- Generally Conforming to IS 3082-1988
- Black Allen keys are made from Chrome Vanadium Steel which withstand upto 30% higher torque as compared to Allen keys made Carbon Steel.
- TAPARIA Black Allen Keys are scientifically hardened to 52 to 56 HRC. Other makes Allen keys are usually offered with hardness in the range of 48 to 52 HRC.
- As a result of higher hardness offered in case of TAPARIA Black Allen keys along with superior steel properties the wear resistance and life is more of TAPARIA Allen keys.
- Allen keys are precision drawn for perfect matching of Allen keys with screw head.
| PRODUCT NO. | L1 | L2 | WT. GMS |
| K1/16 | 44 | 14 | 1 |
| K5/64 | 48 | 15 | 2 |
| K3/32 | 51 | 17 | 3 |
| K1/8 | 57 | 19 | 5 |
| K5/32 | 64 | 21 | 9 |
| K3/16 | 70 | 24 | 14 |
| K7/32 | 75 | 26 | 23 |
| K1/4 | 83 | 28 | 28 |
| K5/16 | 83 | 28 | 28 |
| K3/8 | 108 | 35 | 92 |
| AK-1/2 | 125 | 45 | 185 |
| AK-9/16 | 140 | 56 | 275 |
| AK-5/8 | 160 | 63 | 385 |
| AK-3/4 | 180 | 70 | 625 |
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