Quick view Bell & Gossett | sku: P2004391 B&G Jam Nut Kit P2004391 for Series e-90 Bell & Gossett Jam Nut Kit – Part No. P2004391 Genuine Bell & Gossett replacement jam nut kit, B&G part number P2004391, for Series e-90 pumps. This is the part shown as item 3 on B&G parts list... View Details Compare