点击图片查看大图牙规只是螺纹量规的别称，有螺纹塞规（栓规）及螺纹环规；此外光滑环规、三针、针式光滑塞规等等都是围绕孔与螺纹为主的检测工具。
我司所出售的螺纹栓牙规（塞规）、环牙规（环规），技术过硬、专业程度高、交货快捷，是最具专业的螺纹牙规（量规）供应商，深受客户信赖，是众多客户的理想选择；亦可根据用户需求量身订做。
本页主要是为了描述一下用于检测螺纹、孔的量具，牙规也属于量具。
牙规是用来检测螺纹的检测工具，分塞规（栓规）和环规两种，分别用于螺纹的内（母）螺纹和外（公）螺纹，被检测的螺纹众多(美国标准统一制螺纹、普通螺纹、美制管螺纹、英制螺纹、API石油螺纹------），使用前经相关检验计量机构检验计量合格后，方可投入生产现场使用；此外你必须还得分清通规和止规，还有注意螺纹的精度等级。
一：螺纹塞规（栓规），一般同一个规格有两件作为一套同时使用，分别是通规和止规。
1、用通规试拧，如果不能拧进就不合格，此时就不必要再用止规了，因为它已经是不良品了。
2、用通规试拧，如果能够拧进，再用止规拧，如果止规也能拧进，那就不合格。
3、用通规试拧，如果能够拧进，再用止规拧，如果止规不能拧进或只拧进一两个牙，那就是合格品。
二：螺纹环规，也是两件作为一套使用，通规和止规。
1、通规
先清理干净被测螺纹油污、杂质，然后用母指与食指转动通端与被测螺纹，使其在自由状态下旋合通过螺纹长度，判定是否合格。
2、止规
清理干净被测螺纹油污及杂质，止端与被测螺纹对正后，用大母指与食指转动止端和被测外螺纹，旋入螺纹长度在2个螺距之内为合格，旋入螺纹过多即为不良品。
备注：以上所说只适用于公制、美制、英制的普通机械连接螺纹及美英制非螺纹密封量规的使用方法，不适合锥度螺纹量规，锥度量规是以基准位置检测。
三：维护与保养
1、牙规也是量具的一部分，牙规使用完毕后，应及时清理干净测量部位附着物。
2、生产现场在用牙规时，应轻拿轻放，以防止磕碰而损坏测量表面。
3、严禁将牙规作为切削工具强制旋入螺纹或挤出螺纹，避免造成早期磨损。
4、牙规严禁非计量工作人员或操作人员随意使用，以确保检测的准确性。
5、牙规长时间不用，应交计量管理部门或操作人员妥善保管。
四：注意事项
在用牙规应在每个工作日用校对工具计量一次，经校对，如果牙规计量超出公差时由相关人员收回，作相应的处理措施，及时处理，不得流入生产现场。
五：螺纹种类
以下所列的是在实际生产、加工、制造中较为常用的一些中外螺纹规格，
广泛用于航空航天、机械机电、电子电气、紧固件、石油管道等等不同的工业。
1、美国标准统一螺纹量规用于检测螺纹的内外牙。牙形众多美制粗牙（UNC）、美制细牙（UNF）、美制特细牙（UNEF）、美制不变螺距螺纹（UN）、美制特殊螺纹（UNS），其中又以UNC、UNF最为常用。外径尺寸小于1/4英寸（IN）的用番号表示：NO:0、NO:1、NO:2、NO:3、NO:4、NO:5、NO:6、NO:8、NO:10、NO:12，共10个番号；此后便用英寸制表示，如：1/4-20UNC，1/4是外径尺寸、20是每英寸的牙数、UNC是指美制统一螺纹中的粗牙，按惯例默认精度内螺纹2B、外螺纹2A；此螺纹可定做任意外径尺寸、精度的产品。
2、美制航空航天螺纹，除UNJ外，还有UNJC（粗牙）、UNJF（细牙）、UNJEF（超细牙）、UNJS（特殊直径、螺距、旋合长度的螺纹）；同一外径尺寸有多种不同的螺距。
UNJ（美国航空航天螺纹）是抗疲劳高精度螺纹，与普通的美制统一螺纹相比较，具有圆弧的牙底能减轻应力集中，且内螺纹的小径较其增大，减小了外螺纹的脱落面积，UNJ螺纹大多用在航天航空紧固件以及高尖端的工业产品中，使用的公差内螺纹3B、外螺纹3A，此为美制螺纹中最精密的配合等级。
表示方法如：
（1）、5/16-24UNJF-3A，此为细牙外螺纹3A精度正旋规格表示方法。
（2）、1/4-28UNJF-3A-LH，此为细牙外螺纹3A精度反旋（反牙）表示方法。
（3）、3/8-24UNJF-3B，此为细牙内螺纹3B精度表示方法，反旋（反牙）则加LH。
此螺纹亦可订做任意外径、螺距、旋向的产品。
3、美制管螺纹，美制标准锥管螺纹NPT、美制锥管干密封螺纹NPTF、美制直管螺纹NPSM、美制航空标准锥管螺纹ANPT；锥管螺纹有塞规有L1、L3、L6，环规有L1、L2、L6。
4、美制梯形爱克母螺纹英文为ACME，29°牙形角，有外径尺寸、每英尺牙数、公差代号组成，如：5/8-8 ACME-2G；短牙爱克母（STUB-ACME），此螺纹亦可定做任意外径、螺距、公差的产品。
5、普通螺纹量规公制（M），国际通用，也是最常用的螺纹，60°牙形角，平行机械连接用螺纹，只标M+外径尺寸，按惯例我们将提供粗牙螺纹，细牙螺距众多；精度方面，塞规大多（检内螺纹）为6H、环规（检外螺纹）为6h和6g，亦可按用户需求定做非标产品及航空加强螺纹（MJ），公制螺纹大写字母为内螺纹公差，小写字母为外螺纹公差。
6、英制管螺纹有两种，用螺纹密封的管螺纹量规RB，内螺纹代号为RC、外螺纹为R，量规代号RB代表平顶平底，相当于日标PT螺纹；另外一种为非螺纹密封管螺纹量规G，内螺纹只有一种公差，外螺纹有A、B两种。
