HOLEDALL INTERNAL EXPANSION COUPLINGS
BRASS & STAINLESS STEEL SCOVILL STYLE

Internally Expanded Permanent Couplings - Scovill Style

Brass internally expanded permanent couplings are recommended for low pressure discharge and suction service. Commonly used in the transfer of fuel in industry to homes, airplanes, ships, etc. The working pressure of the 520-H fitting varies with the size of the fitting, the size and construction of the hose and the media being conveyed. Consult the Tampa Rubber Customer Service Department for recommendations.
 
Both the male and female have octagonal facets for tightening with a wrench. The female in 1-½" and larger sizes has special lugs for tightening. Couplings grip hose firmly over a broad area to provide a permanent, trouble-free assembly. The stem is expanded to the nominal I. D. of the hose for a rigid, uniform, full-flow area.
  • Male and female stems are machined from bar stock or solid brass forgings; ferrules are available in brass and stainless steel.
  • Hand and electrically operated installation equipment is available. Consult the Tampa Rubber Customer Service Department for pricing and availability.
  • Couplings are compact, light and streamlined to eliminate catching on curbs and shrubs.

Internal Expansion Male Pipe EndInternal Expansion Female EndInternal Expansion Grooved End
520-H Series
Male		520-H Series
Female		520-G Series
Grooved Type
Part #Hose Size
H51923/4"
H5212-A1"
H5222-A1-1/4"
*H5272*1-3/8"
H5232-A1-1/2"
H52422"
H52522-1/2"
H52623"
H52824"
Part #Hose Size
H5191-BU3/4"
H5211-A-BU1"
H5221-A-BU1-1/4"
*H5271*1-3/8"
H5231-A-BU1-1/2"
H52412"
H52512-1/2"
H52613"
H52814"
Part #Hose Size
G52121"
G52321-1/2"
G52422"
**G52522-1/2"

** 2-1/2" Grooved couplings will be discontinued as stock is depleted.
All 520-H Series Male Couplings have standard NPT threads.
*1-3/8" stem has 1-1/2" thread.		Sizes 3/4" to 2" have standard NPSH threads;
Sizes 2-1/2" to 4" have standard NPSM threads.
*1-3/8" stem has 1-1/2" thread.		 
Male NST Thread
Part #Hose Size
H5212NST1"
H5232NST1-1/2"
Female NST Thread
Part #Hose Size
H5211NST1"
H5231NST1-1/2"
 


520-H Brass Ferrules

A wide range of 520-H Scovill type ferrules permits a perfect assembly of a coupling to a corresponding size of hose within commercial tolerances regardless of wall thickness. Eliminates the need for a large stock of coupling bodies. Stainless steel ferrules are available. Consult the Tampa Rubber Customer Service Department for stainless ferrules and for hose O. D.'s other than those listed.Brass Scovill Ferrule
Brass Scovill Style Ferrules
Part
Number		Hose
I.D.		Hose O.D. Range
From:To:
R75AAS3/4"1-8/64"1-11/64"
R75AS1-12/64"1-14/64"
R75BS1-15/64"1-17/64"
R75CS1-18/64"1-20/64"
R1AAAS-A1"1-24/64"1-26/64"
R1AAS-A1-27/64"1-29/64"
R1AS-A1-30/64"1-32/64"
R1BS-A1-33/64"1-35/64"
R1CS1-36/64"1-38/64"
R1DS1-39/64"1-41/64"
R1ES-A1-42/64"1-44/64"
R125AAS1-1/4"1-39/64"1-42/64"
R125AS-A1-43/64"1-46/64"
R125BS-A1-47/64"1-50/64"
R125CS-A1-51/64"1-54/64"
R125DS1-55/64"1-58/64"
R125ES1-59/64"1-62/64"
R1375BS1-3/8"1-47/64"1-50/64"
R1375CS1-51/64"1-54/64"
R1375DS1-55/64"1-58/64"
R1375ES1-59/64"1-62/64"
R15AAAS-A1-1/2"1-54/64"1-57/64"
R15AAS-A1-58/64"1-62/64"
R15AS-A1-63/64"2-2/64"
R15BS-A2-3/64"2-6/64"
R15CS2-7/64"2-11/64"
R15DS-A2-12/64"2-14/64"
R15ES2-15/64"2-19/64"
R15FS2-20/64"2-24/64"
R15GS2-25/64"2-28/64"
Part
Number		Hose
I.D.		Hose O.D. Range
From:To:
R2AAS2"2-27/64"2-30/64"
R2AS2-31/64"2-34/64"
R2BS2-35/64"2-38/64"
R2CS2-39/64"2-42/64"
R2DS2-43/64"2-46/64"
R2E2-47/64"2-50/64"
R2FS2-51/64"2-54/64"
R25AS2-1/2"2-62/64"3-1/64"
R25BS3-2/64"3-6/64"
R25CS3-7/64"3-11/64"
R25DS3-12/64"3-16/64"
R25ES3-17/64"3-21/64"
R25FS3-22/64"3-26/64"
R3AAAS3"3-30/64"3-34/64"
R3AAS3-35/64"3-39/64"
R3AS3-40/64"3-45/64"
R3BS3-46/64"3-50/64"
R3CS3-51/64"3-54/64"
R4AAAS4"4-35/64"4-36/64"
R4AAS4-37/64"4-38/64"
R4AS4-39/64"4-40/64"
R4BS4-41/64"4-42/64"
R4CS4-43/64"4-44/64"
R4DS4-45/64"4-46/64"
R4ES4-47/64"4-48/64"
R4FS4-49/64"4-50/64"
R4GS4-51/64"4-52/64"
R4HS4-53/64"4-54/64"
1", 1-1/4" & 1-1/2" ferrules will be replaced by API ferrules below as inventory is depleted.


