Products for bench top machinists | LittleMachineShop.com

Wrench, Spanner 38-42 mm, ER-25

Wrench, Spanner 38-42 mm, ER-25 - Main image
$6.07 $9.95 In stock

The Wrench, Spanner 38-42 mm, ER-25 is a hook spanner designed for ER-25 nuts. It fits the spindle nuts on micro mills, making it a practical accessory for bench top machining setups.

  • Spanner hook wrench for ER-25 nuts
  • Fits spindle nuts on micro mills
  • Overall length: 168 mm
  • Wrench size: 38-42 mm
  • Brand: Sieg Industrial Group
Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.6 / 5 · 5 reviews)

Julian V. ★★★★★

This spanner is exactly what I needed for adjusting the ER-25 collet nut on my micro mill, and the 38-42 mm size is spot on. The hook end grips the nut firmly without slipping, which feels reassuring during setup.

Henry L. ★★★★★

The hook end fits the ER-25 spindle nut on my micro mill perfectly, with no slipping. It’s solidly built and makes adjustments quick and easy.

Zoe I. ★★★★★

The hook engages the ER-25 nut cleanly every time, even when I'm working in the tight space around the spindle on my micro mill. For the price, it's solid enough that I don't worry about it flexing under normal torque.