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STARRETT Lock Bolt Assembly, Smooth, Steel, 4 in Compatible Blade Lg - Protractor & Machinist Square Parts & Accessories
STARRETTProtractor & Machinist Square Parts & Accessories

STARRETT Lock Bolt Assembly, Smooth, Steel, 4 in Compatible Blade Lg

The STARRETT Lock Bolt Assembly is a steel protractor and machinist square accessory with a smooth finish, designed for use with 4-inch compatible blades. This OEM part (MPN PT99021) is manufactured by STARRETT and…

SKU 3G-OTH-407488

Also listed as: PT 99021 · PT-99021

Brand
STARRETT
Item
Lock Bolt Assembly, Smooth, Steel, 4 in Compatible Blade Lg
Part Number
PT99021
Category
Protractor & Machinist Square Parts & Accessories
Available to Order
Also known as:PT99021STARRETT
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Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
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Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

STARRETT
Manufacturer Part Number
PT99021
Type
Smooth, Steel
Compatible Blade Lg
4 in

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STARRETT Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The STARRETT Lock Bolt Assembly is a steel protractor and machinist square accessory with a smooth finish, designed for use with 4-inch compatible blades. This OEM part (MPN PT99021) is manufactured by STARRETT and serves as a replacement or component for precision measurement tools.

Frequently Asked Questions

What is the STARRETT Lock Bolt Assembly used for?

The STARRETT Lock Bolt Assembly is a replacement component for protractors and machinist squares. It secures the blade at a desired angle during precision measurement tasks. This steel, smooth-finish part is compatible with 4-inch blades and is commonly used in metalworking, toolmaking, and quality inspection applications.

What are the specifications of the STARRETT Lock Bolt Assembly?

The STARRETT Lock Bolt Assembly (MPN PT99021) is made of steel with a smooth finish. It is designed for use with 4-inch compatible blades and is a direct OEM replacement part. Key identifiers include model 33HC-4-4R and cross-reference 11H-4-4R. It is manufactured by STARRETT for precision measurement tools.

Where to buy the STARRETT Lock Bolt Assembly worldwide?

3G Electric supplies the STARRETT Lock Bolt Assembly worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this OEM part (PT99021) for your precision measurement tools. We provide reliable sourcing and shipping to any country.

How to install the STARRETT Lock Bolt Assembly?

To install the STARRETT Lock Bolt Assembly, first ensure the tool is clean and free of debris. Insert the bolt through the protractor or square head, align it with the 4-inch blade, and tighten securely using the appropriate wrench. Avoid over-tightening to prevent damage. Refer to the tool's manual for torque specifications.

Used in

Common applications for STARRETT
Structural steel fabrication — TENNAX™-PRO bi-metal band saw blades for cutting beams and channels
Stainless steel pipe cutting — Advanz™ CS carbide-tipped band saw blades for abrasive material
Aluminum extrusion cutting — Duratec™ SFB carbon steel band saw blades for soft metals
General metalworking maintenance — Intenss™ PRO-DIE high-speed steel band saw blades for mixed metals
Hard alloy tool steel cutting — Intenss™ PRO bi-metal band saw blades with hook edge
Wood and non-ferrous material sawing — Duratec™ SFB carbon steel blades for multi-material shops
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STARRETT Products

3G Electric supplies STARRETT protractor & machinist square parts & accessories. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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