PANEL NUTS OF BRASS
Brass Panel Nuts for Panel-Mounted Electrical Components and Enclosure Fastening
Cable Glands India manufactures brass panel nuts machined from free-cutting and DZR brass bar for securing panel-mount components – indicator lamps, push buttons, connectors, potentiometers, terminal studs, meters and cable glands – through a cutout in an enclosure or control panel. Panel nuts are supplied in hex, knurled-round and flanged profiles, matched to metric, UNF and manufacturer-specific panel-mount threads. Price: US$ 14.50/kilogram (FOB/CIF Indian port, ex-works Mumbai, price subject to size, thread and finish).
Product Overview
A brass panel nut is a thin-profile nut used on the rear side of a panel or enclosure wall to retain a component whose body or bushing passes through a drilled or punched cutout from the front. Typical components fastened with panel nuts include indicator lights, selector switches, push-buttons, panel-mount connectors, potentiometers, toggle switches, meters and cable gland bodies, all of which rely on a single nut (or nut-and-washer pair) tightened from behind the panel to hold the component square and sealed against the mounting surface.
Cable Glands India supplies panel nuts in three main profiles: standard hexagon panel nuts for use with a spanner from behind the panel; knurled round panel nuts that allow hand-tightening in confined enclosures where spanner access is restricted; and flanged panel nuts with an enlarged bearing face that spreads clamp load over a wider area, reducing the risk of cracking thin sheet-metal or plastic panels during tightening.
Thread forms are matched to the panel-mount component being secured, most commonly metric (M9, M12, M16, M22 for switches and indicators), UNF threads for imported connectors and instruments, and gland-specific metric/PG/NPT threads where the panel nut is used as the retaining nut for a cable gland body.
Because panel nuts are frequently the only visible fastener on the front of a control panel, dimensional consistency and surface finish are held to tight tolerance, ensuring a flush, professional appearance across all mounting points on switchgear, control desks and instrument panels supplied to EPC contractors and OEM panel builders.
Standard free-cutting brass (CuZn39Pb3) panel nuts are used for indoor control panels, HMI enclosures and switchgear. DZR brass (CW602N/CZ132) panel nuts are recommended for outdoor control kiosks, marine control stations and coastal substation panels where long-term exposure to humidity and salt-laden air would otherwise risk dezincification of the thread and bearing face.
Surface finishes include plain brass, bright nickel plating and black nickel/oxide finishes to match the aesthetic of indicator bezels, switch collars and instrument fascia commonly specified on modern control panels.
All panel nuts are thread-gauged and dimensionally inspected before dispatch, and can be supplied pre-assembled with matching sealing washers where the panel nut forms part of an IP-rated panel penetration.
Key Features
- Hex, knurled-round and flanged profiles for varying access and load conditions
- Metric, UNF and gland-matched thread series
- Machined from free-cutting and DZR brass bar stock
- Flanged variants distribute clamp load to protect thin panel material
- Plain, bright nickel and black finish options for panel aesthetics
- 100% thread-gauged and dimensionally inspected before dispatch
- Available pre-assembled with sealing washers for IP-rated penetrations
- Custom thread, knurl and flange dimensions to customer drawing
Panel Mounting and Component Retention
Panel nuts are the standard method of retaining front-panel components such as indicator lamps, selector switches, push-buttons and potentiometers, which pass a threaded bushing through the panel cutout from the front and are secured by the panel nut tightened from the rear. Correct nut engagement depth and torque are essential to hold the component square to the panel face and prevent loosening from repeated operator actuation.
Knurled Round Panel Nuts for Confined Access
Where spanner access behind the panel is restricted, such as in deep or densely populated enclosures, knurled round panel nuts allow hand-tightening without tooling, while still providing adequate clamp force for lightweight components such as indicator lamps and small connectors.
Flanged Panel Nuts for Thin Sheet Metal
Flanged panel nuts incorporate an enlarged bearing face that spreads the clamping load over a larger area of the panel surface, reducing point-loading that can crack or deform thin sheet-metal or polycarbonate enclosure panels during tightening, particularly relevant for lightweight portable and HMI enclosures.
Material Selection for Outdoor Panels
Standard CuZn39Pb3 brass panel nuts are suitable for indoor switchgear and control panels. DZR brass (CW602N/CZ132) is recommended for outdoor control kiosks, marine control stations and coastal substations, protecting the panel nut thread and bearing face from dezincification corrosion under prolonged humidity or salt exposure.
