About Us
Iranpitch Co. was founded in 1986 in Yazd. Due to our expansion program, our factory was moved to Yazd's Special Economic Zone in 2018 and expanded our production facilities such as progressive cold formers , continuous heattreating line , de-oiling , de-phosphating line and finally Geomet coating . Our production capacity is increased to 12,000 M/T in house. Our main products are standard screws , fasteners for automotive industry and mainly in steel structure for high strength structural bolting assemblies for preloading in the complete range for EN14399-3 , EN14399-4 and EN14399-10. the process is cold-formed. One of the most advantages of Iranpitch is the back ground and experience of human resources during past years for controlling K factor on preloaded bolting assemblies. Thanks to NOF metal coating group which Iranpitch has the licency for Geomet coating on fasteners. Besides , ISO9001/2015 , IATF16949;2016 certificates are implied in Iranpitch as quality management system. Iranpitch laboratory succeeded to gaining ISO/IEC 17025:2017 certificate from NACI Due to controlling the mechanical properties and correct heat treatment for steel structure , nuts assembled with Iranpitch bolts are heattreated in house. (Requirement of EN14399-2).High strength structural bolting assemblies for preloading delivered to en users with certificate containing .required torque for pre loading
TC BOLT: EN14399-10 system HRC
- Details
- Written by Super User
- Category: Products
- Published: 28 April 2014
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سهولت در نصب ، مزیت های اقتصادی و اطمینان از دستیابی به نیروی پیش تنیدگی به واسطه بریده شدن نوک فیوزی TC Bolts اعتماد مضاعفی را در مجریان اتصالات سازه های فلزی در کشورهای توسعه یافته ایجاد کرده و شرکت ایران پیچ با درک این نیاز افدام به تولید TC Bolt نموده است.
محدوده تولیدات : M16 تا M30 در طول های استاندارد.
Dimensions of Cup Head bolts
| Thread d | M12 | M16 | M20 | M22 | M24 | M27 | M30 | |
| pb | 1,75 | 2 | 2,5 | 2,5 | 3 | 3 | 3,5 | |
| b (ref.) | c | 30 | 38 | 46 | 50 | 54 | 60 | 66 |
| d | --- | 44 | 52 | 56 | 60 | 66 | 72 | |
| e | --- | --- | 65 | 69 | 73 | 79 | 85 | |
| c | max. | 0,8 | 0,8 | 0,8 | 0,8 | 0,8 | 0,8 | 0,8 |
| min. | 0,4 | 0,4 | 0,4 | 0,4 | 0,4 | 0,4 | 0,4 | |
| da | max. | 15,2 | 19,2 | 24,4 | 26,4 | 28,4 | 32,4 | 35,4 |
| ds | max. | 12,70 | 16,70 | 20,84 | 22,84 | 24,84 | 27,84 | 30,84 |
| min. | 11,30 | 15,30 | 19,16 | 21,16 | 23,16 | 26,16 | 29,16 | |
| dw | max. | |||||||
| min. | 20,1 | 24,9 | 29,5 | 33,3 | 38,0 | 42,8 | 46,6 | |
| e | min. | 23,91 | 29,56 | 35,03 | 39,55 | 45,20 | 50,85 | 55,37 |
| k | nom. | 7,5 | 10 | 12,5 | 14 | 15 | 17 | 18,7 |
| max. | 7,95 | 10,75 | 13,40 | 14,90 | 15,90 | 17,90 | 19,75 | |
| min. | 7,05 | 9,25 | 11,60 | 13,10 | 14,10 | 16,10 | 17,65 | |
| kw | min. | 4,9 | 6,5 | 8,1 | 9,2 | 9,9 | 11,3 | 12,4 |
| r | min. | 1,2 | 1,2 | 1,5 | 1,5 | 1,5 | 2,0 | 2,0 |
| s | max. | 22 | 27 | 32 | 36 | 41 | 46 | 50 |
| min. | 21,16 | 26,16 | 31 | 35 | 40 | 45 | 49 | |
Limiting Values of Bolt Force at the Fracture of the Spline-end
| Thread d |
Nominal stress area of standard test mandrel As mm2 |
Fr min 0,7 x ƒub x Asa N |
Fr mean min 0,77 x ƒub x Asa N |
| M12 | 84,3 | 59 101 | 64 911 |
| M16 | 157 | 109 900 | 120 890 |
| M20 | 245 | 171 500 | 188 650 |
| M22 | 303 | 212 100 | 233 310 |
| M24 | 353 | 247 100 | 271 810 |
| M27 | 459 | 321 300 | 353 430 |
| M30 | 561 | 391 700 | 431 970 |
aƒub is the nominal tensile strength of the bolt (Rm, nom).
