Wire Thread Insert Manufacturer · Product Selection · Bulk & OEM Supply
Wire Thread Inserts: Types, Sizes and Material Options
Taiyi manufactures helical wire thread inserts for thread repair, reinforcement and production assembly, with Metric, UNC and UNF configurations for industrial and distributor supply.
Product selection can include free-running or screw-locking function, tanged or tangless installation design, common D-lengths, stainless steel or customer-specified alloys such as Inconel X-750, bulk packaging and OEM programs.
A wire thread insert is a helically formed insert installed into a prepared STI thread. After installation, its internal surface provides the specified nominal thread for the mating fastener.
Product Range at a Glance
Wire Thread Insert Product Range
Use this overview to confirm whether the required thread system, insert function, installation design, length and supply format are available for quotation.
Standard-size product selection
Common Metric Wire Thread Insert Sizes for Bulk Orders
Select the finished screw-thread designation first, followed by the insert length, material, free-running or locking type, and installation style. The metric examples below are widely used industry designations for quoting wire thread inserts; a listed size does not imply every configuration is held in stock.
Swipe horizontally to compare metric thread sizes and nominal lengths.
| Finished metric thread | Pitch | 1.5D nominal length | Product selection |
|---|---|---|---|
| M3 × 0.5 | 0.50 mm | 4.5 mm | Specify style and packaging in the RFQ |
| M4 × 0.7 | 0.70 mm | 6 mm | Specify style and packaging in the RFQ |
| M5 × 0.8 | 0.80 mm | 7.5 mm | Specify style and packaging in the RFQ |
| M6 × 1.0 | 1.00 mm | 9 mm | M6 insert and repair details → |
| M8 × 1.25 | 1.25 mm | 12 mm | M8 insert and repair details → |
| M10 × 1.5 | 1.50 mm | 15 mm | Specify style and packaging in the RFQ |
| M12 × 1.75 | 1.75 mm | 18 mm | M12 standard sizes and OEM options → |
The 1.5D values are nominal installed length references (1.5 × screw diameter), not free-state coil dimensions. Fine metric pitches and other D-lengths may require a separate specification. Verify drawings, insert type, STI tooling compatibility and final acceptance requirements before production.
Coarse and drawing-specified fine pitches for approved finished screw threads.
For example, 10-24 UNC, 10-32 UNF, 1/4-20 UNC and 1/4-28 UNF; confirm TPI and thread class.
Customer drawings, special lengths, materials and bulk or private-label packaging can be reviewed for quotation.
Wire Thread Insert Types
Choose the Correct Wire Thread Insert Configuration
A wire insert specification normally requires two separate decisions: first choose the functional behavior, then choose the installation design.
1. Choose the Function
For applications requiring normal mating-screw movement without an additional screw-locking feature.
View free-running inserts →For reviewed applications requiring additional screw-retention behavior.
View screw-locking inserts →2. Choose the Installation Design
Uses a driving tang during installation and may require tang removal after installation.
View tanged inserts →Uses a tangless installation interface and requires compatible tangless tooling.
View tangless inserts →Typical Configuration Combinations
Function and installation design are separate variables. A complete wire insert selection may combine them as follows.
Metric and Inch Product Range
Metric, UNC and UNF Wire Thread Inserts
Thread standard is one of the first purchasing decisions. Coarse and fine threads must match the mating fastener, STI tap and complete installation system.
Metric Wire Thread Inserts
Metric coarse and reviewed fine-pitch requirements can be quoted by nominal size, pitch, D-length, insert function and installation design.
View metric size chart →UNC Wire Thread Inserts
Unified coarse inserts are specified by inch thread designation, TPI, length, function, installation design and material requirement.
View UNC size reference →UNF Wire Thread Inserts
Unified fine inserts require the exact fine-thread designation and matching STI tooling. Do not substitute UNC components for UNF requirements.
View UNF size reference →Size and Specification
How Wire Thread Inserts Are Specified
Nominal screw size alone is not enough to select a wire insert. The full specification controls the installed thread, insert depth, tooling compatibility and quotation.
