[ PROJECTION WELD SCREWS - M80 & M81 ]
   

Easy-Spot "80" & "81" Weld Pins have three
precision projections 120° apart, under the
head permitting through hole applications. The
increased strength to surrounding metal
makes the "80" & "81" useful as a stop, hinge pin,
bearing surface or support.

M80
Body Diameter 0.117 0.144 0.163 0.19 0.218 0.25 0.277 0.335 0.375 0.5
0.114 0.14 0.159 0.185 0.213 0.244 0.271 0.328 0.368 0.482
"HD" Head Diameter 0.323 0.385 0.448 0.51 0.575 0.635 0.755 0.88 0.88 1.005
0.303 0.365 0.428 0.49 0.55 0.61 0.725 0.85 0.85 0.975
"HT" Thickness 0.052 0.068 0.068 0.083 0.083 0.083 0.099 0.114 0.13 0.146
0.042 0.058 0.058 0.073 0.073 0.073 0.089 0.104 0.12 0.136
"A" Projection Diameter 0.055 0.075 0.085 0.095 0.105 0.105 0.125 0.135 0.135 0.155
0.045 0.065 0.075 0.085 0.095 0.095 0.115 0.125 0.125 0.145
"B" Projection Height 0.022 0.027 0.032 0.037 0.042 0.042 0.047 0.052 0.052 0.062
0.018 0.023 0.028 0.033 0.038 0.038 0.043 0.048 0.048 0.058
Length Length "L:
Part Number
Tolerance (underhead)
  1/4   80-1404   80-1904            
Under 1" 5/16 80-1105 80-1405 80-1605     80-2505        
+.000 3/8   80-1406   80-1906 80-2106 80-2506        
-.03 1/2 80-1108 80-1408 80-1608 80-1908 80-2108 80-2508   80-3308 80-3708  
  5/8   80-1410   80-1910   80-2510   80-3310 80-3710  
1" to 2" 3/4     80-1612 80-1912   80-2512 80-2712 80-3312 80-3712 80-5012
+.000 1       80-1916   80-2516 80-2716 80-3316 80-3716  
-.06 1-1/8                   80-5018
  1-1/4           80-2520     80-3720  
  1-1/2       80-1924   80-2524        
  2           80-2532     80-3732  

M81

Size 3mm 4mm 5mm 6mm 8mm 10mm 12mm
Body Diameter "D" 3 4 5 6 8 10 12
2.9 3.9 4.88 5.87 7.85 9.83 11.82
"HD" Head Diameter 8.2 11 13.3 15.8 20.4 24.4 25.6
7.7 10.5 12.7 15.2 19.6 23.6 24.8
"HT" Thickness 1.33 1.63 1.93 2.23 2.93 3.53 3.73
1.07 1.37 1.67 1.97 2.67 3.27 3.47
"A" Projection Diameter 1.53 2.16 2.53 2.87 3.43 3.81 3.94
1.27 1.9 2.27 2.61 3.17 3.55 3.68
"B" Projection Height 0.58 0.81 0.98 1.09 1.32 1.49 1.57
0.48 0.71 0.88 0.99 1.22 1.39 1.47
Length Tolerance Length "L" Under Head Part Number            
6mm 81-03006 81-04006          
+0.4 8mm 81-03008 81-04008 81-05008 81-06008      
-0.4 12mm 81-03012 81-04012 81-05012 81-06012      
16mm 81-03016 81-04016 81-05016 81-06016  81-08016    
20mm     81-05020 81-06020  81-08020  81-10020  81-12020
25mm     81-05025 81-06025  81-08025  81-10025  
30mm       81-08030  81-08030  81-10030  81-12030
40mm       81-08040  81-08040  81-10040  
50mm       81-08050  81-08050  81-10050  81-12050