DOC AIRBUS | AMM A320FSPOP 415 - Installation of Helical Coil Threaded Inserts [PW11]
TASK 70-24-00-910-803-A
SPOP 415 - Installation of Helical Coil Threaded Inserts
Use this procedure to replace helical coil threaded inserts (tanged or Tangless (R)) or to repair damage to threads unless specified differently.
A. Referenced Information
3. Job Set-up
Subtask 70-24-00-860-062-A ** ON A/C NOT FOR ALL
Subtask 70-24-00-911-059-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:20:09 UTC
SPOP 415 - Installation of Helical Coil Threaded Inserts
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobUse this procedure to replace helical coil threaded inserts (tanged or Tangless (R)) or to repair damage to threads unless specified differently.
NOTE: Always obey the specific procedures and limits in the specific maintenance manual maintenance tasks.
2. Job Set-up InformationA. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-28-00-910-803-A | SPOP 42 - Chromate Conversion Coating of Aluminum |
Helical Coil Threaded InsertSubtask 70-24-00-860-062-A ** ON A/C NOT FOR ALL
A. Not Applicable
4. ProcedureSubtask 70-24-00-911-059-A ** ON A/C NOT FOR ALL
A. General Information
(2) Double helical coil threaded inserts are available for threads that have damage more than the limits of standard helical coil threaded insert specifications.
(3) Helical coil threaded inserts are available in all standard sizes in National Fine and National Course Series up to 1.50 in. (38.10 mm) size, as well as eight pitch threads, metric threads and tapered pipe threads.
(4) Oversized helical coil threaded inserts can be used if the minimum wall thickness is kept.
(5) Tangless inserts have advantages when compared to tanged inserts.
(a) Tangless inserts do not have tangs to remove and discard, and this helps prevent possible Foreign Object Damage (FOD).
(b) Tangless inserts can decrease the time necessary for installation of threaded inserts.
(6) Equipment and materials
50 Shelton Technology Center
P. O. Box 859
Shelton, CT 06484 USA
www.helicoil.com or www.emhart.com
Tel: 1-203-924-9341
Fax: 1-203-925-3109
KATO Fastening Systems, Inc.
Subsidiary of ADVANEX, Inc.
11836 Fishing Point Drive - Suite 400
Newport News, VA 23606 USA
www.katonet.com
Tel: 1-757-783-8980
Fax: 1-757-873-4920
(7) The sources listed above make available these items:
(a) Standard tools to use for helical coil removal and installation
(b) Operation instructions and procedures for the above tools
(c) Installation instructions that give part numbers for the applicable helical coil threaded inserts.
Subtask 70-24-00-910-063-A ** ON A/C NOT FOR ALL NOTE: Tangless (R) is a registered trademark of ADVANEX, Inc. for helical coil threaded inserts that do not have tangs.
(1) Helical coil threaded inserts are used in initial part manufacture, which is typical for parts made of aluminum, and to repair damage to threads. (2) Double helical coil threaded inserts are available for threads that have damage more than the limits of standard helical coil threaded insert specifications.
(3) Helical coil threaded inserts are available in all standard sizes in National Fine and National Course Series up to 1.50 in. (38.10 mm) size, as well as eight pitch threads, metric threads and tapered pipe threads.
(4) Oversized helical coil threaded inserts can be used if the minimum wall thickness is kept.
(5) Tangless inserts have advantages when compared to tanged inserts.
(a) Tangless inserts do not have tangs to remove and discard, and this helps prevent possible Foreign Object Damage (FOD).
(b) Tangless inserts can decrease the time necessary for installation of threaded inserts.
(6) Equipment and materials
NOTE: Other sources are permitted.
Emhart Teknologies, Industrial Div. 50 Shelton Technology Center
P. O. Box 859
Shelton, CT 06484 USA
www.helicoil.com or www.emhart.com
Tel: 1-203-924-9341
Fax: 1-203-925-3109
KATO Fastening Systems, Inc.
Subsidiary of ADVANEX, Inc.