Sealing and IP-Rated Panel Penetrations
Where a panel nut forms part of an IP-rated cable or component entry, it is supplied together with a matched sealing washer to compress against the panel surface, contributing to the overall ingress protection rating of the enclosure penetration.
Custom Thread and Component Matching
Cable Glands India manufactures panel nuts to match specific component thread designations supplied by the customer, including legacy or imported switch, connector and instrument threads no longer readily available from standard fastener catalogues.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product type | Hex panel nut, knurled round panel nut, flanged panel nut |
| Thread size range | M6 to M40 metric; UNF #6-32 to 1″-20; gland-matched PG/NPT sizes |
| Governing reference | ISO 8675 (hex thin nuts), component-specific OEM drawing |
| Thread tolerance class | 6H (internal) as standard |
| Material | CuZn39Pb3, CuZn36Pb3, CW602N/CZ132 (DZR) |
| Manufacturing process | CNC bar turning + tapping + knurling/flanging |
| Standard finish | Plain brass (natural) |
| Optional finish | Bright nickel plating, black nickel/oxide finish |
| Sealing option | Pre-assembled with EPDM/rubber sealing washer |
| Inspection | Thread gauging (go/no-go), dimensional check, visual surface inspection |
| Packing | Bulk cartons, poly bags; export wooden pallets |
| Price | US$ 14.50/kilogram (FOB/CIF Indian port, MOQ and finish dependent) |
Raw Material Grades
| Grade / UNS | Common Name | Cu % | Zn % | Pb % | Typical Use |
|---|---|---|---|---|---|
| C38500 / CW614N | Free-cutting brass | 57-59 | Bal. | 1.5-2.5 | General purpose panel nuts |
| C36000 | Free-cutting brass | 60-63 | Bal. | 2.5-3.7 | High-speed screw machine nuts |
| CW602N / CZ132 | DZR brass | 58-64 | Bal. | 1.6-2.5 (+As) | Outdoor kiosks, marine control panels |
| C27200 / CuZn37 | Yellow brass | 63-68.5 | Bal. | <0.3 | Cold-formed knurled/flanged nuts |
International Equivalent Standards
| Region / Country | Standard / Reference | Description |
|---|---|---|
| International (ISO) | ISO 8675 | Hexagon thin nuts, fine pitch thread, chamfered |
| Germany (DIN) | DIN 546 / DIN 1804 | Round knurled nuts / slotted round nuts |
| USA (NEMA/UL) | UL 508A reference | Panel-mount component fastening in industrial control panels |
| India (BIS) | IS 10238 (reference) | Hexagon thin nuts, metric series |
| OEM specific | Manufacturer drawing | Switch/connector/instrument-specific panel nut thread |
Product Types / Variants
| Variant | Description |
|---|---|
| Hex panel nuts | Standard hexagon profile for spanner tightening behind panel |
| Knurled round panel nuts | Hand-tightening profile for confined enclosure access |
| Flanged panel nuts | Enlarged bearing face to protect thin sheet-metal panels |
| Sealed panel nuts | Supplied with sealing washer for IP-rated penetrations |
| DZR panel nuts | Dezincification-resistant for outdoor/marine control panels |
| Custom panel nuts | Component-matched threads to OEM drawing |
Applications in Industry
Brass panel nuts manufactured by Cable Glands India are used for: retaining indicator lamps, push-buttons and selector switches on control panel fascia; securing panel-mount connectors, potentiometers and instruments; fastening cable gland bodies through enclosure walls; mounting meters and pilot devices on switchgear and control desks; and general OEM panel-building applications requiring a corrosion-resistant, non-magnetic panel fastener. EPC contractors, panel builders and instrumentation OEMs specify brass panel nuts wherever a flush, reliable and corrosion-resistant fixing is required on visible control panel surfaces.
Manufacturing Process
| Step | Process Description |
|---|---|
| 1. Raw material selection | Certified brass bar procured against mill test certificate |
| 2. Forming | CNC bar turning to hex, round or flanged blank with pre-drilled bore |
| 3. Tapping | Internal thread tapping to component-matched pitch and tolerance |
| 4. Knurling / flanging | Knurl rolling or flange forming as per variant specification |
| 5. Facing and deburring | Face flat, chamfer and vibratory deburr to remove machining burrs |
| 6. Surface finishing | Plain polish, bright nickel or black nickel/oxide finish as ordered |
| 7. Inspection | Thread gauging, dimensional and visual inspection |
| 8. Packing and dispatch | Bulk carton packing, export documentation, mill certificates issued |
Quality Standards and Certifications
Cable Glands India manufactures brass panel nuts under an ISO 9001 certified quality management system, referencing ISO 8675, DIN 546/1804 and customer OEM drawings as applicable. Raw brass is sourced against mill test certificates confirming chemical composition. RoHS and REACH compliance documentation is available for plated finishes on request. Salt-spray corrosion testing (ASTM B117) can be arranged for DZR and plated batches destined for outdoor or marine control panel projects. Please confirm the certification package required for your project at the time of enquiry.
