{"product_id":"jet-jt9-730219-piston-jsg-9121-9121ns-for-jat-800a-jat-821a-replacement-part","title":"JET JT9-730219 Piston JSG-9121\/9121NS for JAT-800A, JAT-821A – Replacement Part","description":"\u003cp\u003eReplacement piston for the JET JAT-800A and JAT-821A air hammers (JSG-9121 \/ JSG-9121NS). The piston is the impact element that takes air pulse and delivers it to the chisel retainer — the part that transfers compressed air into hammer blows. OEM replacement; lubricate per the manual at reassembly so seal life and impact energy come back at spec.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eJET OEM piston for the JAT-800A and JAT-821A air hammer (JSG-9121 \/ 9121NS)\u003c\/li\u003e\n\u003cli\u003eHardened striking face — direct OEM replacement for the original impact element\u003c\/li\u003e\n\u003cli\u003eRestores BPM and impact energy to the JAT-800A \/ JAT-821A's factory specification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eShown as item 33 (Piston) in the parts diagram of the JAT-821A Manual, page 10. The photo is the boxed area of that diagram — match the item number to your machine's parts list before ordering, or call us at (888) 714-1410 with your model and serial number.\u003c\/p\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"8\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\"\u003eSpecifications\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eChina\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eJAT-800A, JAT-821A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eNinety Days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Jet Tools","offers":[{"title":"Default Title","offer_id":67646020419775,"sku":"JT9-730219","price":23.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0019\/0880\/1571\/files\/JT9-730219-diagram.png?v=1791813795","url":"https:\/\/pittsburghsprayequip.com\/products\/jet-jt9-730219-piston-jsg-9121-9121ns-for-jat-800a-jat-821a-replacement-part","provider":"Pittsburgh Spray","version":"1.0","type":"link"}