M8 Phillips Head Shoulder Bolt with Step – Carbon Steel Specialty Bolt - HomeDIYer

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M8 Phillips Head Shoulder Bolt with Step – Carbon Steel Specialty Bolt

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Thread Ø x length: M8*94mm(Half thread)

Thread length: 15mm

QTY(pcs): 1

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$13.04 USD

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Verfügbar (500 Stück), versandbereit

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M8 Shoulder Bolt with Step — The Reliable Pivot & Spacer Fastener for Precision Assemblies

When a standard bolt just won't do — when you need a part that pivots freely, spaces components accurately, or acts as a guide pin — a shoulder bolt is the right tool. Machinists, fabricators, toolmakers, and serious DIYers working on jigs, fixtures, die sets, and mechanical linkages know that the unthreaded shoulder is what makes the difference. This M8 shoulder bolt with step is built for exactly those demanding applications.

Each bolt measures M8 × 94mm (≈3.7") in total length, with a precision-machined step shoulder and a 15mm (≈0.6") half-thread section at the tip. The body is carbon steel, offering solid mechanical strength for general industrial and workshop use. The Phillips (cross) head drive makes installation straightforward with standard tooling. Available in sets of 1, 3, 5, 8, or 10 pieces to match your project scale.

Typical use cases include die and mold assemblies where the shoulder acts as a stripper bolt, mechanical linkages and pivot joints in custom fabrication, jig and fixture construction requiring repeatable part alignment, and woodworking or metalworking machinery where a step bolt guides moving components. Whether you're building a press tool or repairing industrial equipment, this M8 step bolt delivers the dimensional consistency your assembly demands.

🔩 Thread Compatibility: M8 metric thread (coarse pitch 1.25mm standard) — fits standard M8 tapped holes. Half thread length: 15mm. Verify your mating thread depth before ordering.

✅ Key Features of These M8 Phillips Head Shoulder Bolts with Step

📐 Precision Step Shoulder Design — The machined unthreaded shank provides a true bearing surface for pivot joints, guide pins, and spacer applications in jigs and fixtures.
⚙️ M8 Half-Thread Configuration — A 15mm threaded section keeps the bolt securely anchored while leaving the shoulder free to function as a pivot or slide surface — ideal for stripper bolt applications in die sets.
🔨 Carbon Steel Construction — Offers dependable tensile strength for general mechanical assemblies, tooling, and workshop fixtures where a balance of strength and machinability is needed.
🪛 Phillips Head Drive — Compatible with standard #2/#3 Phillips bits and screwdrivers, making installation fast and accessible without specialized tooling.
📦 Flexible Quantity Options — Available in 1, 3, 5, 8, or 10 pieces so you can order exactly what your project requires — from a single replacement to a full set for a production run.
🏭 Consistent Dimensional Accuracy — Machined to maintain shoulder diameter and length tolerances critical for repeatable alignment in mechanical linkages and precision tooling assemblies.

⚠️ Heads up: This listing covers the M8 × 94mm half-thread variant with a 15mm thread length. If you need a different shoulder diameter, total length, or full-thread configuration, please contact us to confirm availability before ordering.

📐 Technical Specifications — M8 Step Shoulder Bolt

Thread Size	M8
Total Length	94mm (≈3.7")
Thread Length	15mm (≈0.6")
Thread Type	Half thread (partial thread)
Thread Pitch	1.25mm (standard M8 coarse — contact us to confirm)
Head Type	Phillips (cross) head
Material	Carbon steel
Surface Finish	See variant options
Shoulder Diameter	See variant options
Drive Size	Typically #2 or #3 Phillips bit
Available Quantities	1 / 3 / 5 / 8 / 10 pcs per order
Tensile Strength	Contact us to confirm (carbon steel grade varies)
Corrosion Resistance	Not inherently corrosion-resistant — see FAQ
Country of Origin	Contact us to confirm

❓ Frequently Asked Questions

How do I choose the right shoulder bolt length for my application?

The shoulder (unthreaded shank) length is the critical dimension — it determines the pivot or spacer gap in your assembly. This bolt has a total length of 94mm (≈3.7"): the shoulder section spans the majority of the shank, while the threaded portion is 15mm (≈0.6"). Measure the thickness of the parts you need to clamp or pivot, then select a shoulder length that matches. When in doubt, size up slightly and use a washer to fine-tune the fit.

What thread size and pitch does this shoulder bolt use?

This bolt uses an M8 metric thread. Standard M8 coarse pitch is 1.25mm, which is the most common pitch for M8 fasteners. If your application requires a fine-pitch M8 thread, please contact us to confirm compatibility before ordering.

How strong is this shoulder bolt — what load can it handle?

This bolt is made from carbon steel, which typically offers a tensile strength in the range of 400–830 MPa depending on grade and heat treatment. For structural or safety-critical applications, please verify the specific grade with us before use. For general mechanical assemblies, jigs, fixtures, and pivot points, carbon steel shoulder bolts are generally well-suited.

Can this bolt be used outdoors or in wet environments?

Carbon steel is not inherently corrosion-resistant. For outdoor or humid environments, we recommend applying a protective coating (paint, grease, or thread sealant) after installation, or consider pairing with stainless steel hardware where corrosion resistance is a priority. If your project requires outdoor-rated fasteners, contact us about available surface treatment options.

What driver do I need to install this bolt?

This bolt features a Phillips (cross) head drive. A standard #2 or #3 Phillips screwdriver or bit is typically used for M8-range Phillips head bolts. For best results and to avoid cam-out, use a properly sized bit and apply firm, steady pressure during installation.

What is the difference between a shoulder bolt and a regular bolt?

A shoulder bolt (also called a stripper bolt or step bolt) has a precision-machined unthreaded shank (the "shoulder") between the head and the threaded section. This shoulder acts as a bearing surface, pivot pin, or spacer — allowing parts to rotate or slide freely around it. A regular bolt is fully or partially threaded and is designed to clamp parts together, not to serve as a pivot or guide.

How many pieces do I need to order?

This listing is available in quantities of 1, 3, 5, 8, or 10 pieces. Select the quantity that matches your project needs using the QTY option above. Ordering in larger quantities offers better per-unit value and ensures you have spares on hand.

🛒 Select your size and quantity above, then add to cart — ships from our US warehouse.

M8 Phillips Head Shoulder Bolt with Step – Carbon Steel Specialty Bolt

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Beschreibung

M8 Shoulder Bolt with Step — The Reliable Pivot & Spacer Fastener for Precision Assemblies

✅ Key Features of These M8 Phillips Head Shoulder Bolts with Step

📐 Technical Specifications — M8 Step Shoulder Bolt

❓ Frequently Asked Questions

M8 Phillips Head Shoulder Bolt with Step – Carbon Steel Specialty Bolt

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