--- product_id: 72690199 title: "Shars Grade 0 Rectangular Gage Block Set with NIST traceable Certificate 81 PCS 303-5307C M)" brand: "shars" price: "£317.82" currency: GBP in_stock: true url: https://www.desertcart.co.uk/products/72690199-shars-grade-0-rectangular-gage-block-set-with-nist-traceable store_origin: GB region: United Kingdom --- # ±0.000006" accuracy NIST-traceable certification 65 RC hardened steel Shars Grade 0 Rectangular Gage Block Set with NIST traceable Certificate 81 PCS 303-5307C M) **Brand:** shars **Price:** £317.82 **Availability:** ✅ In Stock ## Summary > 📏 Elevate your precision game with the ultimate gage block set! ## Quick Answers - **What is this?** Shars Grade 0 Rectangular Gage Block Set with NIST traceable Certificate 81 PCS 303-5307C M) by shars - **How much does it cost?** £317.82 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/72690199-shars-grade-0-rectangular-gage-block-set-with-nist-traceable) ## Best For - shars enthusiasts ## Why This Product - Trusted shars brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Crafted from seasoned alloy tool steel hardened to 65 RC for unmatched wear and rust resistance. - • **Precision Perfected:** Achieve ultra-fine measurements with ±6 millionth inch accuracy under standard conditions. - • **Certified Confidence:** Includes NIST-traceable calibration certificate for guaranteed measurement reliability. - • **Complete 81-Piece Set:** Comprehensive range of rectangular gage blocks to cover all your precision needs. - • **Mirror-Finish Mastery:** Micro-lapped surfaces ensure flawless wringing and consistent stacking every time. ## Overview The Shars Grade 0 Rectangular Gage Block Set (81 PCS) offers industry-leading ±6 millionth inch accuracy, crafted from hardened alloy tool steel (65 RC) with mirror-finished surfaces for perfect wringing. Calibrated and certified traceable to NIST standards, this set ensures reliable, wear-resistant precision measurement for professional environments. ## Description Shars Grade 0 Rectangular Gage Block Set with NIST traceable Certificate 81 PCS 303-5307C M) ## Features - Part# 303-5307C - Our gage blocks are manufactured under carefully controlled conditions and inspected by the ASME B89.1.9-2002 standard, allowing for an accuracy of +/- 6 millionth for size under 1" block when used at room temperatures of 68 degrees Fahrenheit (or 20 degrees Celsius). - The gage blocks are made of fully seasoned alloy tool steel with hardened to 65 RC to provide resistance to wear, abrasion, and rust. - The measuring surface of the gage block are ground and micro-lapped to a mirror finished so the gage block can be wringable. - Calibration certificate traceable to the N.I.S.T. ## Images ![Shars Grade 0 Rectangular Gage Block Set with NIST traceable Certificate 81 PCS 303-5307C M) - Image 1](https://m.media-amazon.com/images/I/91eKVeaLesL.jpg) ## Available Options This product comes in different **Size, Number of Items** options. ## Questions & Answers **Q: description says .00005" accuracy. That is not gade 3. Are we missing a zero?** A: The correct tolerance is: +/- 0.000050 **Q: Are they individually serialized and certified?** A: The blocks are certified individually, there is a deviation given in microinches for each block, thus the set could be used as a master set to calibrate other gage blocks. That is if one had access to a calibration laboratory. **Q: Do you have this set in metric? If so, Can you provide set number?** A: We have these: http://www.shars.com/products/view/5352/Grade_2_87_PC_Metric_Gauge_Block_Setbut they're a higher grade. **Q: does the certification show that these blocks are ISO 17025 certified?** A: Inspections are taken place in a ISO-9001 certified laboratory and each block's measurement is recorded on the NIST traceable certificate, not a ISO17025 long form certificate ## Frequently Bought Together - Shars Grade 0 Rectangular Gage Block Set with NIST traceable Certificate 81 PCS 303-5307C M) - Mitutoyo 050101, Edge Finder, 3/8" Dia. Shank, .200" Dia. Tip - Mitutoyo 293-340-30 Digital Micrometer, Inch/Metric, Ratchet Stop, 0-1" (0-25.4mm) Range, 0.00005" (0.001mm) Resolution, +/-0.00005" Accuracy, Meets IP65 Specifications --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/72690199-shars-grade-0-rectangular-gage-block-set-with-nist-traceable](https://www.desertcart.co.uk/products/72690199-shars-grade-0-rectangular-gage-block-set-with-nist-traceable) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-26*