Heyco Plugs HEYCap Tapered Caps and Plugs - NPT
Polyethyene Tapered Cap
Polyethyene Tapered Plug

Material: Low Density Polyethylene

Standard Color: Red

Applicable Specs: MIL-C-5501/7 (MIL-C-52078), NAS-834

Temperature Rating: 79°C (175°F)

 
  • HEYCaps can be used as either caps or plugs.
  • Because they are tapered in design and made from highly flexible polyethylene, they not only fit snugly but are readily removable.
  • CAPS:
    • Especially recommended for use on threaded external NPT Fitting Hubs.
    • Part dimensions are based on average threaded hub fit. Before ordering in quantity, please sample HEYCaps.
    • Recommended Closures: Threaded hubs where Cap dimension "B" is at least 1% smaller than the hub to be capped. Minimum .020" (0,5 mm).
  • PLUGS:
    • Especially recommended for use on threaded internal NPT fittings and mounting holes.
    • Part dimensions are based on average tapped hole fit. Before ordering in quantity, please sample HEYCap Tapered Plugs.
    • Recommended Closures: Threaded mounting holes where Plug dimension "A" is at least 1% larger than the hole to be plugged. Minimum .020" (0,5 mm)
HEYCap Tapered Caps and Plugs - NPT
For NPT Fitting Hubs and Threaded Mounting Holes
Fits This NPT Hub or
Mounting Hole
Part
Number
Description Part Dimensions
Body Diameters Head Diameter Depth
A - Major B - Minor C D
Red in. mm. in. mm. in. mm. in. mm.
HEYCap Tapered Caps * for NPT Fitting Hubs – Body Diameters reference Inside
1/8 G5014 TCP 49-42 †   .42 10,7   .36   9,0   .63 16,0 .38   9,7
1/4 G5020 TCP 61-55   .55 13,8   .47 11,9   .75 19,1 .44 11,2
3/8 G5027 TCP 76-69   .69 17,6   .61 15,6   .88 22,4 .50 12,7
1/2 G5035 TCP 91-85   .85 21,6   .74 18,8 1.06 26,9 .63 16,0
3/4 G5047 TCP 115-108 1.08 27,5   .93 23,7 1.31 33,3 .75 19,1
1 G5057 TCP 136-130 1.30 33,0 1.17 29,8 1.50 38,1 .81 20,6
1-1/4 G5071 TCP 168-162 1.62 41,1 1.50 38,0 1.88 47,8 .75 19,1
1-1/2 G5080 TCP 195-189 1.89 48,0 1.72 43,6 2.13 54,1 1.00   25,4
2 G5096 TCP 246-240 2.40 61,0 2.24 56,8 2.63 66,8
2-1/2 G5110 TCP 299-295 2.95 74,9 2.69 68,2 3.13 79,5
3 G5116 TCP 356-349 3.49 88,7 3.20 81,3 3.69 93,7 1.13   28,7
HEYCap Tapered Plugs ** for NPT Threaded Mounting Holes – Body Diameters reference Outside
1/8 G5011 TCP 40-33   .40 10,1   .33   8,4   .53 13,5 .38   9,7
1/4 G5014 TCP 49-42 †   .49 12,4   .42 10,7   .63 16,0
3/8 G5022 TCP 63-57   .63 16,0   .55 14,0   .75 19,1 .47 11,9
1/2 G5029 TCP 79-73   .79 20,1   .69 17,5   .94 23,9 .56 14,2
3/4 G5040 TCP 104-98 1.04 26,4   .92 23,4 1.16 29,5 .69 17,5
1 G5048 TCP 122-115 1.22 31,0 1.09 27,7 1.41 35,8 .75 19,1
1-1/4 G5068 TCP 160-154 1.60 40,6 1.51 38,4 1.75 44,5 .50 12,7
1-1/2 G5075 TCP 181-175 1.81 46,0 1.78 45,2 2.00 50,8 .38   9,7
2 G5090 TCP 226-220 2.26 57,4 2.23 56,6 2.50 63,5 .50 12,7
2-1/2 G5106 TCP 279-273 2.79 70,9 2.64 67,1 2.94 74,7 .75 19,1
3 G5115 TCP 346-338 3.46 87,9 3.33 84,6 3.63 92,2
*  May also be used as Plugs: to determine Outside Diameters, add approximately .06" (1,5 mm) to Inside Diameter dimensions.
** May also be used as Caps: to determine Inside Diameters, subtract approximately .06" (1,5 mm) from Outside Diameter dimensions.
†  Part No. G5014 functions as a Cap for NPT 1/8" Hubs and a Plug for NPT 1/4" Hubs.