{"title":"NAAMS Master Blocks","description":"\u003cp\u003eFreer Tool \u0026amp; Supply’s NAAMS master blocks collection supports accurate, repeatable locating and fixture setup for welding, assembly, and automation tooling. Master blocks are used as precision reference points (datums) for setting and verifying part location—helping fixture builders maintain consistent alignment, reduce variation, and speed up setup when tooling is installed, serviced, or transferred between stations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/www.naamsstandards.org\/Standards\/chapters\/assembly\/K.pdf\" target=\"_blank\"\u003eMaster block NAAMS\u003c\/a\u003e\u003c\/strong\u003e \u003cspan\u003eare available in fully metric sizes and are manufactured from SAE O1 oil-hardening cold-work tool steel, hardened to 50–55 Rockwell C. Each block features a black oxide finish. For complete dimensions and drawings, click the catalog links below or select the appropriate NAAMS code.\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable width=\"668\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"4\" width=\"668\"\u003e\u003ca\u003eNAAMS Master Blocks\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCatalog Page\u003c\/th\u003e\n\u003cth\u003eNAAMS Code\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003cth\u003eDimensions (mm)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4419\/3741\/files\/K-1_09dcdd71-cad7-4ff9-abd1-f3d5f7a92a17.pdf?v=1648736538\" target=\"_blank\"\u003eK-1\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eMetric Master Blocks Components Index\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4419\/3741\/files\/K-2_4ebed613-cf46-490f-b6b0-0812806afa11.pdf?v=1648736538\" target=\"_blank\"\u003eK-2\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.freertool.com\/AMB001\"\u003eAMB001\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eMetric Master Block\u003c\/td\u003e\n\u003ctd\u003e52 x 35 x 72\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4419\/3741\/files\/K-3_297e4989-536e-4fd6-b85b-267f4460cacf.pdf?v=1648736538\" target=\"_blank\"\u003eK-3\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.freertool.com\/AMB002\"\u003eAMB002\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eMetric Master Block\u003c\/td\u003e\n\u003ctd\u003e52 x 35 x 71\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4419\/3741\/files\/K-4_204d8ee4-50f7-43c0-8c6a-9d0a849946f6.pdf?v=1648736538\" target=\"_blank\"\u003eK-4\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.freertool.com\/AMB003\"\u003eAMB003\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eMetric Master Block\u003c\/td\u003e\n\u003ctd\u003e52 x 35 x 72\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4419\/3741\/files\/K-5_3118bfd1-3158-48c6-9ebe-b5a35db4f782.pdf?v=1648736538\" target=\"_blank\"\u003eK-5\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.freertool.com\/AMB004\"\u003eAMB004\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eMetric Master Block\u003c\/td\u003e\n\u003ctd\u003e52 x 35 x 71\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","products":[{"product_id":"amb002","title":"NAAMS Master Block AMB002","description":"\u003ch4\u003eShort Description\u003c\/h4\u003e\n\u003cp\u003eThe NAAMS Master Block AMB002 is engineered for precision work that demands durability. Built from SAE 01 oil-hardening cold-work tool steel and heat-treated to 50-55 R.C., this master block resists wear and maintains accuracy through countless setups. The protective black oxide finish guards against rust and corrosion in shop environments. At 62 x 35 x 52mm, it provides the compact yet substantial dimensions needed for reliable alignment and reference work. Choose Freer's NAAMS master blocks when your projects require uncompromising quality and dependable performance.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eFull Description\u003c\/h3\u003e\n\u003ch2\u003eFREER NAAMS MASTER BLOCKS AMB002\u003c\/h2\u003e\n\u003cp\u003eFull Metrics\u003c\/p\u003e\n\u003cp\u003eDimensions: 62 x 35 x 52mm\u003c\/p\u003e\n\u003cp\u003eManufactured with SAE 01 oil-hardening cold-work tool steel and hardened to 50-55 R.C\u003c\/p\u003e\n\u003cp\u003eFinish is black oxide\u003c\/p\u003e\n\u003cp\u003eAll other dimensions are shown below:\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4419\/3741\/files\/AMB002_tinypng.png\" data-lightbox=\"AMB002\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4419\/3741\/files\/AMB002_tinypng.png\" alt=\"\" width=\"80%\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Freer-NAAMS","offers":[{"title":"Default Title","offer_id":39890985812173,"sku":"FN-AMB002","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/4419\/3741\/products\/0160324_0.png?v=1629488276"},{"product_id":"amb004","title":"NAAMS Master Block AMB004","description":"\u003ch4\u003eShort Description\u003c\/h4\u003e\n\u003cp\u003eThe NAAMS Master Block AMB004 delivers precision engineering built to last. Crafted from premium SAE 01 oil-hardening cold-work tool steel and hardened to 50-55 R.C, this master block withstands demanding industrial applications with exceptional durability. Its black oxide finish provides superior corrosion resistance while maintaining a professional appearance. Measuring 62 x 35 x 52mm, it offers the exact dimensions you need for accurate setup and alignment work. Trust Freer's NAAMS master blocks for reliable performance in your most critical tooling operations.