Sealed Taper Plug

Sealed taper plug is actually commonly used in our daily lives for example; car, water/gas stop valve, and Hydraulic equipment.
 
Many tapered screw parts are used in automobile parts in conjunction with sealants for hydraulic stop for plugs and joints. To prevent
 oil leaking, a solid seal is required.

However, just because it would be a problem if oil leaked, it would be very difficult to wrap or install the seal manually.

For this reason, Hanshin Neji has pre-sealed products in stock.

We have stock and sell products called sealed taper plug in variety of sizes.
 
Seal processing is also possible for other screws, so liquid leakage, water leakage, oil leakage etc.

Please feel free to contact us if you have any inquiry of sealing fasteners.
For Hydraulics (Sunk Plug)

Unit : mm
Size and screw threadScrew reference diameterReference diameterWidth across flatHole depthLength
Outer diamer(d)Pitch diameterMinor diameteraToleranceBTolerancem(Min)/Tolerance
R⅛-289.7289.1478.5660.45+1.1
0
5+0.100
+0.030
37 ±0.4
R¼-1913.15712.30111.4450.7+1.5
0
6+0.100
+0.030
4.510 ±0.4
R⅜-1916.66215.80614.95

0.7

+1.5
 0
8+0.130
+0.040
510 ±0.5
R½-1420.95519.79318.6310.9+2
0
10+0.130
+0.040
612.5±0.5 
R¾-14 26.44125.27924.1170.9+2
0
14+0.230
+0.050
714 ±0.5
R1-1133.24931.7730.2911.1+2.2
0
17+0.230
+0.050
917.5 ±0.5
R1¼-1141.9140.43138.9521.1+2.2
0
22+0.275
+0.065
1019  ±0.5
R1½-11 47.803 46.324 44.8451.1  +2.2
0
22 +0.275
+0.065 
10  20 ±0.5
General application (Flat plug)

Unit : mm
Size and screw threadScrew reference diameterReference diameterWidth across flatHole depthLength
Outer diamer(d)Pitch diameterMinor diameteraTolerancebTolerancem(Min)/Tolerance
R⅛-289.7289.1478.5660.97±0.915+0.100
+0.030
38+-0.4
R¼-1913.15712.30111.4456.01±1.346+0.100
+0.030
511+-0.4
R⅜-1916.66215.80614.956.35±1.348+0.130
+0.040
12+-0.5
R½-1420.95519.79318.6318.16±1.8110+0.130
+0.040
6.5 15+-0.5
R¾-14 26.44125.27924.1179.53±1.8114+0.230
+0.050
17+-0.5
R1-1133.24931.7730.29110.39±2.3117+0.230
+0.050
10 19+-0.5
 R1¼-11 41.9140.431 38.952 12.7 ±2.31 22  +0.275
+0.065
10 21.5 +-0.5
R1½-1147.80346.32444.84512.7±2.3122+0.275
+0.065
10 21.5+-0.5
Square Head Taper Plug

Unit : mm
Size and screw threadScrew reference diameterReference diameterWidth across flatWidth across flatLengthTotal length
Outer diamer(d)Pitch diameterMinor diameteraTolerancebTolerancemn/
R⅛-289.7289.1478.5663.97+-0.917+0
-0.2
7916
R¼-1913.15712.30111.4456.01+-1.349+0
-0.2
81220
R⅜-1916.66215.80614.956.35+-1.3412+0
-0.3
91322
R½-1420.95519.79318.6318.16+-1.8114+0
-0.3
101626
R¾-14 26.44125.27924.1179.53+-1.8117+0
-0.3
111829
R1-1133.24931.7730.29110.39+-2.3119+0
-0.3
142034