 

Replacement Washers

These are replacement washers for the 520-H female Internally Expanded permanent couplings and the Dubl-Grip female reattachables.Scovill Replacement Washers
Replacement Washers
Part NumberSize
NeopreneBuna-N
H5071H5071-BU3/4"
H5072H5072-BU1"
H5073H5073-BU1-1/4"
H5074H5074-BU1-1/2"
Part NumberSize
NeopreneBuna-N
H5075H5075-BU2"
H5076H5076-BU2-1/2"
H5077H5077-BU3"
H5078H5078-BU4"


API Certified Brass Permanently Attached Petroleum Couplings

The following fittings have been tested and are compliant with API 1529 5th edition. Coupling procedures, ferrule recommendations and API test data are available upon request. Please contact the Tampa Rubber Customer Service Department.
API Permanently Attached Male Pipe EndAPI Permanently Attached Female Pipe End
520-H Series
Male		520-H Series
Female
Part #Hose Size
H5212-A1"
H5222-A1-1/4"
H5232-A1-1/2"
H5242L-A2"
H5252L-A2-1/2"
H5262L-A3"
Part #Hose Size
H5211-A-BU1"
H5221-A-BU1-1/4"
H5231-A-BU1-1/2"
H5241L-A-BU2"
H5251L-A-BU2-1/2"
H5261L-A-BU3"
All 520-H Series Male Couplings have standard NPT threads.Sizes 1" to 2" have standard NPSH threads;
Sizes 2-1/2" to 3" have standard NPSM threads.

520-H Ferrules
for API Couplings

Ferrules are brass in the 1", 1-1/4" and 1-1/2" sizes. Ferrules are stainless steel in the 2", 2-1/2" and 3" sizes.Brass Scovill Ferrule
520-H API Ferrules
Brass
Part
Number		Hose
I.D.		Hose O.D. Range
From:To:
R1AAAS-A1"1-24/64"1-26/64"
R1AAS-A1-27/64"1-29/64"
R1AS-A1-30/64"1-32/64"
R1BS-A1-33/64"1-35/64"
R1CS-A1-36/64"1-38/64"
R1DS-A1-39/64"1-41/64"
R1ES-A1-42/64"1-44/64"
R125AAS-A1-1/4"1-39/64"1-42/64"
R125AS-A1-43/64"1-46/64"
R125BS-A1-47/64"1-50/64"
R125CS-A1-51/64"1-54/64"
R125DS-A1-55/64"1-58/64"
R125ES-A1-59/64"1-62/64"
R15AAAS-A1-1/2"1-54/64"1-57/64"
R15AAS-A1-58/64"1-62/64"
R15AS-A1-63/64"2-2/64"
R15BS-A2-3/64"2-6/64"
R15CS-A2-7/64"2-11/64"
R15DS-A2-12/64"2-14/64"
R15ES-A2-15/64"2-19/64"
  
Stainless Steel
Part
Number		Hose
I.D.		Hose O.D. Range
From:To:
R2ASS-A2"2-31/64"2-34/64"
R2BSS-A2-35/64"2-38/64"
R2CSS-A2-39/64"2-42/64"
R2DSS-A2-43/64"2-46/64"
R2ESS-A2-47/64"2-50/64"
R25ASS-A2-1/2"2-62/64"3-1/64"
R25BSS-A3-2/64"3-6/64"
R25CSS-A3-7/64"3-11/64"
R25DSS-A3-12/64"3-16/64"
R25ESS-A3-17/64"3-21/64"
R3AASS-A3"3-35/64"3-39/64"
R3ASS-A3-40/64"3-45/64"
R3BSS-A3-46/64"3-50/64"
R3CSS-A3-51/64"3-54/64"
R3DSS-A3-55/64"3-59/64"


Permanent Couplings for Pump Hose

These couplings are the most economical and trouble-free couplings for gas pump hose. Serrations on the stem become imbedded in the hose, eliminating wicking and leakage. The shell extends beyond the stem to prevent cutting of the interior walls. The tapered ends of the stem and shell protect the hose when flexed.Permanent Coupling for Pump Hose
  • Couplings provide tamper-proof static connection which cannot be broken without completely damaging coupling and hose.
  • Internal expansion of stem to nominal I.D. of hose provides full flow.
  • Broad, firm grip of coupling extends hose life by making it possible for hose to withstand more flexings.
  • Hand and electrically operated installation equipment is available; consult the Tampa Rubber Customer Service Department for pricing and availability.
  • Caution: Reattach the static wire, if required.
Permanent Coupling for Pump Hose
Chrome Plated Brass
Part NumberHose I.D.NPT MaleHose O.D.
H57415/8"3/4"1"
H57425/8"3/4"1-1/32"
H57513/4"3/4"1-9/64"
H57523/4"3/4"1-11/64"
H57533/4"3/4"1-13/64"
H57543/4"3/4"1-7/32"
H5755*3/4"3/4"1-17/64"
H57711"1"1-25/64"
H57721"1"1-29/64"
H57731"1"1-1/2"
H57741"1"1-9/16"
* Thrust Plate required: (#25000HTL15).


 

Coupling Expander Machines

H Expander

  • Hand operated, pull through type expander.
  • For use in a fixed location for small production runs.
  • Attaches all sizes of 520-H, 570-H & 580-H series couplings.
  • Note: Expander tooling sold separately.
"H" Coupling Expander

Part # 25000H0000

HB Expander

  • Hand operated, pull through type expander.
  • For use in a fixed location for small production runs or as a portable repair type expander.
  • Attaches ¾" through 2" 520-H couplings, and all sizes of 570-H and 580-H series couplings.
  • Note: Expander tooling sold separately.
"HB" Coupling Expander

Part # 25000HB0000

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