| Specification | What to Confirm | Why It Matters | Example |
|---|---|---|---|
| Thread Standard | Metric, UNC, UNF or another required system. | Defines mating screw geometry and the matched STI thread. | Metric |
| Nominal Size | Screw diameter or nominal thread designation. | Determines the finished internal thread size. | M8 |
| Pitch or TPI | Metric pitch or inch threads per inch. | Prevents coarse- and fine-thread mismatch. | 1.25 mm |
| Insert Length | 1D, 1.5D, 2D, 2.5D, 3D or another approved length. | Must suit available hole depth and required engagement. | 1.5D |
| Functional Type | Free-running or screw-locking. | Determines whether additional screw-retention behavior is required. | Free-running |
| Installation Design | Tanged or tangless. | Changes the installation interface and process. | Tanged |
| Material | Base alloy, international grade / UNS number and any required material condition. | Material must match the application and purchasing specification. | SS 301 |
| Quantity | Sample quantity and expected production or repeat-order quantity. | Supports the correct commercial and packaging review. | 5,000 pcs |
Wire Thread Insert Materials & Custom Alloy Manufacturing
Wire Thread Insert Materials: Stainless Steel, Inconel X-750 & Special Alloys
Specify wire thread inserts by the alloy your design requires. Taiyi manufactures wire thread inserts for OEM and distributor orders and supports custom material projects by sourcing specified alloy wire, evaluating the forming process and preparing samples for approval.
Alongside stainless steel, customers can request Inconel X-750 wire thread inserts, Nitronic 60 wire thread inserts, Nimonic 90 wire thread inserts, phosphor bronze wire thread inserts and other named alloys. Send the material grade and the part specification together so the insert can be quoted as a complete product.
Need a different material grade? Compare Inconel X-750, Nitronic 60, Nimonic 90, phosphor bronze and other alloys in our wire thread insert materials guide, including the information to send for a custom-alloy quotation.
304 Stainless Steel Wire Thread Inserts
AISI 304 / UNS S30400
A widely used alloy for thread repair and reinforcement in general industrial assemblies. Confirm the required wire condition and insert specification.
316 Stainless Steel Wire Thread Inserts
AISI 316 / UNS S31600
For applications requiring enhanced corrosion resistance compared with general-purpose stainless steel, subject to service conditions.
Inconel X-750 Wire Thread Inserts
Alloy X-750 / UNS N07750
A nickel-chromium alloy specified for selected high-temperature and demanding engineering applications. Custom wire sourcing, material condition and insert samples can be reviewed against your requirements.
Nitronic 60 Wire Thread Inserts
UNS S21800
An anti-galling stainless alloy considered when wear and threaded-fastener friction are important.
Nimonic 90 Wire Thread Inserts
UNS N07090
A nickel-base high-temperature alloy for customer-controlled applications requiring appropriate material and manufacturing review.
Phosphor Bronze Wire Thread Inserts
CuSn6 or another specified bronze grade
A non-ferrous material option for selected corrosion, magnetic-response or assembly requirements. The exact bronze grade and temper must be identified.
Additional Stainless Steel & Special Alloy Materials for Custom Quotes
If your drawing specifies another international alloy grade, include that designation in the inquiry. The lists below identify materials that can be submitted for a sourcing and manufacturing feasibility review; they are not a statement that every grade is stocked, certified or suitable for every insert design.
Stainless Steel & High-Strength Grades
Stainless steel wire thread inserts: 201, 301, 302, 304, 304L, 316, 316L, 316Ti, 321, 347 and 904L.
Special stainless and iron-base grades: 17-7 PH, 17-4 PH, Nitronic 50 (UNS S20910), Nitronic 60 (UNS S21800), Duplex 2205 and Super Duplex 2507.
Nickel-Based Alloys
Nickel alloy wire thread inserts and custom inquiries: Inconel X-750, Inconel 600, Inconel 601, Inconel 625, Inconel 718, Incoloy 825, Nimonic 90, Nimonic 80A and Waspaloy.
Corrosion-resistant alloy inquiries: Hastelloy C-22, Hastelloy C-276, Monel 400, Monel K-500 and Nickel 200.
High-Performance Specialty Alloys
Customer-specified materials may include A-286 (UNS S66286), MP35N (UNS R30035), Elgiloy / Phynox (UNS R30003), and Haynes 25 / L-605 (UNS R30605).
Provide the alloy’s specification, heat-treatment or temper requirement, intended service conditions and inspection needs. Each design is assessed individually.
Copper, Titanium & Other Non-Ferrous Alloys
Copper-alloy options: Phosphor Bronze CuSn6, Phosphor Bronze C51000, Silicon Bronze, Beryllium Copper C17200 and Copper-Nickel 90/10.
Titanium and other inquiries: Titanium Grade 2, Titanium Grade 5 (Ti-6Al-4V) and customer-specified high-strength aluminum alloy wire. Confirm whether a helical wire insert is appropriate for the application.
Custom Material Wire Thread Inserts for OEM & Distributor Orders
Need a particular alloy rather than a standard stainless steel insert? We can assess specified wire sourcing, insert forming, sample production, volume planning and packaging. Send the exact international material designation instead of substituting a different alloy name.
Availability, mechanical and dimensional acceptance, heat treatment, required test reports and delivery conditions are agreed during quotation and sample approval.
