1-8 x 1/4 18-8 Stainless Hex Head Cap Screw

1-8 x 1/4 18-8 Stainless Steel Hex Head Cap Screw is built for conventional hex-head fastening through clearance holes or into tapped parts. In this size range it is treated as a hex head cap screw, with the hex head driven by external tooling rather than an internal socket.

Common application reviews include pump bases, flanges, and plant-service hardware. The head can be tightened with standard side-access tooling, which helps where top clearance is limited by covers or nearby components.

18-8 stainless steel is an 18% chromium and 8% nickel austenitic stainless material used for ordinary atmosphere, moisture exposure, washdown, and clean appearance. When standard catalog searches are too broad, Cold Headers supports precise sourcing for stainless fasteners and related socket products.

Technical Highlights

Material: 18-8 Stainless Steel
Thread Size: 1-8
Length: 1/4 in.
Head Style: Hex
Drive: External Hex (wrench or socket driven)
Width Across Flats: 0.428-0.438 in.
Wrench Size: 7/16 in.
Head Height: 0.150-0.163 in.
Dimensional Standard: ASME B18.2.1
Material Standard: ASTM F593

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

Unit of Measure

Specifications | Note

Specifications

Brands	N/A Cold Headers, Inc.
Diameter	N/A 1-8
Length	N/A 1/4 in
Maximum Width Across the Flats	N/A 0.438 in
Minimum Width Across the Flats	N/A 0.428 in
Maximum Width Across Corners	N/A 0.505 in
Minimum Width Across Corners	N/A 0.488 in
Maximum Head Height	N/A 0.163 in
Minimum Head Height	N/A 0.150 in
Material	N/A 18-8 Stainless Steel
Package Type	N/A Each
Search	N/A SSHHCMS.1-8.1/4

Note

N/A Less Than Package Quantity Specified Plus 25%.

Technical Highlights

Specifications

Brands

Diameter

Length

Maximum Width Across the Flats

Minimum Width Across the Flats

Maximum Width Across Corners

Minimum Width Across Corners

Maximum Head Height

Minimum Head Height

Material

Package Type

Search

Note

Note