Proof load values of Nuts
| Thread d | Nominal stress area of standard test mandrel As mm2 |
Property class 10 Tolerance class 6 H or 6 AZProof load (As x Sp), N Nuts with height m = 1 d (HRD)b |
| M12 | 84,3 | 104 900 |
| M16 | 157 | 195 500 |
| M20 | 245 | 305 000 |
| M22 | 303 | 377 200 |
| M24 | 353 | 439 500 |
| M27 | 459 | 571 500 |
| M30 | 561 | 698 400 |
b The proof load values are based on the stress under proof load of 1 245 MPa.
Dimension of nuts according to EN 14399-3:2005(HR)a
| Thread d | M12 | M16 | M20 | M22 | M24 | M27 | M30 | |
| Pb | 1,75 | 2 | 2,5 | 2,5 | 3 | 3 | 3,5 | |
| da | max. | 13 | 17,3 | 21,6 | 23,7 | 25,9 | 29,1 | 32,4 |
| min. | 12 | 16 | 20 | 22 | 24 | 27 | 30 | |
| dw | max. | c | ||||||
| min. | 20,1 | 24,9 | 29,5 | 33,3 | 38,0 | 42,8 | 46,6 | |
| e | min. | 23,91 | 29,56 | 35,03 | 39,55 | 45,20 | 50,85 | 55,37 |
| m | max. | 12,35 | 16,35 | 20,65 | 22,65 | 24,65 | 27,65 | 30,65 |
| min. | 11.65 | 15,65 | 19,35 | 21,35 | 23,35 | 26,35 | 29,35 | |
| mw | min. | 9,32 | 12,52 | 15,48 | 17,08 | 18,68 | 21,08 | 23,48 |
| c | max. | 0,8 | 0,8 | 0,8 | 0,8 | 0,8 | 0,8 | 0,8 |
| min. | 0,4 | 0,4 | 0,4 | 0,4 | 0,4 | 0,4 | 0,4 | |
| s | max. | 22 | 27 | 32 | 36 | 41 | 46 | 50 |
| min. | 21,16 | 26,16 | 31 | 35 | 40 | 45 | 49 | |
| t | 0,38 | 0,47 | 0,58 | 0,63 | 0,72 | 0,80 | 0,87 | |
a For hot dip galvanized nuts, the dimensions apply before galvanzing.
b P is the pitch of thread.
c dw, max. = sactual.
Dimensions
| Normal size d (nominal thread diameter of associated bolts) |
12 | (14)a | 16 | (18)a | 20 | 22 | 24 | 27 | 30 | 36 | |
| d1 | min. | 13 | 15 | 17 | 19 | 21 | 23 | 25 | 28 | 31 | 37 |
| max. | 13,27 | 15,27 | 17,27 | 19,33 | 21,33 | 23,33 | 25,33 | 28,52 | 31,62 | 37,62 | |
| d2 | min. | 23,48 | 27,48 | 29,48 | 33,38 | 36,38 | 38,38 | 43,38 | 49 | 54,80 | 64,80 |
| max. | 24 | 28 | 30 | 34 | 37 | 39 | 44 | 50 | 56 | 66 | |
| h | nom. | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 |
| min. | 2,7 | 2,7 | 3,7 | 3,7 | 3,7 | 3,7 | 3,7 | 4,4 | 4,4 | 5,4 | |
| max. | 3,3 | 3,3 | 4,3 | 4,3 | 4,3 | 4,3 | 4,3 | 5,6 | 5,6 | 6,6 | |
| e | nom. = min. | 0,5 | 0,5 | 0,75 | 0,75 | 0,75 | 0,75 | 0,75 | 1 | 1 | 1,25 |
| max. | 1 | 1 | 1,50 | 1,50 | 1,50 | 1,50 | 1,50 | 2 | 2 | 2,50 | |
| c | min. | 1,6 | 1,6 | 1,6 | 2 | 2,0 | 2,0 | 2,0 | 2,5 | 2,5 | 2,5 |
| max. | 1,9 | 1,9 | 1,9 | 2,5 | 2,5 | 2,5 | 2,5 | 3,0 | 3,0 | 3,0 | |
NOTE : For hot dip galvanized washers the above dimensions apply prior to galvanzing.
a Sizes in brackets are non-preferred sizes.