FastenersFromTurkey supplies nylon insert, all-metal and flange lock nuts from Turkey for OEM, distributor and project RFQs. Locking mechanism, standard or drawing, thread, material or class, finish, temperature, prevailing-torque test, documentation and quantity are confirmed for each order.
Nylon insert, all-metal and flange lock nuts arranged for industrial sourcing from Turkey
Confirm these order-specific inputs before quotation.
| Field | Order input | Confirmation |
|---|---|---|
| Product scope | Nylon insert, all-metal or flange lock nut for the stated joint | Locking mechanism and application confirmed per RFQ |
| Standard/drawing | Applicable ISO or DIN reference, controlled drawing or customer specification | Governing revision confirmed per RFQ |
| Dimensions/thread | Thread system, size, tolerance class, engagement and mating fastener | Dimensional inputs confirmed per RFQ |
| Material/mechanical | Material, property class, proof-load and mating-bolt requirements | Order requirement confirmed before quotation |
| Finish/coating | Finish, coating, friction, corrosion and service-temperature requirements | Finish scope confirmed per RFQ |
| Documentation | Required certificate, prevailing-torque test, inspection report or TPI scope | Availability and deliverables confirmed per order |
| Commercial | Quantity, MOQ drivers, packing, Incoterm and destination | Commercial basis confirmed in the quotation |
| Supplier role | FastenersFromTurkey supplies lock nuts from Turkey. | Order-specific supply scope confirmed from the RFQ |
Values remain order-specific until confirmed in the quotation.
Lock nuts resist loosening through different mechanisms, and the mechanism must match the joint. Start with the locking method, then confirm the type family, the applicable standard and the prevailing-torque or reuse requirement before a configuration is specified.
Prevailing-torque and surface-bearing lock nuts create resistance in different ways. A standard free-spinning nut provides neither feature unless the joint uses a separate locking method.
Compare locking mechanisms
Temperature, chemicals, coating, lubrication, joint surface and the required prevailing-torque test can eliminate otherwise similar-looking options between nylon insert, all-metal and flange lock nuts.
Compare lock nut types
A familiar DIN designation does not guarantee equivalence with a current ISO product. Metric and inch thread systems must not be substituted without engineering and customer approval.
Review standards and thread checks
Prevailing torque is the resistance generated by the locking feature during relative rotation. It is distinct from the tightening torque used to create joint preload, and reuse should not be assumed.
Review prevailing-torque testing and reuseLock nuts resist loosening through different mechanisms, and the mechanism must match the joint. Nylon insert and many all-metal designs create prevailing torque before the nut seats. Other types develop locking action at the bearing surface after seating.
| Mechanism | How locking is produced | Buyer checks |
|---|---|---|
| Non-metallic insert prevailing torque | The insert creates resistance on the mating thread | Insert material, temperature and chemical exposure, thread fit, reuse acceptance |
| All-metal prevailing torque | Controlled metal-thread deformation creates resistance | Nut style, functional torque, coating, lubrication and mating bolt |
| Surface-bearing locking | The locking feature acts when the nut seats on the joint | Flange or serration geometry, bearing surface, joint material and direction |
This industrial fastener range does not include bearing locknuts, conduit locknuts, wheel-security nuts or furniture cam fittings; those products use different selection and performance criteria.
A prevailing-torque locknut creates rotational resistance through an insert or a controlled deformation in the nut thread. This resistance exists independently of final clamp load, so it is measured during installation and removal as well as after defined test cycles. It does not replace a validated tightening specification or prove that the joint has reached the required preload. Nylon insert and all-metal designs can both fall within this family, but they are not interchangeable by name alone. Insert material, thread form, nut style, property class, coating, lubrication and the mating thread influence functional behavior.
Surface-bearing designs develop their locking action when the nut contacts the joint. A flange can distribute load, while serrations or another seating feature may increase resistance to rotation. Bearing-surface condition, joint material, installation direction and whether the flange is serrated or smooth therefore become part of the specification.
Choose between nylon insert, all-metal and flange lock nuts by starting with the specified mechanism and service conditions. The product standard or controlled drawing governs the final configuration.
| Type family | Use when | Verify before RFQ |
|---|---|---|
| Nylon insert lock nuts | A non-metallic insert is permitted within the verified service range | Insert material, thread, class, coating, temperature, chemicals and reuse criteria |
| All-metal lock nuts | The drawing or application requires an all-metal prevailing-torque design | Style, product standard, prevailing torque, class, coating/lubrication and mating bolt |
| Flange lock nuts | The joint needs an integrated bearing surface or specified flange-locking feature | Flange/serration design, bearing surface, direction, joint material and standard/drawing |
Temperature, chemicals, coating, lubrication, joint surface and the required prevailing-torque test can eliminate otherwise similar-looking options.
A nylon insert lock nut uses a non-metallic ring to create resistance on the mating thread. Buyers may also call it a nyloc nut, but the generic product description should remain nylon insert lock nut. Confirm the insert material, thread system, nut style, property class, coating and the application's temperature and chemical exposure before quotation.
