Screw Thread Inserts (STI) info page

explanation of Newman Tools, Heli-Coil®, and Recoil® Part Numbers

 

 General Description | Product Listing | questions to ask | Competitors( interference) | complimentary products |  tips

 

THREAD REPAIR KITS

Recoil Thread Repair Kits contain a quality HSS tap, installation tool, precision stainless steel inserts and instructions, in a sturdy reusable container. Recoil has a full range of problem solving repair kits, available in single or multiple size format.

 

Screw thread inserts

available in inch size # 2 to 1-1/2", Metric 2mm to 42mm , 8 TPI thread per inch from 1-1/8" to 2"

link to our recoil page

for repairing internal thread to original size. Stronger than the original thread. Inserts are made of 18-8 (304) stainless steel.

Specials are available made in Inconel for High temperature applications.

common brand names:       Recoil®,     Heli-coil®

MS specs

 


Questions to ask

1.what is the size required. This is the size of bolt to be put into the repaired hole

2. length of thread insert ( maximum is 3 times the diameter of the bolt)


Newman Tools Part Numbers

 Newman Part Number  example  description  additional info
STK"size"  STK1/4-20 Kits, include STI tap, installation tools and package of inserts  length of insert is 1.5 x diameter
STR"size"  STR1/4-20 Refill Pack, inserts replacement for the STK  length insert is 1.5 x diameter
STRM"size"  STRM6X1 Metric refill pack, inserts replacement for the STKM  length insert is 1.5 x diameter
 STKS?????  STKS33004 range kits include various sizes  length insert is 1.5 x diameter
 STT"size".2  STT1/4-20.2  Taps ( STI) Plug  these are special oversized taps to create the hole for the inserts
 STT"size".3  STT1/4-20.3  Taps ( STI)Bottoming  these are special oversized taps to create the hole for the inserts
 STT"size"SP  STT1/4-20SP  Taps ( STI)Spiral pointed  these are special oversized taps to create the hole for the inserts
 STT"size"QS  STT1/4-20QS  Taps ( STI)Spiral Fluted  these are special oversized taps to create the hole for the inserts
STTM"size"-2  STTM6X1-2 Metric Taps (STI) plug style  these are special oversized taps to create the hole for the inserts
STTM"size"-3  STTM6X1-3 Metric Taps (STI) Bottoming style  these are special oversized taps to create the hole for the inserts
STTM"size"SP  STTM6X1SP Metric Taps (STI) Spiral Pointed  these are special oversized taps to create the hole for the inserts
STTM"size"QS  STTM6X1QS Metric Taps (STI)Spiral fluted  these are special oversized taps to create the hole for the inserts
 ST"size"x"length"

ST1/4-20X0250

ST1/4-20X0375

ST1/4-20X0500

ST1/4-20X0625

ST1/4-20X0750

inserts ( free running)

NC, NF, x length

standard length is 1.5 times diameter

lengths are 1, 1.5, 2, 2.5 , 3 times diameter

NC meets MS Spec

NF are not to MS Specs ( only for free running )

 STM"size"x"length"

STM6X1X6.0

STM6X1X9.0

STM6X1X12.0

STM6X1X15.0 

STM6X1X18.0

 metric inserts ( free running)

 x length

standard length is 1.5 times diameter

lengths are 1, 1.5, 2, 2.5 , 3 times diameter

 STL"size"x"length"

 STL1/4-20X0250

STL1/4-20X0375

STL1/4-20X0500

STL1/4-20X0625

STL1/4-20X0750

inserts ( screw-locking )

 NC, NF, x length

standard length is 1.5 times diameter

other lengths are 1, 1.5, 2, 2.5 , 3 times diameter

meets MS Spec

 STLM"size"x"length"

 STLM6X1X6.0

STLM6X1X9.0

STLM6X1X12.0

STLM6X1X15.0 

STLM6X1X18.0

 metric inserts (screw- locking )

 x length

standard length is 1.5 times diameter

other lengths are 1, 1.5, 2, 2.5 , 3 times diameter

Meets MS Spec

 STIT"size"  STIT50250 installation tool use for Recoil free running inserts, not for helicoil brand name
 STITPW"size"  STITPW1/4-20 installation tool prewinder type

must be used for screwlocking inserts,

can also be used for free running inserts but are more expensive than the STIT tools

 STSF"size" STSF1/4-20X0375 strip feed inserts 1000 inserts per roll
 STTB"size" STTB1/4 tang break off tool  


