PEC Tools Lock Bolt Part for 12"/18"/24" Combination Square, for Fastening Square, Protractor, or Center Head, Easy to Install, PEC Trusted by Professionals Since 1960
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- Compatible with components of 12", 18", and 24" combination square (square, protractor, or center heads).
- Constructed of high quality steel to provide reliability and handle use in a wide range of conditions.
- Lock bolt part for combination square heads to fasten blades in place.
- Easy to install replacement for lost or damaged original parts.
- Founded in 1960, PEC Tools is committed to bring quality, professional level tools to our customers.
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Select a product to estimate shipping.12” Machinist Blade
The 12" Machinist Blade is crafted from tempered stainless steel. Its 4R graduation system offers exceptional readability from 8ths to 64ths of an inch. The deep-etched markings are engineered to maintain their clarity through years of heavy use and with its satin chrome finish, you'll get clear readings even in low-light conditions.
Protractor Head
Reading both forward and reverse from 0 to 180 degrees, this versatile head lets you measure, mark, and verify any angle with confidence. Whether you're setting compound miters or checking critical angles on machined parts, the finely graduated markings and smooth locking mechanism ensure repeatable accuracy every time.
Center Head
This ingenious attachment makes finding the center of round stock or square materials virtually foolproof. By marking intersecting lines across curved surfaces, you can pinpoint center locations with professional accuracy. It's particularly valuable for lathe work, pattern making, or any project requiring precise centerline layouts on cylindrical objects.
Square Head
Built with precision-ground faces for both 45° and 90° applications, the Square Head features an integrated bubble level for instant alignment verification. The included hardened scriber point lets you mark your measurements directly on your workpiece when pencil marks won't suffice.
Product details








| Main Specification | |
|---|---|
| Manufacturer | Pec Tools |
| Unit Count | 1 Count |
| Brand | Pec Tools |
| Number of Items | 1 |
| Included Components | Lock Bolt Part |
| Material | Alloy Steel |
| Colour | Fastening Lock Bolt |
| Style | Fastening Lock Bolt For 12"/18"/24" Squares |
| Technical Details | |
| Part Number | 12CSA |
| Material Type | Alloy Steel |
| Style | |
| Style Name | Fastening Lock Bolt For 12"/18"/24" Squares |
| Others | |
| Product Type | Carpentry Squares |







