1-8 x 3/8 18-8 Stainless Hex Head Cap Screw

The 1-8 x 3/8 size in 18-8 stainless is suited to hex-head fastening where frames, brackets, or guards need serviceable external drive access. 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 outdoor hardware, equipment covers, and access panels. Stainless-on-stainless threads can gall when run down fast or dry; moderate installation speed and thread lubricant are prudent on larger diameters.

18-8 stainless steel is an 18% chromium and 8% nickel austenitic stainless material used for ordinary atmosphere, moisture exposure, washdown, and clean appearance. Cold Headers has supplied specialty fasteners since 1962 and supports exact-size sourcing for hard-to-find industrial hardware.

Technical Highlights

Material: 18-8 Stainless Steel
Thread Size: 1-8
Length: 3/8 in.
Head Style: Hex
Drive: External Hex (wrench or socket driven)
Width Across Flats: 0.551-0.562 in.
Wrench Size: 9/16 in.
Head Height: 0.226-0.243 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 3/8 in
Maximum Width Across the Flats	N/A 0.562 in
Minimum Width Across the Flats	N/A 0.551 in
Maximum Width Across Corners	N/A 0.650 in
Minimum Width Across Corners	N/A 0.628 in
Maximum Head Height	N/A 0.243 in
Minimum Head Height	N/A 0.226 in
Material	N/A 18-8 Stainless Steel
Package Type	N/A Each
Search	N/A SSHHCMS.1-8.3/8

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