An all-metal lock nut uses controlled deformation in part of the metal thread or nut body. This removes the non-metallic insert from the locking mechanism, but it does not create one universal performance class. Stover nut and top lock nut are common buyer terms for selected styles; the offered geometry, standard, torque behavior and mating-bolt requirements must still be identified.
A flange lock nut combines the nut body with an enlarged bearing surface. Some variants use an all-metal prevailing-torque feature; others rely on serrations or a defined bearing-surface action. Specify whether the flange is smooth or serrated, the required installation direction, joint material and any surface-damage restrictions.
A lock-nut standard can define product geometry, functional properties or both. State the exact reference and edition because a familiar DIN designation does not guarantee equivalence with a current ISO product.
| Reference | RFQ role | Application boundary |
|---|---|---|
| ISO 2320:2015 | Functional properties and combined prevailing-torque/torque-clamp testing for qualifying steel nuts | Applies only within its stated thread, material and test-condition scope |
| ISO 7040:2025 | Regular metric prevailing-torque hexagon nuts with non-metallic insert | Use for matching regular-nut configurations, not every nylon insert style |
| ISO 7719:2025 | Regular metric all-metal prevailing-torque hexagon nuts | Use for matching regular all-metal configurations |
| ISO 7044:2012 | All-metal prevailing-torque hexagon flange nuts, style 2 | Do not apply to every flange or serrated nut |
| ASME B18.16.6-2017 (R2022) | Inch-series nylon insert and all-metal prevailing-torque locknuts within defined styles | Confirm grade, style, size and performance requirements |
Metric and inch-series requirements use different thread systems and must not be substituted without engineering and customer approval.
DIN 985 and DIN 982 remain common purchasing and drawing language. Treat them as legacy references that must be mapped against the required current ISO product, dimensions and purchase specification. “Applicable” does not mean “equivalent in every detail.”
Specify metric coarse or fine pitch, or the required inch thread series, together with diameter, pitch or threads per inch and tolerance. Nut property class and mating-bolt class must be reviewed as a combination. Proof load, thread engagement, coating buildup and the condition of the test or production bolt can all affect acceptance. The drawing remains controlling when it adds dimensions, tolerances, material, coating, prevailing-torque limits, proof-load requirements or customer-specific testing beyond the product standard before approval.
Material and finish should be specified as a functional system. Coating color alone cannot define corrosion performance, friction behavior or compatibility with the mating fastener.
State the required material or property class and whether the mating bolt is already fixed. For stainless requirements, identify the required stainless grade and mechanical class rather than requesting “stainless” as a generic condition. Mixed-material joints also require a corrosion and galling assessment appropriate to the application.
Provide the actual service environment. Fixed temperature limits, salt-spray hours, coating thicknesses and reuse allowances should come from the applicable standard, product data and approved purchase specification—not from a generic family claim.
Carbon steel, alloy steel and stainless lock nuts may be reviewed where the selected manufacturing route supports the required style and standard.
| RFQ input | Why it matters | Evidence to define |
|---|---|---|
| Material and property class | Controls mechanical compatibility and proof-load requirements | Standard/drawing and supplier confirmation |
| Coating and finish | Affects corrosion, friction, dimensions and appearance | Coating specification, thickness where required and test method |
| Corrosion target | Converts a finish request into a measurable acceptance criterion | Test standard, duration, pass/fail condition and post-treatment |
| Lubrication/friction condition | Can change installation and prevailing-torque behavior | Approved condition or sample/test plan |
| Temperature and chemicals | Can affect insert material, coating and functional performance | Application range and customer specification |
| Hydrogen-embrittlement control | May be critical for high-strength electroplated parts | Approved process, relief treatment and test requirement where applicable |
Prevailing torque is the resistance generated by the locking feature during relative rotation. It is distinct from the tightening torque used to create joint preload. Acceptance depends on the product standard, nut size and class, mating thread, coating/lubrication and test conditions; a generic torque chart cannot establish suitability.
Prevailing-on torque is measured while the nut advances through the locking feature before final seating. Prevailing-off torque is measured during removal under the defined test sequence. The test method may also evaluate torque-clamp behavior, but values must be taken from the controlling standard, drawing and purchase specification for the exact part.
ISO 2320 functional testing includes defined installation and removal cycles for qualifying prevailing-torque steel nuts. Those laboratory cycles must not be converted into a blanket field-reuse promise. Reuse depends on the customer or product specification, installation/removal history, thread and coating condition, and verified remaining prevailing torque. If the drawing prohibits reuse, that requirement controls.
Send the standard or drawing, thread, class, coating/lubrication condition and required torque criteria for review. Prevailing torque is a system property involving the nut, mating bolt and thread, coating or lubricant, and the installation cycle. ISO 2320 supplies a test framework only where its scope applies; the customer drawing, assembly specification and agreed acceptance criteria remain controlling.