7、美国石油协会（API）螺纹常用的有四种；
（1）、石油钻具接头螺纹量规，是检验石油钻杆接头、方钻杆和钻铤等钻杆结构件的连接螺纹的检验量具。根据钻具接头形式的不同，量规可分为正规型(REG)、贯眼型(FH)、数字型(NC)三种；而内平型（IF）则在逐步淘汰。
石油钻具接头螺纹量规正规型（REG）规格有2 3/8REG、2 7/8REG、3 1/2REG、4 1/2REG、5 1/2REG、6 5/8REG、7 5/8REG、8 5/8REG。
贯眼型（FH）规格有3 1/2FH、4 1/2FH、5 1/2FH、6 5/8FH。
数字型（NC）较常用规格有NC23、NC26、NC31、NC35、NC38、NC40、NC44、NC46、NC50、NC56、NC61、NC70、NC77等等。
（2）石油套管螺纹量规， CSG（短圆螺纹套管，螺纹为圆螺纹，齿顶、齿底为圆弧状；锥度为1：16；牙型角为60°，牙侧角为30°；螺距为3.175和2.54，牙型高度:1.810、1.412，每英寸8牙、10牙时），长圆螺纹套管代号（LCSG）。
BCSG（偏梯形螺纹套管，13 3/8″以下锥度为1：16，16″以上锥度为1：12，螺距为5.08(5牙/寸);牙型高为1.575;牙侧角为3°和13°,牙型角为13°。
注：13 3/8″以下，螺纹齿顶、齿底与母线平行；16″以上，螺纹齿顶、齿底与轴线平行。
CSG常用规格有4 1/2CSG、5CSG、6 5/8CSG、7CSG、7 5/8CSG。
LCSG常用规格有4 1/2LCSG、5LCSG、6 5/8LCSG、7LCSG、7 5/8LCSG。
BCSG常用规格有4 1/2BCSG、5BCSG、6 5/8BCSG、7BCSG、7 5/8BCSG。
（3）石油油管螺纹量规，此螺纹亦较为常用，规格有1.050TGB-4 1/2TBG（不加厚油管螺纹量规）、1.050UPTBG-4 1/2UPTBG（为外加厚油管螺纹量规），螺纹为60°牙形角、1：16的锥度。
TBG（不加厚NUE、NU）螺纹规格有1.050TBG、1.315TBG、1.660TBG、1.900TBG、2 3/8TBG、2 7/8TBG、3 1/2TBG、4TBG、4 1/2TBG。
UPTBG（加厚EUE、EU）螺纹规格有1.050UPTBG、1.315UPTBG、1.660UPTBG、1.900UPTBG、2 3/8UPTBG、2 7/8UPTBG、3 1/2UPTBG、4UPTBG、4 1/2UPTBG。
（4）石油管线管螺纹量规，标准代号为LP、牙形角为60°、1：16的锥度，螺距有0.9407、1.411、1.8143、2.2087、3.175。
石油管线螺纹量规规格有1/8LP、1/4LP、3/8LP、1/2LP、3/4LP、1LP、1 1/4LP、1 1/2LP、2LP、2 1/2LP、3LP、3 1/2LP、4LP、5LP、6LP。
备注：但凡未列出之规格，请来电咨询，需订做产品请提供外径尺寸、公差、旋向------，总之提供的数据越多越好，以避免不必要的麻烦。
Dental regulations is only another name for thread gauge, there are threaded plug gauge (cork rules) and the thread ring gauge; In addition, a smooth ring, three needles, needle, etc. are all around the smooth plug hole and thread-based detection tools.
Our teeth sold by the rules thread bolt (plug), ring teeth Planning (ring), strong skills and a high degree of professionalism, delivery speed, is the most professional of the thread teeth Planning (gauge) providers, deeply customer trust, is an ideal choice for many customers; can also be customized according to user demand for the body.
This page is mainly to describe what used to detect the thread, hole gauge, also belongs to measuring regulatory teeth.