11836 Fishing Point Drive - Suite 400
Newport News, VA 23606 USA
www.katonet.com
Tel: 1-757-783-8980
Fax: 1-757-873-4920
(7) The sources listed above make available these items:
(a) Standard tools to use for helical coil removal and installation
(b) Operation instructions and procedures for the above tools
(c) Installation instructions that give part numbers for the applicable helical coil threaded inserts.
B. Installation of Helical Coil Threaded Inserts
(1) To replace helical coil threaded inserts that were installed during the initial manufacture of the part, do the steps that follow:
(a) Remove the helical coil threaded insert. Refer to the manufacturer's instructions.
(b) To find the correct size of the new insert, compare the new insert specifications with the initial finished thread hole size. Use the manufacturer's installation instructions as an aid in the correct insert selection.
1 For applications up to 800 deg.F (427 deg.C), use stainless steel (AMS 7245) inserts.
2 For applications 800 deg.F (427 deg.C) - 1000 deg.F (538 deg.C), use INCONEL X-750 (AMS 7246) inserts.
3 For aluminum parts, apply a protective coat to the insert hole and other areas where it is possible that the coat was removed. Refer to Anodize Touch-Up (SPOP 42) (Ref. AMM TASK 70-28-00-910-803).
4 Install the new helical coil threaded insert 0.75 - 1.5 pitch below the top surface. Refer to the manufacturer's instructions.
5 Break off the installation tang at the notch.
(2) To replace helical coil threaded inserts that were installed to repair damage to threads, do the subsequent steps:
(a) To find the correct size of the new insert, compare the new insert specifications with the initial finished thread hole size. Use the manufacturer's installation instructions as an aid in the correct insert selection.
1 For applications up to 800 deg.F (427 deg.C), use stainless steel (AMS 7245) inserts.
2 For applications 800 deg.F (427 deg.C) - 1000 deg.F (538 deg.C), use INCONEL X-750 (AMS 7246) inserts.
(b) Make sure that there is a sufficient wall thickness.
(c) A sufficient wall thickness is necessary for the repair of damage to thread holes with helical coil inserts.
(d) Drill and tap hole to the correct size. Refer to the manufacturer's instructions.
(e) For aluminum parts, apply a protective coat to the insert hole and other areas where it is possible that the coat was removed. Refer to Anodize Touch-Up (SPOP 42) (Ref. AMM TASK 70-28-00-910-803).
(f) Install the new helical coil threaded insert 0.75 - 1.5 pitch below the top surface. Refer to the manufacturer's instructions.
(g) Break off the installation tang at the notch.
(3) When it is necessary to use a double helical coil threaded insert to repair threads that have damage more than the limits of standard helical coil threaded insert specifications, do the subsequent steps:
(a) To find the correct size of the new insert, compare the new insert specifications with the initial finished thread hole size. Use the manufacturer's installation instructions as an aid in the correct insert selection.
1 For applications up to 800 deg.F (427 deg.C), use stainless steel (AMS 7245) inserts.
2 For applications 800 deg.F (427 deg.C) - 1000 deg.F (538 deg.C), use INCONEL X-750 (AMS 7246) inserts.
(b) Make sure that there is a sufficient wall thickness.
(c) A sufficient wall thickness is necessary for the repair of damage to thread holes with double threaded helical coil threaded inserts.
(d) Drill and tap hole to the correct size. Refer to the manufacturer's instructions.
(e) For aluminum parts, apply a protective coat to the insert hole and other areas where it is possible that the coat was removed. Refer to Anodize Touch-Up (SPOP 42) (Ref. AMM TASK 70-28-00-910-803).
(f) Install the double helical coil threaded insert. Refer to the manufacturer's instructions.
1 Install the outer insert by the applicable subsequent step:
a For tapped holes without countersink, 0.25 - 0.5 pitch below the top surface
b For holes with a countersink, 1.0 - 1.5 pitch below the top surface.
2 Install the inner insert so that the end of the last coil is flush with the end of the outer insert.
(g) Break off the installation tang at the notch.
(4) It is recommended that inserts should not be used in through holes due to leak possibility. If an insert is used in a through-hole, use an applicable sealant at the bolt head interface to block any possible leak path.