Why Choose Cable Glands India
- Panel nuts engineered to match specific switch, connector and gland threads
- Hex, knurled and flanged profiles manufactured in-house
- Standard and DZR brass grades for indoor and outdoor control panels
- Pre-assembly with sealing washers available for IP-rated penetrations
- Export packing and documentation for direct container/LCL shipment
- Transparent per-kilogram pricing with no hidden tooling charges on standard sizes
Frequently Asked Questions
What is a brass panel nut used for?
A brass panel nut secures a panel-mounted component, such as an indicator lamp, switch, connector or cable gland, by tightening onto the component’s threaded bushing from behind the panel or enclosure wall.
What is the difference between a panel nut and a lock nut?
A panel nut is primarily selected for its thread match to a panel-mount component and its bearing/knurl profile for tightening access, while a lock nut is primarily selected for its vibration-resistant locking function; the same physical nut can sometimes serve both roles.
Can panel nuts be supplied to match my specific component thread?
Yes. Cable Glands India manufactures panel nuts to match customer-supplied component drawings or samples, including legacy and imported switch, connector and instrument threads.
Are brass panel nuts suitable for outdoor control panels?
Standard brass performs well indoors; for outdoor kiosks, marine control stations and coastal substations, DZR brass grade is recommended to prevent dezincification corrosion.
What is a flanged panel nut?
A flanged panel nut has an enlarged bearing face that spreads clamping load over a wider area of the panel, reducing the risk of cracking thin sheet-metal or plastic enclosure panels during tightening.
Can panel nuts be supplied with a sealing washer?
Yes, panel nuts can be supplied pre-assembled with a matched sealing washer where the nut forms part of an IP-rated panel penetration.
What finishes are available?
Plain brass, bright nickel plating and black nickel/oxide finish are available to match indicator bezels, switch collars and instrument fascia on the control panel.
What certifications are provided?
Mill test certificates are issued as standard. ISO 9001 manufacturing compliance, RoHS/REACH documentation and salt-spray test reports can be provided on request.
What is the minimum order quantity?
Standard catalogue sizes are available from small trial quantities; custom threads or profiles may carry a minimum order quantity depending on tooling requirements.
What is the price of brass panel nuts?
Standard pricing is US$ 14.50 per kilogram (FOB/CIF Indian port), varying with size, brass grade, finish and order quantity.
Equivalent Terms in Other Languages
| Language | Brass Panel Nut | Related Term 1 | Related Term 2 | Related Term 3 |
|---|---|---|---|---|
| Spanish | Tuerca de panel de latón | Tuerca de montaje en panel | Tuerca moleteada de latón | Tuerca embridada de latón |
| Russian | Латунная панельная гайка | Гайка для монтажа на панель | Латунная гайка с накаткой | Латунная фланцевая гайка |
| French | Écrou de panneau en laiton | Écrou de montage panneau | Écrou moleté en laiton | Écrou à embase en laiton |
| Portuguese | Porca de painel de latão | Porca de montagem em painel | Porca serrilhada de latão | Porca flangeada de latão |
| Italian | Dado da pannello in ottone | Dado di montaggio a pannello | Dado zigrinato in ottone | Dado flangiato in ottone |
Related Products and Linked Parts
- Brass Hex Nuts Full Nuts
- Brass Lock Nuts
- Brass Square Nuts
- Brass Flat Head CSK Head Machine Screws
- Brass Washers, Pressed Washers
- Brass Bolts
- Brass Cable Glands
- Brass Fasteners (Category)
Request a Quote
Cable Glands India supplies brass panel nuts worldwide to electrical OEMs, EPC contractors, power utilities and distributors, at US$ 14.50/kilogram (FOB/CIF Indian port). Send your component drawing, thread size, grade and quantity requirement to sales@cableglandsindia.com or call +91 22 4344 9300 for a formal quotation and sample dispatch.