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

Drive Style

Socket Head Profile

Threading

Partially Threaded

Military Specification

DFARS Specialty Metals

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

Drive Size

Thread Type

Head Height

Thread Direction

REACH

Thread Spacing

Export Control Classification Number (ECCN)

RoHS

Hardness

Countersink Angle

Flat Head Profile

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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.)