S-95348A114 0.915" ID x 1.76" OD ASME B18.2.6; ASTM F959 Type A490 Tension-Indicating Structural Washers

Tension-Indicating Structural Washers

1257FA00030 Tension-Indicating Structural Washers
1257FA00030 Tension-Indicating Structural Washers

Image may differ from product. See technical specification for details.

Part No.
Part No. 1257FA00030
Equivalent to mcmaster :
95348A114

Basic Information

System of Measurement Inch
Washer Type Tension Indicating
Specifications Met ASME B18.2.6; ASTM F959 Type A490
Features Orange Tension-Indicating Dye

Dimension Parameters

ID 0.915"
OD 1.76"
Thickness 0.142-0.260"

Material & Strength Parameters

Material Zinc-Plated Steel
Hardness Rockwell C37

Installation & Application Parameters

For Screw Size 7/8"

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (06/14/2023, 235 SVHC) Compliant

Special Type Parameters

Tension Indicated 49,000 lbs.
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Visual tension verification through orange dye ensures precise bolt installation and prevents under/over-tightening in critical assemblies.
  • High-load capacity of 49,000 lbs provides reliable performance in heavy-duty structural and industrial applications.
  • Zinc-plated steel construction offers excellent corrosion resistance and durability in harsh operating environments.
  • Rockwell C37 hardness maintains dimensional stability and prevents deformation under extreme pressure.
  • Compliance with ASME B18.2.6 and ASTM F959 Type A490 standards guarantees consistent quality and engineering reliability.
  • RoHS 3 and REACH compliance ensures environmental responsibility and regulatory acceptance in global markets.
  • Optimized dimensions (0.915" ID, 1.76" OD) ensure perfect compatibility with 7/8" fasteners and uniform load distribution.

Professional Applications & Engineering Value

This tension indicating washer addresses critical safety concerns in structural steel connections, heavy machinery assembly, and high-load bolted joints where precise clamping force is paramount. The zinc-plated steel construction combined with Rockwell C37 hardness prevents galling and maintains integrity under vibration and dynamic loads. The orange tension-indicating dye provides immediate visual confirmation of proper installation, eliminating guesswork and reducing the risk of joint failure. Engineered to meet ASME B18.2.6 and ASTM F959 Type A490 specifications, these washers deliver consistent performance in bridge construction, industrial equipment, and other demanding applications where verification of bolt tension is essential for operational safety.

Specification Summary & Compliance

Manufactured to precise dimensional standards with 0.915" inner diameter, 1.76" outer diameter, and thickness ranging from 0.142" to 0.260" for optimal performance with 7/8" fasteners. The washer meets ASME B18.2.6 dimensional requirements and ASTM F959 Type A490 mechanical properties. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and unrestricted use across international markets.

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