{"product_id":"6-in-x-6-in-x-2-in-granite-surface-plate-grade-b-precision-flatness","title":"6 in x 6 in x 2 in Granite Surface Plate Grade B - Precision Flatness","description":"\u003cp\u003eIn this review of the HHIP 6 x 6 x 2 in granite surface plate, the bottom line is simple: this compact plate is aimed at small shops and inspectors who need a stable, non-magnetic reference surface without the cost or logistics of a larger cast-iron table. The reviewer found the plate delivers a reliable, precision-ground top with advertised flatness and an included certificate of inspection, making it useful for layout work, setting up tools and using a height gage where tight accuracy and a small footprint matter.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision ground top:\u003c\/strong\u003e The surface is ground to a high degree of flatness so users can perform accurate layout and comparative measurements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy +\/-0001 in:\u003c\/strong\u003e The stated accuracy gives confidence when using the plate with height gages and for checking squareness and parallelism.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade B (Grade 1):\u003c\/strong\u003e This grade provides a balance of practical accuracy and affordability for many workshop and inspection tasks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFederal spec compliance and inspection certificate:\u003c\/strong\u003e The plate meets or exceeds Federal Specifications GGG-P-463C and ships with a certificate of inspection for traceability within the supplier chain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-magnetic, non-conductive:\u003c\/strong\u003e The granite surface resists magnetic interference and electrical conduction, useful around sensitive instruments and electronics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact 6 x 6 footprint:\u003c\/strong\u003e The small footprint makes it easy to position on benches and workstations for assembly, marking, and measuring tasks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis granite surface plate is best for small machine shops, toolrooms, and inspection benches that need a portable, accurate reference surface for tasks like height gage measurements, layout, and checking parallelism. It is well suited to users who value a certified plate that meets Federal Specs without requiring a large investment or heavy transport logistics.\u003c\/p\u003e\n\u003cp\u003eUsers who require NIST-traceable calibration or larger working areas should look at calibrated service options or bigger plates; likewise, very high-precision metrology labs that demand the tightest tolerance classes beyond Grade B should evaluate higher-grade plates or specialized calibration services.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGood value for a small, certified granite plate that performs basic inspection and layout duties.\u003c\/li\u003e\n\u003cli\u003eThe precision-ground top and +\/-0001 in accuracy make it practical for use with height gages and squareness checks.\u003c\/li\u003e\n\u003cli\u003eNon-magnetic and non-conductive properties reduce interference when working with sensitive tools and instruments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot NIST traceable, so labs requiring traceable calibration must obtain separate certification.\u003c\/li\u003e\n\u003cli\u003eSome users report variation in surface smoothness and flatness perception, so visual inspection on receipt is recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003e6 x 6 x 2 in Granite Surface Plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrade\u003c\/td\u003e\n\u003ctd\u003eGrade B (Grade 1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop surface\u003c\/td\u003e\n\u003ctd\u003ePrecision ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-0001 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eMeets\/exceeds Federal Specs GGG-P-463C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003eCertificate of inspection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial properties\u003c\/td\u003e\n\u003ctd\u003eNon-magnetic, non-conductive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe HHIP 6 x 6 x 2 in granite surface plate is a pragmatic choice for small shops and inspection benches that need a certified, compact reference surface. It delivers usable precision and useful features for layout and height gage work, representing solid value when NIST traceability and larger sizes are not required.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this plate NIST traceable?\u003c\/strong\u003e\u003cbr\u003eNo, the plate includes a certificate of inspection but is not NIST traceable; separate calibration is required for NIST traceability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this plate for height gage measurements?\u003c\/strong\u003e\u003cbr\u003eYes, the precision-ground top and +\/-0001 in accuracy make it suitable for height gage work and checking parallelism and squareness.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the granite surface magnetic?\u003c\/strong\u003e\u003cbr\u003eNo, the granite is non-magnetic and non-conductive, which helps around sensitive instruments.\u003c\/p\u003e","brand":"HHIP","offers":[{"title":"Default Title","offer_id":48660112146651,"sku":"B08BXMRRKC","price":49.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61rr-6guu8L._SL1500.jpg?v=1778617702","url":"https:\/\/gearmusthave.com\/products\/6-in-x-6-in-x-2-in-granite-surface-plate-grade-b-precision-flatness","provider":"GearMustHave","version":"1.0","type":"link"}