Include in Your Material-Specific RFQ
- Alloy name, UNS grade or material specification
- Metric / UNC / UNF size and pitch or TPI
- Insert length and free-running / locking type
- Tanged or tangless installation design
- Material condition, finish and operating environment
- Drawings, inspection and certification needs
- Sample quantity and annual / bulk order quantity
Standards and Customer Specifications
Specify the Required Standard Before Quotation
Wire thread insert requirements may be controlled by an industry standard, customer drawing, material specification, inspection requirement or approved equivalent. Include those requirements before quotation rather than assuming that a generic insert automatically meets them.
Industry Standard
Buyers may reference DIN, MS, NAS/NASM, BS or another industry specification. Compliance must be confirmed against the actual quoted product.
Customer Drawing
For controlled dimensions, special lengths, material, finish, packaging or inspection, send the current drawing or approved reference.
Certificates & Inspection
State any material certificate, dimensional report, sampling level, traceability or inspection documentation required with the order.
Thread System
Wire Thread Inserts Use a Prepared STI Thread
Wire inserts are part of a complete thread system. The receiving hole must be prepared for the insert before installation.
Prepare the Hole
Hole condition and drilling requirement depend on the application and selected insert system.
Create the STI Thread
A matching STI tap creates the oversized receiving thread required for the wire insert.
Install the Wire Insert
Compatible installation tooling places the insert at the required depth.
Use the Finished Internal Thread
After correct installation, the insert provides the specified internal thread for the mating fastener.
Need Technical Installation Data?
For drilling, STI tapping, installation depth, tang handling and troubleshooting, use the step-by-step technical references below.
- Metric STI drill-size reference
- STI tap selection
- Installation tools
- Complete installation procedure
Applications
Where Wire Thread Inserts Are Used
Wire inserts are selected according to the parent component, thread condition, load, assembly cycle and service environment.
Damaged Thread Repair
Restore stripped, worn or damaged internal threads while retaining the required nominal mating screw size.
View thread repair guide →Thread Reinforcement
Provide a durable threaded interface in suitable parent components where repeated fastening or stronger thread engagement is required.
Thread inserts for aluminum →Industrial Assembly and Maintenance
Standardize threaded-hole repair or reinforcement across machinery, fixtures, housings, equipment and maintenance programs.
Stainless steel applications →Production and OEM Assemblies
Wire inserts can be specified in housings, machinery, automotive, electronics and other engineered assemblies where repeatable threaded performance is required.
OEM supply options →Matched Products
STI Taps, Installation Tools and Thread Repair Kits
These products support the wire insert system but have their own selection requirements. Use the dedicated pages for detailed tooling and kit information.
STI Taps
STI taps create the receiving thread required for the selected wire thread insert.
View STI taps →
Installation Tools
Select compatible installation tooling according to insert type, size and production requirement.
View installation tools →
Thread Repair Kits
Kits can combine inserts, drill bits, STI taps and installation tools for maintenance and repair programs.
View thread repair kits →Bulk, OEM and Distributor Supply
Bulk Wire Inserts, Refill Packs and Production Supply
Taiyi manufactures wire thread inserts for OEM, bulk and distributor requirements. Send the required insert specification, alloy grade, quantity and packaging needs for pricing and production planning.
Swipe horizontally to view the full table →
| Buying Requirement | What to Send | Typical Supply Format | Commercial Review |
|---|---|---|---|
| Bulk Wire Inserts | Thread size, pitch/TPI, D-length, function, design, material and quantity. | Bulk bag, box or agreed production packaging. | MOQ, lead time, batch quantity and destination. |
| Refill Packs | Insert specification plus pieces per refill pack. | Size-specific refill packaging. | Pack count, label, barcode and reorder quantity. |
| Distributor Range | Target sizes, assortment structure and channel requirements. | Bulk, retail or mixed distributor packaging. | Range planning, pack format, barcode and replenishment. |
| Private Label / OEM | Artwork, brand, label, barcode, packaging and target order quantity. | Customer-branded packaging subject to approval. | Artwork review, tooling, packaging MOQ and repeat-order plan. |
| Production Supply | Annual forecast, batch quantity, specification and delivery schedule. | Production lots or scheduled shipments. | Forecast, capacity review, inspection and delivery planning. |
| Custom / Controlled Insert | Drawing, sample, material, standard and inspection requirement. | Quoted against approved technical requirements. | Manufacturability, samples, tooling and quality documentation. |
Wire Thread Insert Manufacturer
Review Taiyi production capability, factory information, inspection methods and manufacturing support on the dedicated manufacturer page.
OEM and Distributor Programs
Review bulk packaging, private-label programs, barcodes, artwork, distributor ranges and commercial supply requirements separately.
