China Unc3 4-20 2A Thread Ring Gauges for Screw Bolt Testing Inspection Metric Unc Unf DIN ISO Standard

UN UNC UNEF Precision Master Ring Gages Go and NoGo Thread Ring Gauge
UN thread gauge is Unified Constant Pitch thread gauge.
GO & NOGO, RH(ring hand) & LH(left hand) available.
From 5/16-6″ many standard sizes in stock, can keep within 3 days delivery.
Standard tolerance: Ring 2A.
External thread tolerance class: 1A,2A,3A.
Classes 2A are the most commonly used for general applications, including production of bolts, screws,nuts, and fasteners.
Classes 3A can be used when closer tolerances are required.
Material: GCr15 bearing steel-oil hardened tool steel- high wear resistance.
Hardness: 58-62 HRC.
ISO9001: 2008 certified manufacturer.

For special gauge without stock (For example, special diameter, special TPI, multi-start, pre-plated, left hand thread etc) we can provide special custom production service, one pcs is also acceptable, usually we need 2-3 weeks to finish ring gauges.

All these UN thread ring gauges are brand new.
Standard: JB/T 10865-2008 ASME B1.2-1983 ASMEB1.3-2007.

Why choose our UN thread ring gauge:
♦ Material: bearing steel (GCR15), having high hardness on measuring surface, tough enough to wear and long durability.
♦ Simple-operating,stable function, high precision.
♦ A special process on surface, corrosion resistance.
♦ Through high-precision inspection equipment full inspection, to ensure accurate measurement.
♦ Plastic box, carton packaging, energy saving.
♦ Complete specifications in stock, one-stop purchasing.
♦ High-grade ABS sealed inner packaging, anti rust and moisture proof.
♦ Great quality and competitive price.

Quality Policy:
At Mistolin, we strive to offer clients quality metric thread ring gages and plug gauges with competitive price and quick shipment. We not only strive to meet clients' expectations, but also exceed clients' expectations by continual improvements.

Return Policy:
We will exchange or refund in one week if clients found any products not quality enough or meet clients' expectations. After receiving our products, once clients have anywhere not satisfied, please contact us at once, clients can send us Email, or contact us with livechat, we will deal with clients' problems in quick time, we are committed to providing 100% customer satisfaction.