Ansi Flange Full Face Gasket

Tuf-Steel Full Faced Flanged Gasket

These gaskets are suitable for service with ANSI 150# and 300# rated flanged connections.

  • Dimensions meet ANSI B16.5 standard for pipe flanges and gaskets.
  • Dimensional Tolerances (unless otherwise stated) through 1" @ +/- 1/32", from 1" through 12" @ +/- 1/16", from 12" through 24" @+/- 3/32", and over 24" @ +/- 1/4".
  • "New Style" Flange Gasket dimensions are listed below, but "Old Style" are also available.  The only difference is that "New Style" have a slightly enlarged ID on 12" and below so as not to obstruct flow when compressed (bolt holes/circles unaffected).
  • Standard Pipe Flange Gaskets are SBR Rubber (Red Rubber), but Neoprene, EPDM, Buna N, Silicone, Viton (Fluoroelastomer), and other rubber compounds are also  available upon request.
  • Gasket thicknesses between 1/16" and 1/8" are readily available in most materials; standard hardness options include 40 through 80 durometer (Shore A).

Available Materials

  • Buna (Black or White)
  • EPDM (Black or White)
  • FKM Fluoroelastomer (Black or White)
  • Platinum Silicone
  • Tuf-Flex®
  • Tuf-Steel®
Ansi Flange Full Face 150# and 300# Gasket Sizing Table
  125-150 LB 250-300 LB
Flange Size OD ID Holes Hole Dia. Bolt Circle Dia. OD ID Holes Hole Dia. Bolt Circle Dia.
1/2" 3 1/2 27/32 4 5/8 2 3/8 3 3/4 27/32 4 5/8 2 5/8
3/4" 3 7/8 1 1/16 4 5/8 2 3/4 4 5/8 1 1/16 4 3/4 3 1/4
1" 4 1/4 1 5/16 4 5/8 3 1/8 4 7/8 1 5/16 4 3/4 3 1/2
1 1/4" 4 5/8 1 21/32 4 5/8 3 1/2 5 1/4 1 21/32 4 3/4 3 7/8
1 1/2" 5 1 29/32 4 5/8 3 7/8 6 1/8 1 29/32 4 3/4 4 1/2
2" 6 2 3/8 4 3/4 4 3/4 6 1/2 2 3/8 8 7/8 5
2 1/2" 7 2 7/8 4 3/4 5 1/2 7 1/2 2 7/8 8 7/8 5 7/8
3" 7 1/2 3 1/2 4 3/4 6 8 1/4 3 1/2 8 7/8 6 5/8
3 1/2" 8 1/2 4 8 3/4 7 9 4 8 7/8 7 1/4
4" 9 4 1/2 8 3/4 7 1/2 10 4 1/2 8 7/8 7 7/8
4 1/2" 9 1/4 5 8 3/4 7 3/4 10 1/2 5 8 7/8 8 1/2
5" 10 5 9/16 8 7/8 8 1/2 11 5 9/16 8 7/8 9 1/4
6" 11 6 5/8 8 7/8 9 1/2 12 1/2 6 5/8 12 7/8 10 5/8
7" 12 1/2 7 5/8 8 7/8 10 3/4 14 7 5/8 12 7/8 11 7/8
8" 13 1/2 8 5/8 8 7/8 11 3/4 15 8 5/8 12 1 13
9" 15 9 5/8 12 7/8 13 1/4 16 1/4 9 5/8 12 1 14
10" 16 10 3/4 12 1 14 1/4 17 1/2 10 3/4 16 1 1/8 15 1/4
12" 19 12 3/4 12 1 17 20 1/2 12 3/4 16 1 1/4 17 3 4
14" 21 14 12 1 1/8 18 3/4 23 14 20 1 1/4 20 1/4
15" 22 1/4 15 16 1 1/8 20          
16" 23 1/2 16 16 1 1/8 21 1/4 25 1/2 16 20 1 3/8 22 1/2
18" 25 18 16 1 1/4 22 3/4 28 18 24 1 3/8 24 3/4
20" 27 1/2 20 20 1 1/4 25 30 1/2 20 24 1 3/8 27
22" 29 1/2 22 20 1 1/4 27 1/4 33 22 24 1 3/8 29 1/4
24" 32 24 20 1 3/8 29 1/2 36 24 24 1 5/8 32
26" 34 3/4 26 24 1 3/8 31 3/4 38 1/4 26 28 1 5/8 34 1/2
28" 36 1/2 28 26 1 3/8 34 40 3/4 28 28 1 5/8 37
30" 38 3/4 30 28 1 3/8 36 43 30 28 1 7/8 39 1/4
32" 41 3/4 32 28 1 5/8 38 1/2 45 1/4 32 28 1 7/8 41 1/2
34" 43 3/4 34 32 1 5/8 40 1/2 47 1/2 34 28 1 7/8 43 1/2
36" 46 36 32 1 5/8 42 3/4 50 36 32 2 1/8 46
38" 48 3/4 38 36 1 5/8 45 1/4 52 1/4 38 32 2 1/8 48
40" 50 3/4 40 36 1 5/8 47 1/4 54 1/4 40 36 2 1/8 50 1/4
42" 53 42 36 1 5/8 49 1/2 57 42 36 2 1/8 52 3/4
44" 55 1/4 44 40 1 5/8 51 3/4 59 1/4 44 36 2 1/8 55
46" 57 1/4 46 40 1 5/8 53 3/4 61 1/2 46 40 2 1/8 57 1/4
48" 59 1/2 48 44 1 5/8 56 65 48 40 2 1/8 60 3/4