Industrial wire insert manufacturing
Wire Thread Insert Production & Repeat-Order Controls
Taiyi manufactures wire thread inserts for specified repair and production requirements. These existing factory images show general forming equipment rather than a guaranteed stock photograph of each listed insert size or alloy. Buyers can use a controlled insert drawing and agreed acceptance criteria for repeat supply.
Submit an existing sample, drawing or mating-thread requirement for fit and insert-length review.
Agree the material grade, sampling criteria, gaging and any required certificates before ordering.
Set size-specific pack counts, labeling, batch identification, MOQ and delivery schedule in the quotation.
Wire Thread Insert RFQ
Information Required for an Accurate Quote
A complete RFQ allows the insert specification and commercial requirement to be reviewed together.
For non-standard inserts, existing samples, drawings or current product references are useful for comparison.
Include these details
- Thread standard
- Nominal size
- Pitch or TPI
- Insert length
- Free-running or screw-locking
- Tanged or tangless
- Material grade / UNS, including special alloys
- Parent material
- Through or blind hole
- Repair or new production
- Quantity by size
- Sample requirement
- Packaging format
- Certificate requirement
- Required delivery date
- Destination country or port
FAQ
Wire Thread Insert Questions
What is a wire thread insert?
A wire thread insert is a helically formed insert installed into a prepared STI thread. It creates or restores the internal thread used by the mating screw or fastener.
What are wire thread inserts used for?
They are commonly used for damaged-thread repair, thread reinforcement and repeated assembly applications where a durable internal threaded interface is required.
What is the difference between free-running and screw-locking wire inserts?
Free-running inserts allow normal screw movement. Screw-locking inserts are specified where additional screw retention is required. The locking requirement should be reviewed with the mating fastener and operating conditions.
What is the difference between tanged and tangless wire thread inserts?
Tanged inserts use a driving tang during installation. Tangless inserts use a compatible tangless installation interface and do not require a break-off driving tang.
What sizes are available for wire thread inserts?
Wire inserts are specified by thread standard, nominal size, pitch or TPI and insert length. See the Thread Insert Size Chart for the dedicated size reference.
Which materials can be specified for wire thread inserts?
Customers can request stainless steel grades including 201, 301, 304 and 316, as well as special materials such as Inconel X-750, Nitronic 60, Nimonic 90, phosphor bronze and other customer-specified alloys. Supply is quoted against the exact grade, insert design, quantity and acceptance requirements.
Can Taiyi manufacture Inconel X-750 wire thread inserts?
We accept Inconel X-750 (Alloy X-750 / UNS N07750) wire thread insert inquiries for custom production. Send your drawing, required material condition, thread size, insert length and quantity. Wire sourcing, forming, samples, inspections and any documentation are confirmed for the specific order.
Can you source a customer-specified special alloy wire?
Taiyi can evaluate sourcing of specified international alloy wire for custom helical insert projects. Feasibility depends on the exact alloy, required wire form, dimensions, treatments and product acceptance criteria.
Are custom alloy wire thread inserts supplied with material certificates?
Tell us which documents and traceability level your purchase requires. Certificate availability and any material or finished-insert standard compliance must be confirmed before an order is accepted; a material designation alone is not proof of certification.
Do wire thread inserts require an STI tap?
The receiving thread for a wire insert is an STI thread. The STI tap must match the insert thread system and specification. A standard tap should not be assumed to be interchangeable with the required STI tap.
What information should I send for a wire thread insert quotation?
Send the thread standard, nominal size, pitch or TPI, insert length, free-running or locking requirement, tanged or tangless design, material, application, quantity and packaging requirement.
Can I buy wire thread inserts in bulk or private-label packaging?
Yes. Bulk inserts, refill packs, distributor packaging and private-label programs can be reviewed against the required insert specification, quantity, artwork, barcode and packaging format.
Can wire thread inserts be supplied to a specific industry standard?
The required standard must be identified before quotation. Send the applicable DIN, MS, NAS/NASM, BS, customer drawing or other controlled specification together with any material, inspection and certificate requirements.
Are Taiyi wire inserts official HELICOIL products?
No. Taiyi supplies independent generic helical wire thread inserts and related thread-repair products. HELICOIL and Heli-Coil are trademarks of their respective owners.
Wire Thread Insert Product Inquiry
Need Wire Thread Inserts for Samples or Production Orders?
Send the thread standard, size, pitch or TPI, insert length, functional type, tanged or tangless design, exact material grade or UNS number, application, quantity and packaging requirement for review.
HELICOIL and Heli-Coil are trademarks of their respective owners. Taiyi Thread Inserts is an independent manufacturer and supplier of generic helical wire thread inserts and related thread-repair products. Trademark references are descriptive only and do not indicate affiliation, authorization or endorsement. Material trade names are used solely to identify customer-specified alloys.