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Keith Specialty Store
6791 Rt 119 Hwy N,  Marion Center, PA 15759
US callers: 800-705-8838
FAX: 724-397-2228
Canada: 724-397-8838
8:00am-6:00pm  M-F, 8:00am-3:00pm Sat. (ET)


 

Plum Brass Compression-Groups

Compression fittings are used primarily for water on copper, vinyl or poly (plastic) tubing.  They may be used for oil, but we recommend flare fittings instead. 

Unless labeled "lead-free," these fittings may not be used in potable water systems.

Do NOT use these compression fittings for lines carrying pressurized gases.

Compression threads are a very different pitch from iron pipe size threads (or national pipe thread taper).  Use a male or female adapter to transition between them.
All compression fittings are listed by OD [outside diameter].  See chart for OD to ID comparison.

O.D. [Outside Diameter] to I.D. [Inside Diameter] Tubing Size Conversion

tubing o.d.   tubing i.d.
1/4" 1/8"
3/8" 1/4"
1/2" 3/8"
5/8" 1/2"
Example:
Use 1/2" flare fittings
on 3/8" i.d. copper.
For small sizes, i.d. plus 1/8" equals o.d..

 

Definitions:  
  comp = male threaded compression fitting.
  mipt = male iron-pipe-size thread fitting.
 

fipt = female iron-pipe-size thread.

  • 04-010.jpg
    1/4 OD compression ferrule sku: 04-004, ($0.09) 3/8 OD compression ferrule sku: 04-006, ($0.13) 1/2 OD compression ferrule sku: 04-008, ($0.15) 5/8 OD compression ferrule sku: 04-010, ($0.18) 1/4 OD nylon compression ferrule sku: 04-012, ($0.19) 3/8 OD nylon compression ferrule sku: 04-014, ($0.14)
  • 04-040.jpg
    1/4 OD compression nut sku: 04-034, ($0.29) 3/8 OD compression nut sku: 04-036, ($0.39) 1/2 OD compression nut sku: 04-038, ($0.64) 5/8 OD compression nut sku: 04-040, ($0.82)
  • 04-311.jpg
    1/4 OD compression coupling sku: 04-305, ($1.36) 3/8 OD compression coupling, lead free sku: 04-307, ($1.97) 1/2 OD compression coupling sku: 04-309, ($2.85) 5/8 OD compression coupling sku: 04-311, ($3.51) 7/8 OD compression coupling sku: 04-313, ($7.85)
  • 04-330.jpg
    1/2 x 3/8 OD compression coupling, lead free sku: 04-325, ($2.59) 5/8 x 3/8 OD compression coupling sku: 04-330, ($3.09)
  • 04-128.jpg
    1/4 OD compression x 1/8 male sku: 04-105, ($1.10) 1/4 OD compression x 1/4 male, lead free sku: 04-106, ($1.27) 3/8 OD compression x 1/8 male sku: 04-125, ($1.18) 3/8 OD compression x 1/4 male sku: 04-126, ($1.50) 3/8 OD compression x 3/8 male, lead free sku: 04-127, ($1.87) 3/8 OD compression x 1/2 male, lead free sku: 04-128, ($2.62) 1/2 OD compression x 1/4 male sku: 04-145, ($1.85) 1/2 OD compression x 3/8 male, lead free sku: 04-146, ($2.18) 1/2 OD compression x 1/2 male sku: 04-147, ($2.92) 5/8 OD compression x 3/8 male sku: 04-165, ($2.58) 5/8 OD compression x 1/2 male sku: 04-166, ($3.11) 7/8 OD compression x 3/4 male sku: 04-185, ($5.13)
  • 04-246.jpg
    3/8 OD compression x 1/4 female sku: 04-225, ($1.73) 3/8 OD compression x 3/8 female sku: 04-226, ($1.73) 3/8 OD compression x 1/2 female sku: 04-227, ($2.21) 1/2 OD compression x 1/2 female sku: 04-246, ($2.64) 5/8 OD compression x 1/2 female sku: 04-247, ($3.09)
  • 04-411.jpg
    3/8 OD compression 90 ell sku: 04-407, ($2.40) 1/2 OD compression 90 ell sku: 04-409, ($3.72) 5/8 OD compression 90 ell sku: 04-411, ($5.22)
  • 04-446.jpg
    1/4 OD compression x 1/8 male ell, lead free sku: 04-425, ($1.57) 3/8 OD compression x 1/4 male ell, lead free sku: 04-445, ($2.13) 3/8 OD compression x 3/8 male ell sku: 04-446, ($2.10) 3/8 OD compression x 1/2 male ell sku: 04-447, ($2.84)
  • 04-511.jpg
    1/4 OD compression tee sku: 04-505, ($2.28) 3/8 OD compression tee sku: 04-507, ($3.56) 1/2 OD compression tee sku: 04-509, ($5.33) 5/8 OD compression tee, lead free sku: 04-511, ($9.16)
  • 375OD-compressionx50copper
    3/8 OD compression x 1/2 copper$2.23
    sku: 04-625
    Qty:
  • 04-807.jpg
    1/4 OD compression shut off valve sku: 04-805, ($5.48) 3/8 OD compression shut off valve sku: 04-807, ($6.43)