m5 Brass Inserts

About m5 Brass Inserts

M5 Brass Threaded Insert Blind Insert (Closed End) with Single Groove & External Diamond Knurling

• M5 internal thread (ISO metric) accurate 6H tolerance
• Brass C360 / C465 material excellent machinability & conductivity
• Blind (closed) end on one side prevents leak-through / dust ingress
• External diamond knurling for ultrasonic/heat insertion and high retention
• One circumferential groove for glue/retention / O-ring seating
• Optional finishes: Nickel plating, Tin plating, Passivation (matte)
• Export pack, certificates available: ISO 9001 QC traceability, RoHS/REACH on request
• OEM customization & private labelling available

Product Description

Our M5 Brass Threaded Inserts are precision-machined components designed for reliable threaded connections in plastics, wood, FRP and soft metals. Available as a blind (closed-end) insert, this product is ideal where the screw entry must be sealed. The outside profile features diamond knurling for ultrasonic and heat-staking fixation and a single circumferential groove for additional mechanical retention or adhesive seating.

Manufactured from dezincification-resistant brass (C360 / C465) using CNC turning, reaming and thread tapping or thread milling, these inserts deliver consistent thread quality, excellent corrosion resistance (when plated), and reliable pull-out & torque performance. We manufacture to strict tolerances and conduct thread GO/NO-GO, plating thickness checks and mechanical tests before dispatch.

Applications: consumer electronics, automotive interiors, furniture hardware, lighting, sensors, industrial enclosures, medical equipment housings, toys and household appliances.

Technical Specifications (standard offering)

Base part: M5 brass blind insert (closed end top)

• Internal thread: M5 0.8 mm (ISO metric), Class 6H (female)
• Major external diameter (typical): 8.0 mm (depending on series confirm with drawing)
• Overall length (L): More than 5.00mm till 60.00mm
• Knurling zone: outer diamond knurl over 14 mm (split as needed)
• Groove: Single circumferential groove width 0.8 mm, depth 0.8 mm at center of body (specifiable)
• Closed end: one side sealed (blind) material thickness 0.51.2 mm at closed face
• Material: Brass C360 (standard). Alternative: C465 (higher strength)
• Finish: Natural brass (passivated) or optional Nickel plating (510 m), Tin plating, or custom finishes
• Tolerances: OD 0.05 mm, Length 0.1 mm, Thread tolerance 6H (internal)
• Surface finish: Ra 1.6 m on turned faces (typical)
• Weight: (calculate by specific dimensions & brass density 8.48.7 g/cm)

Note: Outer diameter and minor/major thread details are customizable. Provide mating screw details (head type, length, material) for final fit assurance.

Types / Variants we supply (M5 family)

1. Blind Insert (Closed End) one end sealed. (Your requested type.)
2. Through Insert (Open both ends) for through-bolt use.
3. Flanged Insert top flange for seating and anti-pull-out.
4. Press-fit / Serrated Insert external serrations for press-in retention.
5. Ultrasonic / Heat-Set Insert geometry optimized for ultrasonic installation in thermoplastics.
6. Self-tapping External Threaded Insert specially profiled external for tapping into wood/plastic.
7. Knurled Insert diamond or straight knurl options.
8. Full-thread External external thread along outer OD for screw-in into metal housings.
9. Nickel plated / tin plated / unplated finish variants for corrosion or conductivity needs.

Typical Dimensions (example spec for M5, L=20mm) for drawing/CAD

(All in mm use to create a drawing)

• Thread (internal): M5 0.8 depth 14 mm (min 10 mm engagement)
• Outer major dia: 8.00 0.05
• Overall length L: 20.00 0.10
• Knurl start: 2.0 mm from top face; knurl length: 14.0 mm (or split)
• Groove width: 0.8 mm 0.05; groove location centered on body (at 10 mm from one end)
• Top closed end thickness: 0.91.2 mm
• Chamfer: 0.5 45 on internal entry (facilitate screw insertion)

Materials & Finishes

• Materials:
• Brass C360 (free machining, common)
• Brass C465 (recommended for higher mechanical strength)
• Alternative alloys on request (lead-free grades available)
• Finishes:
• Unplated / natural brass (clear passivation)
• Nickel plating (electroplate) typical 510 m for corrosion resistance and aesthetics
• Tin plating (for solderability)
• Black oxide / chemical finishes on request
• All plating to be followed with final thread calibration (if required) or masking of internal thread during plating

Manufacturing Process (overview)

1. Traub Turning/CNC turning of outer profile & face
2. Drill / bore for internal thread (to proper minor diameter)
3. Internal thread tapping or thread milling (M5)
4. Diamond knurling operation single or split sections per drawing
5. Groove turning with form cutter (circumferential groove)
6. Deburring, chamfering & cleaning (ultrasonic)
7. Optional plating (wrap, mask if internal threads must be preserved)
8. Final inspection & packing

Recommended Installation Methods

• Ultrasonic insertion for thermoplastics: use ultrasonic press and ensure proper depth stop and temperature control
• Heat-staking preheat insert then press into plastic cavity
• Press-fit for accurately sized holes in preformed bores; use arbor press with appropriate tooling
• Adhesive groove can hold epoxy/adhesive bead for extra retention (groove recommended for glue seat)

Mechanical Performance (typical / indicative)

(Actual values depend on host material provide sample tests if needed)

• Pull-out strength (in ABS): 150700 N (depends on hole design & installation method)
• Torque-out value (M5 screw, in ABS): typical 1.53.0 Nm before insert rotation (depends on host)
• Operating temperature: -40C to +100C (depending on host material); for plastics check thermal limits

We recommend running test parts in your exact host material and installation method before final production.