(1) To replace helical coil threaded inserts that were installed during the initial manufacture of the part, do the steps that follow:
(a) Remove the helical coil threaded insert. Refer to the manufacturer's instructions.
(b) To find the correct size of the new insert, compare the new insert specifications with the initial finished thread hole size. Use the manufacturer's installation instructions as an aid in the correct insert selection.
1 For applications up to 800 deg.F (427 deg.C), use stainless steel (AMS 7245) inserts.
2 For applications 800 deg.F (427 deg.C) - 1000 deg.F (538 deg.C), use INCONEL X-750 (AMS 7246) inserts.
3 For aluminum parts, apply a protective coat to the insert hole and other areas where it is possible that the coat was removed. Refer to Anodize Touch-Up (SPOP 42) (Ref. AMM TASK 70-28-00-910-803).
4 Install the new helical coil threaded insert 0.75 - 1.5 pitch below the top surface. Refer to the manufacturer's instructions.
5 Break off the installation tang at the notch.
NOTE: If a tangless insert is used, this step is not applicable.
6 Collect and remove all broken tangs so that there are none remaining with the part. (2) To replace helical coil threaded inserts that were installed to repair damage to threads, do the subsequent steps:
(a) To find the correct size of the new insert, compare the new insert specifications with the initial finished thread hole size. Use the manufacturer's installation instructions as an aid in the correct insert selection.
1 For applications up to 800 deg.F (427 deg.C), use stainless steel (AMS 7245) inserts.
2 For applications 800 deg.F (427 deg.C) - 1000 deg.F (538 deg.C), use INCONEL X-750 (AMS 7246) inserts.
(b) Make sure that there is a sufficient wall thickness.
(c) A sufficient wall thickness is necessary for the repair of damage to thread holes with helical coil inserts.
(d) Drill and tap hole to the correct size. Refer to the manufacturer's instructions.
(e) For aluminum parts, apply a protective coat to the insert hole and other areas where it is possible that the coat was removed. Refer to Anodize Touch-Up (SPOP 42) (Ref. AMM TASK 70-28-00-910-803).
(f) Install the new helical coil threaded insert 0.75 - 1.5 pitch below the top surface. Refer to the manufacturer's instructions.
(g) Break off the installation tang at the notch.
NOTE: If a tangless insert is used, this step is not applicable.
(h) Collect and remove all broken tangs so that there are none remaining with the part. (3) When it is necessary to use a double helical coil threaded insert to repair threads that have damage more than the limits of standard helical coil threaded insert specifications, do the subsequent steps:
(a) To find the correct size of the new insert, compare the new insert specifications with the initial finished thread hole size. Use the manufacturer's installation instructions as an aid in the correct insert selection.
1 For applications up to 800 deg.F (427 deg.C), use stainless steel (AMS 7245) inserts.
2 For applications 800 deg.F (427 deg.C) - 1000 deg.F (538 deg.C), use INCONEL X-750 (AMS 7246) inserts.
(b) Make sure that there is a sufficient wall thickness.
(c) A sufficient wall thickness is necessary for the repair of damage to thread holes with double threaded helical coil threaded inserts.
(d) Drill and tap hole to the correct size. Refer to the manufacturer's instructions.
(e) For aluminum parts, apply a protective coat to the insert hole and other areas where it is possible that the coat was removed. Refer to Anodize Touch-Up (SPOP 42) (Ref. AMM TASK 70-28-00-910-803).
(f) Install the double helical coil threaded insert. Refer to the manufacturer's instructions.
1 Install the outer insert by the applicable subsequent step:
a For tapped holes without countersink, 0.25 - 0.5 pitch below the top surface
b For holes with a countersink, 1.0 - 1.5 pitch below the top surface.
2 Install the inner insert so that the end of the last coil is flush with the end of the outer insert.
(g) Break off the installation tang at the notch.
NOTE: If a tangless insert is used, this step is not applicable.
(h) Collect and remove all broken tangs so that there are none remaining with the part. (4) It is recommended that inserts should not be used in through holes due to leak possibility. If an insert is used in a through-hole, use an applicable sealant at the bolt head interface to block any possible leak path.