Federal Specification Socket Head Screws | McMaster-Carr

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System of Measurement

Thread Size

Length

Material

18-8 Stainless Steel

A286 Stainless Steel

Specifications Met

Federal Specification

Fed. Spec. FF-S-86

Fed. Spec. QQ-P-35

Fastener Head Type

Socket Head Profile

Drive Style

Threading

Partially Threaded

DFARS Specialty Metals

Military Specification

Tensile Strength

60,000 psi to 99,999 psi

100,000 psi or greater

Head Diameter

Certificate Type

Material Certificate with Traceable Lot Number

Thread Fit

Unified Standard Class 3A

Thread Type

Drive Size

Head Height

Thread Direction

Tip Type

REACH

Export Control Classification Number (ECCN)

RoHS

Performance

Corrosion Resistant

Hardness

Thread Spacing

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259 Products

Fastening and Joining

Socket Head Screws

Socket Head Screws

With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold

Flat Head Screws

Flat Head Screws

Fit in countersunk holes for a flush finish that won't snag on surrounding parts

Set Screws

Exert pressure at the tip to hold parts in place, unlike screws that hold material together with threads

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)