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Fastenio — Precision Fastening Solutions
5/16-18 x 1-3/8" Flat Head Socket Cap Screws Fully Threaded Stainless Steel 18-8 Chrome Plated

5/16-18 x 1-3/8" Flat Head Socket Cap Screws Fully Threaded Stainless Steel 18-8 Chrome Plated

SKU: FN-SS-FHS-51618-1.375-SS18-CS-FT-HEX-CP

Bulk-Only Item

Minimum order quantity: 50 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 →

$12.68/ 50 pcs

$0.25/ea

pack

1 pack × 50 = 50 pieces

In Stock
FN-SS-FHS-51618-1.375-SS18-CS-FT-HEX-CP
Free US shipping 30-day returns Ships ~7 business days

5/16-18 18-8 stainless steel flat head socket cap screws (Allen head), 82° countersunk, fully threaded, ASME B18.3. Corrosion-resistant 18-8 (A2-70) stainless with a flush 82° flat countersunk head and 3/16" hex socket drive. Length measured overall (head included) per countersunk convention. Ideal for OEM, machinery, and MRO applications. Chrome plating gives a bright, decorative finish over the stainless. Sold in production-volume bulk packs.

Material

Stainless Steel

Finish

Chrome Plated

Grade

18-8 (A2-70)

Size

5/16-18

Drive Type

Hex Socket

Head Style

Flat / Countersunk

Standard

ASME B18.3

Guides: What does 1/4-20 mean? · 18-8 stainless steel vs. other grades

Technical Specifications

Thread Size5/16-18
Drive3/16" Hex Socket
Head StyleFlat Countersunk (82°)
Thread CoverageFully Threaded
Head Diameter0.656 in
Head Height0.198 in
Countersink Angle82 °
Thread5/16-18 Coarse
FinishChrome Plated
Length1-3/8