Open End Spanner Set Manufacturer,Supplier and Exporter in India
Product Code : EL-WT-12958
Jlab Export is a leading Open End Spanner Set Manufacturer,and suppliers in India
An open end spanner slides onto a nut or bolt head from the side, so it reaches fasteners where a ring cannot be dropped over the top. This inch set has six drop-forged, chromed spanners from 1/4 x 5/16 in to 15/16 x 1 in, with a different opening at each end.
Specifications
| Spanner type | Open jaw at both ends |
| Unit | Inch |
| Sizes | 1/4 x 5/16, 3/8 x 7/16, 1/2 x 9/16, 5/8 x 11/16, 3/4 x 7/8, 15/16 x 1 in |
| Pieces | 6 spanners |
| Material | Drop forged, chromed |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 4–6 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Workshop Practice with Inch Spanners
In an ITI fitter or motor mechanic class, students first learn to size a fastener. They measure a nut across the flats with a Vernier Caliper 0-200mm, convert the reading to inches and pick the spanner that matches. A 1/2 in nut, for example, takes the 1/2 x 9/16 spanner.
A second exercise uses a nut-and-bolt assembly held in a Bench Vice. One spanner holds the bolt head while another turns the nut. The class then repeats the job with the Straight Ratchet Ring Spanner Set, which has five of the same inch sizes, and compares the two. Teachers also show why a jaw one size too big slips: it bears on the corners instead of the flats and rounds them off.
Frequently Asked Questions
What do the two figures on each spanner mean?
They are the jaw openings across the flats, in inches. The 3/8 x 7/16 spanner fits a 3/8 in hex at one end and a 7/16 in hex at the other. The figure is the size across the nut, not the thread diameter of the bolt.
Can I use these spanners on metric nuts?
Only where the sizes happen to be close. Most inch and metric sizes differ enough for the jaw to sit loose and round the corners. For millimetre fasteners, use the metric Open End Spanner Set, which runs from 6 x 7 mm to 30 x 32 mm.
When is an open end spanner the better choice over a ring?
Use the open end where the fastener can only be reached from the side, such as a nut on a pipe. For breaking a tight nut loose, a ring holds all round and is less likely to slip.
How should the spanner be pulled?
Seat the jaw fully on the flats and pull the handle towards you rather than pushing it, so your knuckles stay clear if it slips. Never lengthen the handle with a pipe or strike it with a hammer.
Other Spanners for Nuts and Bolts
- Combination Spanner Set (nine inch spanners, ring and open end)
- Box End Spanner Set (metric ring spanners)
- Open Spanner (single open spanners in metric sizes)
For a quote, use Add To Cart or send us a message through the contact page.
Last updated: 6 November 2026
