Brass Panel Nuts

Brass Panel Nuts

Electrical Accessories India manufactures a comprehensive range of brass panel nuts for electrical panel construction, cable gland assemblies, control cabinets, switchgear, and instrumentation enclosures. Panel nuts—also called thin nuts, jam nuts, or low-profile nuts—are engineered for applications where standard full-height nuts are too bulky, or where two nuts must be locked together (jam-nut configuration). The brass construction offers corrosion resistance, non-magnetic properties, and compatibility with brass cable glands, copper busbars, and aluminium panel sheets, making these nuts a critical component in electrical OEM assemblies.

Product Overview

Brass Hex Panel Nuts (Thin Hex Nuts / Jam Nuts)

Brass hex panel nuts conform to DIN 439 (ISO 4035) for metric thin hex nuts. Available in property class 04 (brass – non-hardened) in M3 through M36. These nuts feature a reduced height (approximately 40–60% of standard hex nut height) compared to DIN 934 full-height nuts, enabling use in thin sheet metal panels, cable gland backing plates, terminal strip assemblies, selector switch mounting panels, pushbutton backing nuts, and multi-stack nut configurations. The AF dimensions match standard wrenching tooling for M3–M36. Surface finishes: bare brass, nickel plated, tin plated.

Brass Knurled Panel Nuts (Thumb Nuts)

Knurled brass panel nuts feature a knurled cylindrical body allowing hand-tightening without tools—widely used in removable panel covers, hinged door earthing clamps, PCB removal handles, relay extraction aids, test terminal covers, instrument front panel adjustment screws, and service-access fasteners in control cabinets. Knurl patterns: straight knurl, diamond knurl, and coarse milled (per DIN 466 / DIN 467). Available M3 to M16 metric and 1/4″ to 1/2″ inch series. Body height options: low (flush with panel), standard (DIN 466), and tall (deep-knurl for secure grip).

Cable Gland Locknut (Brass Panel Nut for PG and Metric Cable Glands)

A significant volume application for brass panel nuts is as cable gland locknuts. These thin hex or hexagonal-shoulder nuts are used to clamp cable glands, PG thread adaptors, conduit fittings, and liquid-tight connectors into electrical panel knockouts. Available in PG thread (PG7, PG9, PG11, PG13.5, PG16, PG21, PG29, PG36, PG48), metric thread (M12×1.5, M16×1.5, M20×1.5, M25×1.5, M32×1.5, M40×1.5, M50×1.5, M63×2.0), and NPT/BSP thread. Hex AF dimensions are designed to match standard cable gland installation spanners used by panel builders globally.

Hexagonal Coupling Nuts (Long Nuts / Extension Nuts)

Brass hexagonal coupling nuts (DIN 6334) are used to join two threaded rods or extend bolt reach in panel earthing stud extensions, busbar stud extensions, terminal post extensions, relay mounting extensions, and multi-layer panel assembly. Available M3 to M20 in standard DIN 6334 proportions (length ≈ 3 × diameter). Custom length coupling nuts to specific panel depth requirements are also produced.

Brass Dome Nuts (Acorn Nuts / Cap Nuts)

Brass dome nuts (DIN 1587 / ISO 4161) provide a finished closed-end appearance while protecting the exposed bolt thread end from damage, contamination, and contact hazard. Used in electrical panel aesthetics, outdoor signage earthing posts, consumer product assembly, and safety-critical exposed stud locations. Available M3 to M20. Optional nickel or chrome plating for decorative applications.

Square Nuts and T-Nuts in Brass

Brass square nuts (DIN 562 / DIN 557) are used in DIN rail slot-mounting of brackets and channel assemblies. Brass T-nuts (hammer-in) are used in PCB chassis, aluminium extrusion panels, and instrument housing assemblies where a blind-tapped captive nut is needed. Available M3 to M12. Weld nuts, flange nuts, and captive nuts in brass are also produced to drawing.

Nylon Insert Self-Locking Brass Nuts (Nylock)

Brass nylon-insert locknuts (DIN 985 / ISO 7042) combine the corrosion resistance of brass with the prevailing torque of a nylon insert for vibration-resistant panel assembly. Used in motor control centre (MCC) component mounting, vehicle panel assemblies, marine electrical panels, and any panel subject to vibration or cyclic thermal expansion. Available M3 to M16. The nylon insert maintains locking torque through 5–10 re-use cycles per ISO 2320.

Pricing and Availability

Brass panel nuts are priced at USD 13.50 per kilogram (EXW Jamnagar, India). Bulk packing in polybags, counted cartons, or custom packaging for production-line supply. MOQ: 10 kg per size/type. Stock items: M3–M24 DIN 439 thin hex nuts and PG7–PG48 cable gland locknuts available from inventory for short-notice delivery.

Key Features

• Free-cutting brass CZ121 / CW614N – corrosion resistant, non-magnetic
• Panel nut types: thin hex (DIN 439), knurled (DIN 466/467), dome (DIN 1587), coupling (DIN 6334), square, T-nut, nylock
• Cable gland locknuts: PG7–PG48, metric M12×1.5–M63×2.0, BSP/NPT
• M3–M36 metric and 1/4″–1-1/2″ inch series
• Surface options: bare brass, nickel, tin, chrome plated
• ISO 9001:2015 manufactured; EN 10204 3.1 MTR available

Thin Profile for Space-Constrained Panel Assembly

Brass thin panel nuts (DIN 439 profile) with reduced height from 1.8 mm (M3) to 9.5 mm (M24) allow compact multi-layer assembly in high-density electrical panels where standard full-height (DIN 934) nuts would protrude beyond the panel edge. This is critical in high-packing-density MCC cubicles, modular substation control panels, railway relay racks, and compact telecom equipment bays.