Dental practice was used to detect thread detection tools, sub-plug (plug regulations) and the ring are two, one for internal thread (female) thread and external (public) thread, the thread has been detected a number of (American Standard Unified system thread, common thread, the U.S. system, pipe thread, inch thread, API oil thread ------), inspection prior to use measured by the relevant bodies after passing inspection and measurement before put into production on-site use; In addition, you must have to differentiate between pass rules and regulations only, as well as attention to the accuracy of thread hierarchy.
1: thread plug gauge (cork rules), generally the same specifications as a set of two simultaneously, namely, pass rules and regulations only.
1, with twist-pass regulatory tests, if not screwed on the failure, this time on unnecessary re-use only the rules, because it is a bad product.
2, with screw-pass regulatory tests, if we can screw into, and then only the regulatory twist, if the only regulation can also be screwed in, it failed.
3, with screw-pass regulatory tests, if we can screw into, and then only the regulatory twist, if the only regulation can not be screwed into or screwed in just one or two teeth and that is qualified.
2: thread ring, but also as a set of two to use, pass rules and regulations only.
1, Tung Regulation
First, clean up the thread measured oil, impurities, and then the mother means the end of the index finger with the measured rotation pass thread to spin in the free state together through the thread length, to determine eligibility.
2, only the rules
Clean up the thread measured oil and impurities, only the client and the tested thread right now, you use the Great Mother refers to rotate with the index finger only client and the measured external thread, screw thread pitch in length, within two qualified, screw thread too many bad products shall be.
Note: The above mentioned only applies to metric, American, British general mechanical connection system of non-screw thread and the United States and Britain to use sealed gauge is not suitable for taper thread gauge, taper gauge is a reference position detection.
3: Maintenance and Maintenance
1, is also a measuring part of the regulatory teeth, teeth regulation after use should be measured in time to clean up parts of fixtures.
