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

This 1-8 x 4 18-8 stainless hex head cap screw is a size-specific listing for assemblies that use a nut or prepared tapped hole. 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 HVAC equipment, conveyor structures, and retrofit repairs. 18-8 stainless may pick up slight magnetism from cold working, which is normal for this austenitic stainless material.

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 helps buyers match uncommon lengths, older drawings, and replacement sizes without changing the protected SKU data.

Technical Highlights

Material: 18-8 Stainless Steel
Thread Size: 1-8
Length: 4 in.
Head Style: Hex
Drive: External Hex (wrench or socket driven)
Width Across Flats: 0.181-0.188 in.
Wrench Size: 3/16 in.
Head Height: 0.049-0.060 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 4 in
Maximum Width Across the Flats	N/A 0.188 in
Minimum Width Across the Flats	N/A 0.181 in
Minimum Width Across Corners	N/A 0.202 in
Maximum Head Height	N/A 0.060 in
Minimum Head Height	N/A 0.049 in
Material	N/A 18-8 Stainless Steel
Package Type	N/A Each
Search	N/A SSHHCMS.1-8.4

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

Minimum Width Across Corners

Maximum Head Height

Minimum Head Height

Material

Package Type

Search

Note

Note