Description
72905040 ER40 Spring Collet 4mm — BOLTON SKU 65472.
Supplied by BOLTON Technical Equipment Supplies against request for quotation. BOLTON sources technical equipment and components for defence, aerospace, UAV/UAS, MRO and industrial programmes across the UAE, Saudi Arabia and Australia.
Add this item to your RFQ basket to request pricing, lead time and documentation requirements (e.g. CoC, datasheets or test reports where applicable to your order).
Within the 729050 block the closing digits track nominal bore, making this the 4 mm member of the ER40 set. ER collets are slit sleeves that close concentrically on the shank as the collet nut is tightened.





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