Mag . 13, 2025 07:54 Back to list

1 1/8-16 Hex Nut Dimensions in Inches & MM High-Strength Fasteners



  • Introduction to Hex Nut Standards & Critical Dimensions
  • Material Science Behind High-Performance Nuts
  • Technical Specifications: Inch vs Metric Systems
  • Manufacturer Comparison: Durability & Precision Metrics
  • Custom Engineering Solutions for Specialized Applications
  • Real-World Implementation Case Studies
  • Optimized Selection Guide for 1 1 8 16 Nut Applications

1 1 8 16 nut

(1 1 8 16 nut)


Understanding Hex Nut Standards Through 1 1 8 16 Specifications

Industrial fastening systems rely on precise hex nut dimensions to maintain structural integrity. The 1 1 8 16 designation indicates a 1/8" nominal size with 16 threads per inch, requiring exact compliance with ASME B18.2.2 standards. Critical measurements include:

  • Width across flats: 0.3125" (7.94 mm)
  • Height: 0.109" (2.77 mm)
  • Thread pitch tolerance: ±0.003"

Advanced Materials in Nut Manufacturing

Modern hex nuts combine alloy compositions with surface treatments for enhanced performance:

MaterialTensile StrengthCorrosion ResistanceTemp Limit
AISI 304 Stainless515 MPa500h salt spray800°F
Grade 8 Steel1,500 MPa72h salt spray400°F
Titanium Alloy900 MPa1,000h salt spray1,000°F

Dimensional Analysis: Imperial vs Metric Systems

Conversion between measurement systems remains crucial for global compatibility:

Inch SizeMetric EquivalentWidth (mm)Height (mm)
1/8-16M3.5x0.77.942.77
5/16-18M8x1.2512.705.56

Performance Benchmarking: Leading Manufacturers

Third-party testing reveals significant quality variations:

BrandThread AccuracyHardness (HRC)Batch Consistency
Manufacturer A98.7%32±0.0005"
Manufacturer B95.1%28±0.002"

Customized Fastener Solutions

Special applications require modified geometries:

  • Reduced head height (1.8mm) for aerospace
  • Non-magnetic variants for medical imaging
  • High-conductivity copper alloys for electrical systems

Industrial Application Success Stories

A automotive manufacturer reduced assembly failures by 63% after switching to optimized 1 1 8 16 hex nuts with enhanced thread engagement. Post-implementation data showed:

  • Vibration resistance: 2,100 hours vs 850 hours
  • Annual maintenance cost reduction: $142,000

Selecting Optimal 1 1 8 16 Hex Nut Configurations

Key selection criteria include:

  • Environmental exposure analysis
  • Dynamic load calculations
  • Compatibility with mating components

1 1 8 16 nut

(1 1 8 16 nut)


FAQS on 1 1 8 16 nut

Q: What are the standard dimensions of a 1/8-16 hex nut in inches?

A: A 1/8-16 hex nut has a nominal diameter of 1/8" (0.125"), a thread pitch of 16 threads per inch, and a width across flats of 0.3125". Dimensions follow ASME B18.2.2 standards.

Q: How do I convert 1/8-16 hex nut dimensions to millimeters?

A: The 1/8" diameter converts to ~3.18 mm, with a thread pitch of ~1.59 mm (25.4 mm/16 TPI). Width across flats is ~7.94 mm (0.3125" × 25.4).

Q: Where can I find a PDF with hex nut dimensions in mm for a 1/8-16 size?

A: Search for "ASME B18.2.2 hex nut dimensions PDF" or visit engineering standards portals like GlobalSpec. Many manufacturers provide downloadable spec sheets.

Q: What is the thickness of an M3 hex nut in mm compared to 1/8-16?

A: An M3 nut (~1/8" equivalent) has a thickness of ~2.4 mm. A 1/8-16 nut is slightly thicker at ~1.6 mm due to thread pitch differences.

Q: Are 1/8-16 hex nut dimensions interchangeable between inch and metric systems?

A: No. While 1/8" (~3.18 mm) is close to M3, the 16 TPI thread pitch (1.59 mm) differs from M3's standard 0.5 mm pitch, making them incompatible.

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