Williams 800NMIMHW Interchangeable Head Torque Wrench Body, Z-Shank (129-572 ft-lb)

Description

The Williams 800NMIMHW is a micrometer-adjustable interchangeable-head torque wrench body — the handle and calibrated mechanism that Williams’ full range of Z-shank heads (open-end, box-end, flare-nut, and square-drive, in SAE and metric sizes) attach to. A locking pin gives quick head changes without affecting the calibrated torque setting, so one body plus a set of heads covers a wide range of fastener sizes and styles.

Range: 129-572 ft-lb (150-800 Nm). Accuracy is ±3% of indicated value from 20-100% of full scale, meeting or exceeding ASME B107.300 and ISO 6789. Individually serialized with a NIST-traceable certificate of calibration. Note that Z-shank heads (particularly Y-shank) are structurally capped at their own maximum torque rating regardless of this body’s range — check the specific head’s rating before pairing it with this body at the top of its scale.

This is the body only; select compatible Z-shank heads separately to complete your interchangeable-head wrench setup.

**Frequently asked questions**

**Do the heads come with the wrench body?** No — this is the adjustable wrench body only. Heads (open-end, box-end, flare-nut, or square-drive, in SAE or metric sizes) are sold separately and matched to this body by shank type.

**How do I know which head shank fits this body?** Match the shank letter (J/Y/X/Z) exactly — a J-shank body only accepts J-shank heads, and so on. We can help confirm compatible head part numbers for your size range.

**Why choose this over a fixed-head wrench?** One adjustable body plus a set of interchangeable heads covers many fastener sizes and styles (open-end, box-end, flare-nut) without buying a separate torque wrench for each.