2, the production site with the teeth in the regulations should be light-light, in order to prevent damage to measure the surface bump.
3, is strictly prohibited as a cutting tool will be a mandatory regulatory teeth screwed or threaded screw extruder to avoid early wear and tear.
4, dental regulations prohibited non-metering staff or operators are free to use in order to ensure the accuracy of detection.
5, teeth do not regulate a long time, due metering management or operator safekeeping.
4: Attention
Dental regulations in use in each work should be measured once daily use proofing tools, after proof-reading, if the teeth beyond the tolerance of regulatory measures by the relevant persons to recover for the corresponding measures to deal with, timely treatment, not into the production site.
5: Thread Type
Listed below is that in the actual production, processing, manufacturing some of the more commonly used domestic and foreign thread specifications,
Are widely used in aerospace, machinery and electrical and mechanical, electronic and electrical, fasteners, oil pipelines, etc. in different industries.
1, American Standard Unified screw thread gauges used to detect internal and external teeth. A number of US-made tooth-shaped coarse teeth (UNC), US-made fine teeth (UNF), US-made extra-fine teeth (UNEF), US-made constant pitch threads (UN), US-made a special thread (UNS), Among them, UNC, UNF most commonly used. Outer diameter size of less than 1 / 4 inches (IN) with the designation of the said: NO: 0, NO: 1, NO: 2, NO: 3, NO: 4, NO: 5, NO: 6, NO: 8, NO : 10, NO: 12, a total of 10 designations; since then, said the system using inches, such as: 1/4-20UNC, 1 / 4 is the outer diameter size, 20 is the number of teeth per inch, UNC is the thread of American Unity coarse teeth,
Default within the usual precision thread 2B, external thread 2A; this thread diameter can be made to order any size, precision products.
2, American aerospace thread, in addition to UNJ, there UNJC (coarse teeth), UNJF (fine tooth), UNJEF (fine teeth), UNJS (special diameter, pitch, rotation combined length of the thread); the same diameter size of There are many different pitch.
UNJ (National Aeronautics and Space thread) is the anti-fatigue and high-precision screw, and the ordinary American unity thread, compared with the arc of the teeth can reduce the stress concentration at the end, and the internal thread of the trail than the increases, reducing the external thread of the off area, UNJ threads are mostly used in aerospace fasteners, as well as highly sophisticated industrial products, the use of the internal thread tolerance 3B, external thread 3A, This is a US-made thread with the most sophisticated level.
Representation such as:
(1), 5/16-24UNJF-3A, This is a fine tooth MALE 3A precision specifications are spin representation.
(2), 1/4-28UNJF-3A-LH, This is a fine tooth MALE 3A precision anti-rotation (anti-tooth) representation.
(3), 3/8-24UNJF-3B, This is a fine tooth accuracy of representation within the thread 3B, anti-spin (anti-tooth) is added LH.
This thread can also be tailor-made arbitrary diameter, pitch, rotation to the product.
3, US-made pipe thread, American Standard taper pipe thread NPT, American taper pipe thread stem seal NPTF, US-made straight pipe thread NPSM, American Standard taper pipe thread air ANPT; taper pipe thread plug gauge have a L1, L3, L6, Ring Gauge There L1, L2, L6.
4, US-made trapezoidal thread English as mother love g ACME, 29 ° tooth-shaped angle, with diameter sizes, the number of teeth per foot, tolerance, code-named composition, such as: 5/8-8 ACME-2G; short teeth Eyck mother ( STUB-ACME), this thread can also be custom-made arbitrary diameter, pitch, tolerance products.
5, common thread gauge metric (M), the International General Motors, is the most common thread, 60 ° tooth-shaped angle, parallel mechanical connection with the thread, only marked M + diameter size of the practice we will provide coarse thread teeth, fine tooth large pitch; precision, most plug gauge (check inside the thread) for 6H, ring (check external thread) for 6h and 6g, can also be customized according to user needs non-standard products and air to enhance thread (MJ), metric screw caps letters for the internal thread tolerance, lower-case letters for the external thread tolerance.
