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

The 1-8 x 1 1/4 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 retrofit repairs, service records, and exact-size replacement needs. Use it through a clearance hole with a nut or into a prepared tapped hole when the drawing calls for a stainless hex-head fastener.

18-8 stainless steel is an 18% chromium and 8% nickel austenitic stainless material used for ordinary atmosphere, moisture exposure, washdown, and clean appearance. For production, repair, and distributor sourcing, Cold Headers can help confirm the exact diameter and length before quoting.

Technical Highlights

Material: 18-8 Stainless Steel
Thread Size: 1-8
Length: 1 1/4 in.
Head Style: Hex
Drive: External Hex (wrench or socket driven)
Width Across Flats: 1.812-1.875 in.
Head Height: 0.749-0.813 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 1/4 in
Maximum Width Across the Flats	N/A 1.875 in
Minimum Width Across the Flats	N/A 1.812 in
Maximum Width Across Corners	N/A 2.165 in
Minimum Width Across Corners	N/A 2.066 in
Maximum Head Height	N/A 0.813 in
Minimum Head Height	N/A 0.749 in
Material	N/A 18-8 Stainless Steel
Package Type	N/A Each
Search	N/A SSHHCMS.1-8.1 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