Spectrum Screws for Trijicon RMR / SRO and Holosun 407c / 507c – 4-40 5/16″ and 1/4″

$19.99

Spectrum Screws – Trijicon RMR / SRO and Holosun 407c / 507c – 4-40 5/16″ and 1/4″ Flat Head Torx

Spectrum Screws included:

  • Cover Plate Set – 4-40 5/16″ Torx T8 Screws
  • Optic Mount Set – 4-40 1/4″ Torx T8 Screws

These screw heads are polished and finished in Spectrum!

Compatible with Zaffiri Precision Glock Models:

  • Glock 17
  • Glock 17 Long
  • Glock 19
  • Glock 26
  • Glock 34
  • Glock 45 (Glock 19 Gen 5)
  • Sig P320c (Compact)
  • Sig P320F (Full)

Optic Mount Screws are compatible with Trijicon RMR / SRO and Holosun C series optics.
These screws are not compatible with OEM slides or guaranteed to work with non ZP slides.

Manufacturer’s Information: 

Thread Size 4-40
Length 5/16” and 1/4″
Threading Fully Threaded
Head Diameter 0.212″
Head Height 0.067″
Countersink Angle 82°
Drive Style Torx Plus
Drive Size IP8, T8
Material 18-8 Stainless Steel
Finish Spectrum
Hardness Rockwell B70
Tensile Strength 60,000 psi
Screw Size Decimal Equivalent 0.112″
Thread Type UNC
Thread Spacing Coarse
Thread Fit Class 2A
Thread Direction Right Hand
Head Type Flat
Flat Head Profile Standard
System of Measurement Inch
Specifications Met ASME B18.3
RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (01/17/2023, 233 SVHC) Compliant
DFARS Specialty Metals Compliant (252.225-7009)
Country of Origin United States

Frequently Asked Questions

What is your shipping time?

Most orders ship within 2-3 business days.

Do you accept returns?

Yes, returns are accepted within 30 days as long as the item is unused and in original condition.

How can I contact support?

Contact our support team through the contact page or by replying to your order confirmation email.

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