6, inch pipe thread, there are two, sealed with screw pipe thread gauge RB, internal thread, code-named RC, external thread for the R, gauge, code-named representative of flat-topped flat-bottomed RB, equivalent to JIS PT thread; another kind of non-threaded Seal pipe thread gauge G, there is only one internal thread tolerance, external thread with A, B two kinds.
7, the American Petroleum Institute (API) There are four common thread;
(1), oil drilling connector thread gauge to test the oil drill pipe joints, square drill pipe and drill collars drill pipes and other structural parts of the connecting thread of the test measuring instruments. According to the different forms of joint drill, the amount of regulation can be divided into the regular type (REG), consistent eye-type (FH), digital-type (NC) three kinds; while inside the flat-type (IF) in the phase-out.
Oil-drilling screw gauge the regular-type connector (REG) specifications 2 3/8REG, 2 7/8REG, 3 1/2REG, 4 1/2REG, 5 1/2REG, 6 5/8REG, 7 5/8REG, 8 5 / 8REG.
Guan-Eye (FH) specifications 3 1/2FH, 4 1/2FH, 5 1/2FH, 6 5/8FH.
Digital-type (NC) are more commonly used specifications NC23, NC26, NC31, NC35, NC38, NC40, NC44, NC46, NC50, NC56, NC61, NC70, NC77 and so on.
(2) Oil casing thread gauge, CSG (short round thread casing, thread for the round thread, tooth top and bottom teeth for the arc-shaped; taper 1:16; tooth-type angle of 60 °, flank angle of 30 ° ; pitch of 3.175 and 2.54, tooth-type height: 1.810,1.412, 8 teeth per inch, 10 teeth), long round thread casing code (LCSG).
BCSG (Buttress thread casing, 13 3 / 8 "below taper 1:16,16" above 1:12 taper, pitch of 5.08 (5 teeth / inch); tooth-high of 1.575; flank angle of 3 ° and 13 °, tooth-type angle of 13 °.
Note: 13 3 / 8 "below the thread tooth top and bottom teeth in parallel with the bus; 16" above, thread tooth top and bottom teeth with the axis parallel to.
CSG common specifications 4 1/2CSG, 5CSG, 6 5/8CSG, 7CSG, 7 5/8CSG.
LCSG common specifications 4 1/2LCSG, 5LCSG, 6 5/8LCSG, 7LCSG, 7 5/8LCSG.
BCSG common specifications 4 1/2BCSG, 5BCSG, 6 5/8BCSG, 7BCSG, 7 5/8BCSG.
(3) oil pipeline thread gauges, this thread is more commonly used, specifications 1.050TGB-4 1/2TBG (no thicker gauge tubing thread), 1.050UPTBG-4 1/2UPTBG (for foreign thicker gauge tubing thread), thread to 60 ° tooth-shaped angle, 1:16 taper.
TBG (no thicker NUE, NU) thread specifications 1.050TBG, 1.315TBG, 1.660TBG, 1.900TBG, 2 3/8TBG, 2 7/8TBG, 3 1/2TBG, 4TBG, 4 1/2TBG.
UPTBG (thicker EUE, EU) thread specifications 1.050UPTBG, 1.315UPTBG, 1.660UPTBG, 1.900UPTBG, 2 3/8UPTBG, 2 7/8UPTBG, 3 1/2UPTBG, 4UPTBG, 4 1/2UPTBG.
(4) oil pipeline, pipe thread gauge, the standard, code-named LP, tooth-shaped angle 60 °, 1:16 taper, pitch a 0.9407,1.411,1.8143,2.2087,3.175.
Oil pipeline thread gauge specifications 1/8LP, 1/4LP, 3/8LP, 1/2LP, 3/4LP, 1LP, 1 1/4LP, 1 1/2LP, 2LP, 2 1/2LP, 3LP, 3 1 / 2LP, 4LP, 5LP, 6LP.
Note: But who have not traveled the specifications listed, please call consultation, need to order products please provide external diameter size, tolerance, spin the data provided to ------, short as possible, in order to avoid unnecessary trouble.
