" | 0.547 in | 0.166 in | Fully threaded | Hex Socket | 50 | FN-SS-BC-51618-1.75-SS316-CS-FT-HEX-PL | $27.80$0.56/eapack of 50 · $0.56 ea | ||
| 2" | 0.547 in | 0.166 in | Fully threaded | Hex Socket | 50 | FN-SS-BC-51618-2-SS316-CS-FT-HEX-PL | $31.51$0.63/eapack of 50 · $0.63 ea | ||
| 2-1/2" | 0.547 in | 0.166 in | Fully threaded | Hex Socket | 50 | FN-SS-BC-51618-2.5-SS316-CS-FT-HEX-PL | $37.09$0.74/eapack of 50 · $0.74 ea | ||
| 3" | 0.547 in | 0.166 in | Fully threaded | Hex Socket | 50 | FN-SS-BC-51618-3-SS316-CS-FT-HEX-PL | $39.76$0.80/eapack of 50 · $0.80 ea | ||
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These items count toward the $500 bulk minimum. Mix-and-match to reach it.
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