Compatibility with Cable Gland Systems

Brass panel locknuts for cable glands are dimensionally coordinated with the cable gland product range from major OEMs (Hawke, CMP, Jacob, Pflitsch, Hummel, Wiska, MCT Brattberg). Thread dimensions, thread tolerance (6H), and AF dimensions are machined to interfit with PG-thread, metric-thread, and NPT-thread cable glands. For IP65/IP66 rated panel penetrations, a sealing washer (neoprene, EPDM, or silicone) is typically assembled with the locknut.

Brass Flange Nuts for Panel Applications

Brass flange nuts (DIN 6923) combine a hex nut with an integrated bearing flange and serrations for self-locking and large bearing area. Used in sheet metal panel assembly where high pull-through resistance is required, particularly for light-gauge aluminium and steel panels. The serrated flange bites into the panel surface to provide electrical bonding continuity across the panel joint. Available M4 to M20. Non-serrated versions available for applications requiring clean surface contact.

Technical Specifications

Brass Material Grades – International Equivalents

Product Variants

Applications in Industry

Manufacturing Process

Brass panel nuts are produced by automatic cold forging (nut forming) from brass rod or wire for M3–M16 sizes, and by hot forging + CNC machining for M20–M36 sizes. In cold forging, brass rod is cut to billet and progressively formed through multi-die headers to produce the hexagonal profile with controlled concentricity and face parallelism. Tapping follows on automatic nut tapping machines using spiral-fluted taps for clean thread formation in brass. For knurled thumb nuts, the knurl pattern is rolled or milled during the turning operation on CNC lathes. Cable gland locknuts are machined from hexagonal brass bar to achieve precise PG or metric thread dimensions. All nuts are gauged with calibrated GO/NO-GO thread gauges and dimensional inspection per ISO 3269 / DIN 267.

Quality Standards and Certifications

Why Choose Electrical Accessories India

• Widest panel nut range – thin hex, knurled, dome, flange, coupling, cable gland locknuts from single source
• Cable gland locknut specialist – PG7 to PG48, M12 to M63 metric, BSP/NPT in stock
• ISO 9001:2015 certified with batch traceability and AQL inspection
• USD 13.50/kg – competitive OEM pricing with volume discount
• Custom manufacturing – special thickness, non-standard thread, plated finishes to order
• Export ready – EN 10204 3.1 MTR, REACH/RoHS declarations, Certificate of Origin

Frequently Asked Questions (FAQ)

1. What is the difference between DIN 439 and DIN 934 brass nuts?

DIN 439 is a thin hex nut (jam nut) with approximately 55% of the height of a DIN 934 standard hex nut. DIN 439 thin nuts are used in panel assembly, cable gland locking, and jam-nut configurations where space is limited. DIN 934 is the standard hex nut used for general bolted joint applications.

2. Which brass panel nut is used for metric cable glands?

For metric cable glands (M12×1.5 through M63×2.0), a thin hex locknut machined to the corresponding metric fine thread pitch is used. These are often called cable gland locknuts or conduit locknuts. We supply these in metric fine, PG, and NPT/BSP thread forms.

3. Are knurled panel nuts available with left-hand thread?

Yes, left-hand thread knurled nuts can be manufactured to order. Common applications include differential screw assemblies, meter couplings, and specific industrial equipment. Minimum order: 25 kg.

4. What torque should be applied to M20 cable gland brass locknut?

Recommended installation torque for M20×1.5 brass cable gland locknut: 15–20 Nm (hand tighten + 1/4 turn with spanner). Over-tightening can crack thin panel sheets; use a torque wrench for aluminium panels below 2 mm thickness.

5. Do you supply brass panel nuts for Roxtec or MCT transit frames?

Yes, we supply metric hex nuts and dome nuts compatible with Roxtec, MCT Brattberg, and similar cable transit frame fastener requirements. Please supply the thread specification and required quantity for quotation.

6. Can brass panel nuts be used in stainless steel panel boards?

Yes. Brass-to-stainless steel contact is acceptable in low-moisture, indoor environments. For wet or outdoor environments, the galvanic potential difference (≈0.3V) can cause minor corrosion of the brass nut; in such cases, use A2/A4 stainless steel nuts or isolate with a PTFE washer.

7. What is the minimum thread engagement required for brass panel nuts?

A minimum of 1 × nominal diameter thread engagement (e.g., 10 mm for M10) is recommended for adequate strip-out resistance in brass. For thin panel applications where engagement is limited to 0.5 × diameter, use a higher-strength alloy (silicon bronze or stainless steel) nut.

8. Do you offer 100% thread inspection of cable gland locknuts?

Yes, for critical OEM supply programmes, 100% GO/NO-GO thread gauging of all cable gland locknuts is available. AQL 1.0 inspection is standard; 100% inspection is offered at a premium for high-value projects requiring zero-defect delivery.

Equivalent Terms and Multilingual Reference

Related Products and Linked Terms

• Brass Machine Screws
• Brass DIN 934 Hex Nuts
• Copper Bolts & Hex Set Screws
• Silicon Bronze Hex Nuts
• Silicon Bronze Flanged Nuts
• Brass Standoffs
• Brass Spacers
• Cable gland locknuts, conduit locknuts, PG nuts, DIN rail T-nuts, brass washers, brass spring washers

Request a Quote

Electrical Accessories India supplies brass panel nuts, cable gland locknuts, and specialist electrical fasteners to panel builders, OEMs, EPC contractors, and distributors worldwide. Pricing: USD 13.50 per kilogram (EXW Jamnagar, India). Contact us for bulk pricing, sample requests, and custom specifications.

Email: info@elecaccs.com | Location: Jamnagar, Gujarat, India

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