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eFull Description\u003c\/h3\u003e\n\u003ch2\u003eFREER NAAMS MASTER BLOCKS AMB004\u003c\/h2\u003e\n\u003cp\u003eFull Metrics\u003c\/p\u003e\n\u003cp\u003eDimensions: 62 x 35 x 52mm\u003c\/p\u003e\n\u003cp\u003eManufactured with SAE 01 oil-hardening cold-work tool steel and hardened to 50-55 R.C\u003c\/p\u003e\n\u003cp\u003eBlack oxide finish\u003c\/p\u003e\n\u003cp\u003eAll other dimensions are shown below:\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4419\/3741\/files\/AMB004_tinypng.png\" data-lightbox=\"AMB004\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4419\/3741\/files\/AMB004_tinypng.png\" alt=\"\" width=\"80%\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Freer-NAAMS","offers":[{"title":"Default Title","offer_id":39890985877709,"sku":"FN-AMB004","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/4419\/3741\/products\/0160326_0.png?v=1629488284"},{"product_id":"amb001","title":"NAAMS Master Block AMB001","description":"\u003ch4\u003eShort Description\u003c\/h4\u003e\n\u003cp\u003eThe NAAMS Master Block AMB001 delivers precision engineering built to last. Crafted from premium SAE 01 oil-hardening cold-work tool steel and hardened to 50-55 R.C., this master block withstands demanding industrial applications. Its protective black oxide finish resists corrosion while maintaining dimensional accuracy. Measuring 47 x 35 x 52mm, it's the reliable reference standard serious professionals depend on for consistent, repeatable results.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eFull Description\u003c\/h3\u003e\n\u003ch2\u003eFREER NAAMS MASTER BLOCKS AMB001\u003c\/h2\u003e\n\u003cp\u003eFull Metrics\u003c\/p\u003e\n\u003cp\u003eDimensions: 47 x 35 x 52mm\u003c\/p\u003e\n\u003cp\u003eSAE 01 oil-hardening cold-work tool steel and hardened to 50-55 R.C\u003c\/p\u003e\n\u003cp\u003eBlack oxide finish\u003c\/p\u003e\n\u003cp\u003eAll other dimensions are shown below:\u003c\/p\u003e\n\u003cp\u003e\u003ca data-lightbox=\"AMB001\" href=\"https:\/\/www.freertool.com\/cdn\/shop\/products\/FREER-0004718_0_0a4c3984-7e69-4623-b4cd-f833ee4e8c85_1200x1200@3x.jpg?v=1670960128\"\u003e\u003cimg width=\"80%\" alt=\"\" src=\"https:\/\/www.freertool.com\/cdn\/shop\/products\/FREER-0004718_0_0a4c3984-7e69-4623-b4cd-f833ee4e8c85_1200x1200@3x.jpg?v=1670960128\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Freer-NAAMS","offers":[{"title":"Default Title","offer_id":39892033798349,"sku":"FN-AMB001","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/4419\/3741\/products\/0160323_0.png?v=1629488272"},{"product_id":"amb003","title":"NAAMS Master Block AMB003","description":"\u003ch4\u003eShort Description\u003c\/h4\u003e\n\u003cp\u003eThe NAAMS Master Block AMB003 delivers precision and durability for demanding tooling applications. Crafted from premium SAE 01 oil-hardening cold-work tool steel, this master block withstands rigorous use while maintaining exacting tolerances. Hardened to 50-55 R.C. and finished with protective black oxide coating, it resists wear and corrosion. Measuring 47 x 35 x 52mm, it's engineered to support your most critical setup and alignment tasks with unwavering reliability.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eFull Description\u003c\/h3\u003e\n\u003ch2\u003eFREER NAAMS MASTER BLOCKS AMB003\u003c\/h2\u003e\n\u003cp\u003eFull Metrics\u003c\/p\u003e\n\u003cp\u003eDimensions: 47 x 35 x 52mm\u003c\/p\u003e\n\u003cp\u003eManufactured using SAE 01 oil-hardening cold-work tool steel\u003c\/p\u003e\n\u003cp\u003eHardened to 50-55 R.C. with a black oxide finish\u003c\/p\u003e\n\u003cp\u003eAll other dimensions are shown below:\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4419\/3741\/files\/AMB003_tinypng.png\" data-lightbox=\"AMB003\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4419\/3741\/files\/AMB003_tinypng.png\" alt=\"\" width=\"80%\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Freer-NAAMS","offers":[{"title":"Default Title","offer_id":39892033929421,"sku":"FN-AMB003","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/4419\/3741\/products\/0160325_0.png?v=1629488279"}],"url":"https:\/\/www.freertool.com\/en-ca\/collections\/naams-master-blocks.oembed","provider":"Freer Tool and Supply","version":"1.0","type":"link"}