Quality Control & Tests

• Dimensional inspection: Vernier Calliper  , Micrometers OD, length, groove position
• Thread verification: GO/NO-GO gauges for internal thread (M5 GO/NO-GO)
• Knurl check: visual/fixture check for depth & pitch
• Plating thickness: XRF (for plated parts)
• Pull-out & torque testing: sample batch testing in customer representative material
• Visual & surface finish: under 10x magnification for rejects
• Batch traceability: heat/batch no., inspection checklist, packing list

Packaging & Marking (export-ready)

• Inner packaging: anti-tarnish paper bag / small plastic bag with desiccant
• Primary box: cardboard boxes with 5005000 pcs per box depending on size & quantity
• Palletization: shrink-wrapped with corner protection (for >100 boxes)
• Labeling: Product name, part no., quantity, lot no., customer PO (optional)
• Certificates included: QC checklist, thread gauge report, plating certificate (if plated), MSDS for any chemicals used

Minimum Order Quantity (MOQ), Lead Times, Pricing (guidance)

• MOQ (standard): 25,000 pcs (sample orders: 50200 pcs with sample charge)
• Lead time: sample 7-15 working days; bulk 1025 working days depending on qty & plating
• Pricing: depends on material grade, plating, tolerances and order volume. Example guidance (indicative only):
• Payment terms: Typical exporters use 60% advance + 40% on B/L copy or LC at sight for new buyers; negotiable for repeat buyers
• Incoterms: EXW, FOB (Nhava Sheva/Mundra), CIF available per buyer request

(We will provide a formal pro forma with exact pricing once you confirm quantity, finish & shipping port.)

Export Documentation & Compliance

We provide:

• Commercial invoice
• Packing list
• Bill of Lading / AWB
• Certificate of Origin (if requested)
• Inspection certificate & material test report (MTR) on request
• RoHS / REACH declaration available on request
• ISO 9001:2015 certificate (if factory certified) attach copy

For customs HS code and exact duty classification please confirm with your customs broker. (HS codes can vary by country and product description; we recommend buyer confirm exact code for import duties.)

Major Export Markets & Buyer Notes (AZ)

We commonly export to and service these markets with tailored packaging, documentation and samples:

• Europe: UK, Germany, France, Italy, Spain, Netherlands, Belgium, Poland buyers typically request RoHS, REACH & traceability. Lead times & quality emphasis are high.
• North America: USA, Canada prefer higher quality control, torque/pull-out test reports, and formal QC certificates. Common use in appliances, electronics & automotive aftermarket.
• Middle East: UAE, Saudi Arabia, Qatar, Kuwait demand robust packaging and certification for corrosion resistance. CIF/FOB shipping common.
• Asia Pacific: Japan, South Korea, Australia, New Zealand, Singapore preference for premium finishes, plating uniformity, and small-batch sampling first.
• Southeast Asia: Malaysia, Indonesia, Vietnam, Thailand competitive pricing markets with high volume opportunities.
• Latin America: Brazil, Mexico, Argentina require clear customs docs and sometimes consularization.
• Africa: South Africa, Nigeria, Kenya demand for durable packaging and clear incoterms.

For each region we can adjust:

• Packaging (humidity control)
• Certifications (RoHS / RoHS 3, REACH)
• Labelling language & palletization

Compliance & Certifications (we can provide)

• ISO 9001:2015 (Quality Management) supplier-level
• RoHS / REACH compliance statements (if parts are lead-free)
• Material Test Reports (MTR) on request
• Third-party inspection (SGS / BV / Intertek) available at buyer cost

How Buyers Can Order / Sample Policy

• Samples: 1050 pcs available; sample charge refunded on bulk order above agreed MOQ
• Customization: Provide drawing (DWG/STEP) or we can produce to your part number
• Prototype: 37 days (CNC) chargeable
• Trial order: small bulk trial order accepted with standard terms

FAQs (for TradeIndia / export buyers)

Q: Are inserts RoHS compliant?
A: Yes we can supply RoHS/REACH declarations and use lead-free brass grades and lead-free plating on request.

Q: What is the recommended hole size for M5 blind insert (press-fit)?
A: Hole size & pilot depend on host material and installation method (ultrasonic/heat/press). For plastic ultrasonic insertion typically a reamed hole slightly smaller than OD is used provide host material for precise hole recommendation.

Q: Can you supply nickel plated inserts?
A: Yes. Nickel plating 510 m is standard; other plating (tin) and passivation options available.

Q: Are you able to supply drawings and 3D models?
A: Yes 2D DWG/PDF & 3D STEP files can be provided after order confirmation or for a small sample/drawing fee.

Q: What is the packaging / MOQ?
A: MOQ standard 1,000 pcs. Samples 1050 pcs. Packaging tailored per buyer: cartons, inner polybags, desiccant.