HEX Tinned Copper Tubular Cable Lugs Without Inspection Hole – 2.5 to 630 sq mm

HEX tinned copper tubular cable lugs without inspection hole (HNL) have a closed barrel. With no hole in the barrel, moisture and contamination cannot reach the crimped conductor — the reason to choose them for outdoor, damp and corrosive locations. They are E-copper, electro-tinned, from 2.5 to 630 sq mm. Made by HEX, the brand of Brass Copper & Alloy (I) Ltd., Mumbai — an ISO 9001 company whose products are tested by CPRI (India), UL (USA), KEMA (Netherlands) and SIRIM (Malaysia).

At a glance

• Range: 2.5 to 630 sq mm
• Stud holes: 5.3 to 21 mm; blank palm on 500 and 630 sq mm
• Barrel: closed, no inspection hole
• Four-hole: HNL 630-4 E10 (630 sq mm)
• Tolerance: ± 3%
• Material: E-copper (electrolytic copper), minimum 97% IACS conductivity to IS 191
• Finish: electro-tinned to IS 1359

Why a lug without inspection hole

• Keeps moisture out of the crimped joint.
• Better for outdoor, coastal and damp areas.
• Wide range from 2.5 to 630 sq mm.
• Four-hole version for 630 sq mm.

Specifications

• 2.5 and 4 sq mm: stud 5.3 mm
• 6 and 10 sq mm: stud 5.3, 6.5, 8.5, 10.5, 13 mm
• 16 sq mm: stud 5.3, 6.5, 8.5, 10.5, 13 mm
• 25 sq mm: stud 5.3, 6.5, 8.5, 10.5, 13, 15 mm
• 35 and 50 sq mm: stud 6.5, 8.5, 10.5, 13, 15 mm
• 70 sq mm: stud 6.5, 8.5, 10.5, 13, 15 mm
• 95 and 120 sq mm: stud 8.5, 10.5, 13, 15, 17, 21 mm
• 150 sq mm: stud 8.5, 10.5, 13, 15, 17, 21 mm
• 185 sq mm: stud 10.5, 13, 15, 17, 21 mm
• 240 sq mm: stud 10.5, 13, 15, 17 mm
• 300 sq mm: stud 13, 15, 17, 21 mm
• 400 sq mm: stud 17, 21 mm
• 500 sq mm: stud 17, 21 mm or blank
• 630 sq mm: stud 17, 21 mm, blank, or four-hole (HNL 630-4 E10)
• Codes: HNL <sq mm>-<stud>, e.g. HNL 95-10
• Material: E-copper (electrolytic copper), minimum 97% IACS conductivity to IS 191
• Finish: electro-tinned to IS 1359

Where it is used

• Outdoor switchyards and kiosks
• Coastal and humid sites
• Pump houses and water-treatment plants
• Solar field junction boxes

Which HEX copper lug do I need?

• Standard UL-listed tubular lugs — the general-purpose copper lug, 1.5–1000 mm², with inspection hole.
• Economy range — the same job for 35–1000 mm² where a lighter lug is acceptable.
• Bell mouth — flared entry for fast insertion of flexible or fine-stranded conductors.
• Without inspection hole (this page) — sealed barrel for damp or outdoor locations.
• Long barrel, 2-hole or 4-hole — longer crimp or anti-rotation palm for heavy terminations.
• 33 kV terminals — for HV cable terminations.

Related products

• HEX 33 kV copper terminals (no inspection hole)
• HEX UL-listed tubular lugs
• HEX copper crimping connectors

Frequently asked questions

Why choose a lug without an inspection hole?

Because a closed barrel stops moisture entering the crimped joint — better for outdoor or damp locations.

Which sizes are available?

2.5 to 630 sq mm, with stud holes from 5.3 to 21 mm, blank palms on 500 and 630 sq mm and a four-hole 630 sq mm version.

How do I know the conductor is fully inserted?

Measure the barrel depth and mark the stripped conductor before inserting it.

How should the lug be crimped?

Use a crimping tool and die matched to the cable size, and crimp from the palm end towards the barrel end.

Where can I buy HEX cable lugs in India?

From Jai Enterprises, which supplies HEX cable lugs, terminals and connectors across India from Bhilai and Raipur, Chhattisgarh. Call +91 9340081159 with the product codes or cable sizes and quantities.

How to order

Supplied by Jai Enterprises, despatched from Bhilai and Raipur, Chhattisgarh, to sites across India. To request a price, call +91 9340081159 or send an enquiry from this page with your quantity and site details, and we will confirm availability, lead time and the right model for the job.