S-91660A170 1/2"-13 x 7 5/8" T-Bolts

T-Bolts

0857FA00019 T-Bolts
0857FA00019 T-Bolts

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

Part No.
Part No. 0857FA00019
Equivalent to mcmaster :
91660A170

Basic Information

System of Measurement Inch
T-Bolt Type Collar

Head Parameters

Fastener Head Type Tee
Head Thickness 5/8"
Head Width 3 1/2"

Neck & Shank Parameters

Collar Length 1/2"

Dimension Parameters

Length 7 5/8"
Screw Diameter 0.5"

Thread Parameters

Thread Type UNC
Thread Size 1/2"-13
Threading Partially Threaded
Thread Direction Right Hand
Thread Spacing Coarse
Thread Fit Unified Standard Class 2A
Thread Length 3/4"

Material & Strength Parameters

Material Steel
Hardness Rockwell C45
Tensile Strength 70000 psi

Finish & Compliance Parameters

Finish Black Oxide
REACH Compliant
RoHS Compliant
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Exceptional Tensile Strength – With 70,000 psi tensile strength, this T-bolt provides reliable, high-load clamping for demanding industrial applications.
  • Superior Corrosion Resistance – The black oxide finish offers enhanced protection against rust and wear, extending service life in harsh environments.
  • Precision Thread FitUnified Standard Class 2A coarse threads ensure easy assembly and secure fastening with consistent performance.
  • Optimized Head Design – The 3 1/2" wide tee head and collar type distribute clamping force evenly, reducing the risk of component damage.
  • High Material HardnessRockwell C45 hardness provides excellent resistance to deformation under heavy mechanical stress.
  • Regulatory Compliance – Meets REACH and RoHS 3 standards, ensuring safety and environmental responsibility in global supply chains.
  • Versatile Partial Threading – The partially threaded design with 3/4" thread length allows for adjustable grip and secure placement in T-slots or fixtures.

Professional Applications & Engineering Value

This 1/2"-13 UNC Steel T-Bolt is engineered to address critical challenges in heavy-duty clamping and fixturing systems. The combination of high-strength steel and black oxide finish ensures long-term durability, resisting corrosion in industrial settings like machinery beds, workholding devices, and structural frames. The coarse UNC thread and Class 2A fit facilitate quick installation and maintain clamping integrity under vibration, reducing maintenance downtime. Its tee head with collar design prevents rotation in T-slots, providing stable, repeatable positioning for precision manufacturing and assembly operations. Ideal for use in CNC machining, automotive jigs, and material handling equipment, this T-bolt delivers consistent performance where reliability and compliance with REACH and RoHS 3 are paramount.

Specification Summary & Compliance

This T-bolt adheres to Unified Standard Class 2A thread fit and UNC coarse thread specifications, ensuring dimensional accuracy and interchangeability. It complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, confirming the absence of restricted hazardous substances. Manufactured to meet precise thread size (1/2"-13), length (7 5/8"), and hardness (Rockwell C45) requirements, it supports consistent performance in industrial fastening applications.

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