UN thread ring & plug gauges supplier
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 the next days delivery.
Standard tolerance: Plug 2B & ring 2A
Internal thread tolerance class: 1B、2B、3B;
External thread tolerance class: 1A、2A、3A
Classes 2A and 2B are the most commonly used for general applications, including production of bolts, screws,nuts, and fasteners.
Classes 3A and 3B can be used when closer tolerances are required.
Classes 1A and 1B are used on threaded components where quick and easy assembly is necessary and where a liberal allowance is required to permit ready assembly, even with slightly bruised or dirty thread.
Thread gauges-fixed limit gauges are quick ,saving-cost and accurate thread inspection tools, it is very easy to be used. They works on a pass/fail basis, not check detailed size. These GO NOGO thread gages check the major diameter, pitch diameter of workpiece’s thread, they also inspect the thread angle, pitch etc. But not checking minor diameter of thread, it need plain thread gages to check minor diameter of thread.
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 pc is also acceptable, usually we need two weeks to finish ring gages, and ten days to finish plug gages.
If clients need, we can provide long form calibration certificates from third party calibration lab ISO17025 accredited for these united thread ring gages and plug gauges.
UN thread plug gages: Taperlock double ends with one handle,
UN thread ring gages: Solid
All these UN thread gauges are brand new
Standard：ASME B1.2-1983 ASMEB1.3-2007
We have as below standard sizes’ UN screw plug gages and screw ring gages in stock.
We accept payment of T/t (bank transfer), Paypal and Credit card. We 100% be sure gauges’s quality, when clients received goods, if found any place not satisfied, clients can give back to us, we will undertake all the loss including shipping cost .
We usually send goods by express, DHL, Fedex or UPS, clients can receive goods taking 3-5 days.
UN thread
H=0.86602540 P; 5H/8=0.541 265 88 P; 3H/8=0.324 759 53 P
H/4=0.126 506 35 P; H/8=0.108 253 18 P
How to order:
- Specify diameter, for example, 2 1/4″
- Specify TPI, for example, TPI 12
- Specify thread form, for example, UN
- Specify ring gage or plug gage, ring gage for checking external thread, plug gauge for checking internal thread.
- Specify class of fit, for example: 2A
- Specify quantity
- After receiving above information, we will make an invoice and send money request, then clients can pay it.
Quality Policy:
At gaugestools, 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.
Constant Pitch Series(UN)
The various constant-pitch series, UN, with 4,6,8,12,16,20,28, and 32 threads per inch, offer a comprehensive range of diameter-pitch combinations for those purposes where the threads in the Coarse, Fine, and Extra-fine series do not meet the particular requirements of the design.
When selecting threads from these constant-pitch series, preference should be given wherever possible to those tabulated in the 8-,12-, or 16- thread series.
8-Thread Series: The 8-thread series(8-UN) is a uniform-pitch series for large diameters,. Although originally intended for high-pressure-joint bolts and nuts, it is now widely used as a substitute for the Coarse-Thread Series for diameters larger than in inch.
12-thread series: The 12-thread series(12- UN) is a uniform pitch series for large diameters requiring threads of medium-fine pitch. Although originally intended for boiler practice, it is now used as a continuation of the Fine-Thread Series for diameters larger than 1 1/2 inches.
16-Thread Series: The 16-thread series(16-UN) is a uniform pitch series for large diameters requiring fine-pitch threads. It is suitable for adjusting collars and retaining nuts, and also serves as a continuation of the Extra-fine Thread series for diameters larger than 1 11/16 inches.
4-,6-,20-,28-, and 32- Thread Series: These thread series have been used more or less widely in industry for various applications where the Standard Coarse, Fine and Extra-fine Series were not as applicable. They are now recognized as Standard Unified Thread Series in ad specified selection of diameters for each pitch.
Why choose our UN thread gauge:
- Material is 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
- Thread plug gages below 4″ are taper-lock style,the GO NOGO ends are connected by aluminum handles. Plug gauges above 4″ are nested structure, reducing the weight, easy to use.
- Complete specifications in stock, one-stop purchasing
- High-grade ABS sealed inner packaging, anti rust and moisture proof.
- Great quality and competitive price
Some Pictures:
