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Starrett Lock Bolt Assembly, for 4" Square and Center Heads, Precision Replacement Part - PT99021

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Product details

Management number 221165448 Release Date 2026/05/03 List Price US$10.40 Model Number 221165448
Category

The Starrett Lock Bolt Assembly is a great replacement part designed for use with 4" square & center heads. This durable lock bolt is crafted from premium steel, ensuring robust performance and longevity. The smooth black finish reduces friction, providing a secure and reliable lock for your measurement tools. Compatible with a wide range of Starrett models, this assembly is perfect for replacing lost or damaged bolts, maintaining the accuracy and functionality of your tools.

  • Heavy Duty - Our lock bolts are made to last with quality materials, ensuring durability, heavy use and better work performance.
  • Easy to Use - Designed to be user-friendly for professional or an amateur when it comes to home improvement, our tools are handy and accessible.
  • Seamless - Engineered for flawless integration with the Starrett 6" square head, ensuring optimal performance for variety of tasks.
  • Quality Made - Made from top-tier materials to ensure long-lasting performance and reliability.
  • The Standard for Excellence - Proudly made in the USA, Starrett combines over 140 years of American heritage and innovation with globally sourced materials to deliver exceptional quality tools and products.
UPC 049659121414
Brand Starrett
Color Black
Head Type Square
Size Name 3/8 in
Metal Type Carbon Steel
Unit Count 1.0 Count
Part Number PT99021
Thread Type Unf
Finish Types glossy
Manufacturer Starrett
Thread Class 3B
Thread Style Right Hand
Fastener Size 3.5 inches
Fastener Type Carriage Bolt
Item Hardness Grade 8
Material Type Alloy Steel
Exterior Finish Black Oxide
Item Dimensions 6 x 3.5 x 0.3 inches
Number Of Items 1
Thread Coverage Unthreaded
Screw Head Style Square
Screw Point Style Type A
Manufacturer Grade heavy-duty
Set Screw Thread Type Unified National Fine (UNF)
Compatible Groove Diameter 4 Inches

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