Use this checklist before requesting a quotation:
| # | Checklist question |
|---|---|
| 1 | Is the locking method specified, or should alternatives be compared? |
| 2 | Is a non-metallic insert permitted by temperature, chemical and customer requirements? |
| 3 | Does the drawing require an all-metal or flange configuration? |
| 4 | What thread system, diameter, pitch and tolerance apply? |
| 5 | What nut property class and mating-bolt class are required? |
| 6 | What coating, lubrication and corrosion acceptance apply? |
| 7 | Are prevailing-on/off torque, proof-load or retention tests required? |
| 8 | Is reuse permitted, restricted or prohibited? |
| 9 | What documentation, inspection and traceability are required? |
Lock nuts can support automotive and transport assemblies, machinery, industrial equipment, structural assemblies and distributor stock programs when the selected product is approved for the joint.
Application labels are not approvals. The controlled drawing, customer specification and validation plan determine whether a particular design is acceptable for automotive and transport assemblies, machinery, industrial equipment, structural assemblies and distributor stock programs.
FastenersFromTurkey supplies lock nuts from Turkey after reviewing the specification, documentation, packaging, delivery requirements and order-specific feasibility.
Order-specific feasibility and supply scope are assessed from the applicable standard or drawing, thread, property class, mating bolt, coating, service conditions and prevailing-torque requirement. Manufacturing capability is confirmed after evidence review; it is not assumed across every lock-nut type.
Documentation availability is confirmed against the selected manufacturing route and purchase specification. FastenersFromTurkey can coordinate the agreed evidence package without transferring a factory, laboratory or certificate-holder claim to the FastenersFromTurkey brand.
The RFQ may request EN 10204 inspection documents where applicable, dimensional or mechanical reports, coating records, lot traceability, PPAP/APQP coordination or third-party inspection.
The exact document type, issuing party, inspection scope, witness point and acceptance criteria must be agreed before order. Commercial export documents can also include the certificate of origin, packing list and invoice required for the shipment.
Packaging and delivery terms are quoted from the approved product and order profile. State both the initial order quantity and expected annual demand so the manufacturing route, carton quantity, pallet format and freight basis can be compared on consistent terms.
Define inner packs, carton or bulk packing, labels, batch identification, palletization and any moisture-protection requirement.
FastenersFromTurkey coordinates export enquiries from Bursa, Türkiye, for Europe, the Middle East, North Africa, Central Asia and the USA. EXW, FOB Turkish port (Istanbul, Izmir/Aliaga, Mersin, Gemlik, Iskenderun or Derince), CFR and CIF may be reviewed according to the RFQ.
MOQ, lead time, payment terms and price are confirmed for the selected product, quantity, documentation and delivery route. They are not fixed across the complete lock-nut family.
Send a complete technical and commercial requirement to receive a comparable lock-nut quotation review:
| # | Provide in the RFQ |
|---|---|
| 1 | Standard and edition, customer specification or controlled drawing. |
| 2 | Lock-nut type and locking mechanism. |
| 3 | Metric or inch thread, diameter, pitch and tolerance. |
| 4 | Nut property class or material and mating-bolt class. |
| 5 | Dimensions and drawing revision. |
| 6 | Coating, lubrication and corrosion requirement. |
| 7 | Prevailing-on/off torque, proof-load or reuse criteria. |
| 8 | Inspection documents, traceability and third-party inspection needs. |
| 9 | Order quantity, annual volume and delivery schedule. |
| 10 | Packaging, labels, destination country/port and Incoterm. |
A nylon insert lock nut creates prevailing torque through a non-metallic insert, while an all-metal lock nut uses a controlled metal-thread deformation. Selection depends on the product standard, service temperature and chemicals, thread and property class, coating, mating bolt and required prevailing-torque performance.
No. Nylon insert and many all-metal lock nuts use a prevailing-torque mechanism. Other lock nuts rely on a flange, serration or another surface-bearing feature that develops its locking action when seated. The specified standard or drawing should identify the required mechanism.
Reuse should not be assumed. It depends on the applicable product and customer specification, the installation and removal history, thread and coating condition, and whether the remaining prevailing torque still meets the required acceptance criteria.
The applicable standard depends on the lock-nut type, dimensions and thread system. ISO 2320 covers functional properties for prevailing-torque steel nuts, while current ISO product standards define specific metric nut styles. ASME B18.16.6 covers specified inch-series prevailing-torque locknuts. Confirm the exact edition and drawing requirements for each RFQ.
Provide the standard or drawing, lock-nut type, thread diameter and pitch, property class and mating bolt, material, coating and lubrication, torque or proof-load criteria, inspection documents, quantity, packaging, destination and requested delivery terms.
FastenersFromTurkey supplies nylon-insert, all-metal and flange lock nuts from Turkey. Send the locking mechanism, standard or drawing, thread and tolerance, mating bolt, material or property class, coating and lubrication, temperature, required prevailing-torque or reuse criteria, document scope, quantity, packing, Incoterm and destination.
Email: sales@fastenersfromturkey.com
Phone: +90 543 928 19 76
Send the standard or drawing with the locking mechanism, thread, class, coating and prevailing-torque requirements so order-specific feasibility and supply scope can be confirmed.
Discuss Lock Nut RequirementsPrevailing torque is a system property involving the nut, mating bolt and thread, coating or lubricant, and the installation cycle. ISO 2320 supplies a test framework only where its scope applies; the customer drawing, assembly specification and agreed acceptance criteria remain controlling.