Security Machine Screws | McMaster-Carr

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Drive Style

Drilled Spanner

External Pentagon

Tamper-Resistant Hex

Tamper-Resistant Torx

Tamper-Resistant Torx Plus

Locking Type

System of Measurement

Thread Size

Length

Fastener Head Type

Material

18-8 Stainless Steel

Drive Size

Flat Head Profile

Head Diameter

Rounded Head Style

Finish

Threading

Partially Threaded

Head Height

Thread Type

Thread Spacing

Countersink Angle

Specifications Met

Fed. Spec. QQ-P-35

Thread Direction

Tensile Strength

60,000 psi to 99,999 psi

100,000 psi or greater

Thread Fit

Metric Class 6g

Unified Standard Class 2A

Unified Standard Class 3A

Tip Type

DFARS Specialty Metals

Export Control Classification Number (ECCN)

RoHS

REACH

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1,138 Products

Fastening and Joining

Rounded Head Screws

Rounded Head Screws

Sit just above the surface for a low-profile finish and hold tighter than flat head screws

Flat Head Screws

Flat Head Screws

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

Pentagon Head Screws

Pentagon Head Screws

Create a tamper-resistant joint with a head than can only be removed with a 5-point socket

Socket Head Screws

Socket Head Screws

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

Hex Head Screws

Hex Head Screws

Used with nuts to create a stronger joint than flat and rounded screws

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