Fasteners ni gaw jak rung matut mahkai lam ni hta ahkyak ai arung arai ni rai nna, shanhte a quality gaw jak rung ni a shimlum lam hte kam hpa mai ai lam hpe hkrak hkrak hkra machyi shangun ai. Fastener ni gaw jai lang mai ai madang ni hpe hkan sa lu na matu, shanhte hpe hkrang shapraw ai hku nna, hkrak tup jep joi ai lam galaw ra ai.
Hkum hkrang hpe jep yu ai gaw madung lahkam re. Inspector ni gaw, myi man hte (sh) magnifying glass hku nna, fastener ntsa kaw n-gun n rawng ai, n-gun n rawng ai, n-gun n rawng ai, n-gun n rawng ai zawn re ai n kaja ai lam ni hpe jep yu ma ai. Shanhte gaw, n-gang ni n hkrat sum ai sha, baw hte n-gang lapran na galai shai ai lam gaw hkrak hkrak rai nna, galaw shapraw ai hta dan dawng ai n kaja ai lam n nga ai hpe jep yu na matu madung tawn ma ai.
Dimensional shadawn ai lam hta, calipers, micrometers, hte thread gauges zawn re ai hkrak tup shadawn ai arung arai ni hpe jai lang nna, n-gang a diameter, galu kaba ai, n-gang kaba ai zawn re ai ahkyak ai n-gang ni hpe shadawn shadang hku nna jep joi ai lam galaw ai. Dimensional hkam sharang ai lam ni hpe hkap la mai ai shadawn sharam kata kaw tawn da na matu, jep joi ai lam ni gaw, hkrang shapraw sumla ni (sh) hpaga lam a madang (ISO, DIN, hte GB zawn re ai) ni hpe atsawm sha hkan sa ra ai. Special-purpose fasteners ni a matu, bawnu galu ai hte n-gup magap sung ai zawn re ai jat bang ai parameter ni hpe mung shadawn ra ai.
Mechanical arung arai ni hpe chyam dinglik ai lam gaw madung lahkam langai rai nga ai. Tensile chyam dinglik jak hpe lang nna, shi a load-bearing capacity gaw material grade ra kadawn ai lam ni hte maren rai kun ngu ai hpe jep yu na matu, fastener a tensile n-gun hte yield n-gun hpe chyam yu ai. Hardness chyam dinglik ai lam (Rockwell or Brinell hardness zawn re ai) ni hpe mung galaw ai gaw, dai arung arai hpe n-gun ja ai hku galaw ai ladat gaw madang ni hte maren rai na matu re. Bolt hte nuts zawn re ai gyit da ai arung arai ni a matu, shanhte a shinggyin la lu ai atsam hpe jep joi na matu, torque-preload chyam dinglik ai lam (sh) screw-on chyam dinglik ai lam ni hpe mung galaw ra ai.
-n jahten sharun ai chyam dinglik ai lam gaw ra kadawn ai application ni a matu htuk manu ai. Magnetic particle chyam dinglik ai (MT) shing nrai, npu de shang wa ai chyam dinglik ai (PT) hpe lang nna, npu (sh) npu makau na-npu n-gun n-gun ni hpe mu lu ai; ultrasonic chyam dinglik ai (UT) shing nrai radiographic chyam dinglik ai (RT) hpe lang nna, kata na n kaja ai lam ni hpe sawk sagawn ai, grau nna -n-gun kaba ai (sh) ahkyak ai shingnip ni hpe sawk sagawn ai.
Ntsa lam hpe gram lajang ai chyam dinglik ai lam hta, n-gup magap a n-gun hpe shadawn ai (galvanizing zawn re ai), sau chya ai chyam dinglik ai lam (hpyen n-gun hpe ninghkap lu ai), grup yin masat kumla ni hpe sawk sagawn ai (hexavalent chromium content zawn re ai) ni hpe n-gun n-gun hte hkan sa lu na matu galaw ai lam ni lawm ai.
Hpang jahtum, chyam dinglik ai lam yawng hpe report langai mi hku nna shinggyin la nna, quality jep sagawn ai ni hku nna lata masat htu nna, madi shadaw ai lam galaw ai. N kaja ai arung arai ni hpe ginhka nna, hpa majaw byin ai hpe sawk sagawn ai. Atsam rawng ai arung arai ni sha packaging (sh) assembly de shang mai ai. Ndai madang masat da ai ladat gaw, n-gun rawng ai arung arai ni a hkam kaja lam hte engineering shim lum lam hpe hkrak hkra galaw ya lu ai.