Heli-Coil® part numbers

 

1185-4CNY0375S

eg 1/4-20 x 375 Free running inset cadmium Plated on strip feed

 

 1185  - 4 CN Y 0375 S
             
 Type   Size designation material finish length Packaging
 1185  Free Running ,UNC see chart

CN= Stainless steel

 BN=Phosphor Bronze

TN=Inconel X

 Blank=None

Y= Cadium

V-Silver

W= dry Film lubricant

 

 Blank= Bulk

S=Strip Feed

 1191 Free Running, UNF
3585 Screw-Lock UNC
3591 Screw-Lock UNF

 

 

helicoil part numbers  newman part numbers  description  additional info

5401 ( NC)

5402( NF)

STK"size" Kits  standard length insert is 1.5 x diameter

R1185 (NC)

R1191 ( NF )

STR"size" Refill Pack, inserts replacement for the STK  standard length insert is 1.5 x diameter
R1084 STRM"size" Metric refill pack, inserts replacement for the STKM  standard length insert is 1.5 x diameter

 #CPB

#CBB

 STT"size"  Taps ( STI)  these are special oversized taps to create the hole for the inserts
2087 STTM"size" Metric Taps (STI)  these are special oversized taps to create the hole for the inserts

 1185-#x"length" NC

1191-#x"length" NF

 ST"size"x"length" inserts ( free running)

NC, NF, x length

standard length is 1.5 times diameter

other lengths are 1, 1.5, 2, 2.5 , 3 times diameter

 1084"size"x"length"  STM"size"x"length"  metric inserts ( free running)

 x length

standard length is 1.5 times diameter

other lengths are 1, 1.5, 2, 2.5 , 3 times diameter

 3585"size"x"length" NC

3591"size"x"length" NF

 STL"size"x"length" inserts ( screw-locking )

 NC, NF, x length

standard length is 1.5 times diameter

other lengths are 1, 1.5, 2, 2.5 , 3 times diameter

 4184"size"x"length"  STLM"size"x"length"  metric inserts (screw- locking )

 x length

standard length is 1.5 times diameter

other lengths are 1, 1.5, 2, 2.5 , 3 times diameter

 2087"size"  STIT"size" installation tool use for Recoil free running inserts, not for helicoil brand name
 7751"size"  STITPW"size" installation tool prewinder type

must be used for screwlocking inserts,

can also be used for free running inserts but are more expensive than the STIT tools

 4190  8TPI inserts  
       


helicoil size chart

 

   NC NF
     
 02  2-56  
 03 3-56  
 04 4-40 4-48
 05 5-40 5-44
 06 6-32 6-40
 2 8-32 8-36
 3 10-24 10-32
 1  12-24  
 4 1/4-20 1/4-28
5 5/16-18 5/16-24
6 3/8-16 3/8-24
7 7/16-14 7/16-20
8 1/2-13 1/2-20
9 9/16-12 9/16-18
10 5/8-11 5/8-18
12 3/4-10 3/4-16
14 7/8-9 7/8-14
16 1-8  1-14
161   1-12
18  1-1/8x7  1-1/8x12
20 1.1/4-7 1.1/4-12
 22 1.3/8-6 1.3/8-12
 24 1.1/2 x 6 1.1/2 x 12
     


Recoil Part Numbers

 

05082XAG

eg free running M8 x 1.25 x 1D inconel X750 Silver plated insert

 

 First Digit=Category Second digit= Thread Type third digit and four digit= thread diameter fifth Digit=insert length in 1/2 diameters special suffixes

 0 = inserts bulk free-running

1=inserts bulk self locking

2 inserts packets (free-running only )

 0= BSF, BA

1= BSP

2=BSW

3=UNC

4=UNF, UNEF, UNS, etc

5= Metric coarse

6= NPT, BSC, 8UN

7=Metric fine

8=Metric fine & Spark Plug

 

0= size in 1/16" ( ie 08=1/2")

1= size in 1/16" ( ie 08=1/2")

2= size in 1/16" ( ie 08=1/2")

3= size in 1/16" ( ie 08=1/2")

4= size in 1/16" ( ie 08=1/2")

5= size in 1mm ( ie 08=8mm)

6= size in 1/16" ( ie 08=1/2")

7= size in 1mm ( ie 08=8mm)

8= size in 1mm ( ie 08=8mm)

 

 2=1D

3=1.5D

4=2D

5=2.5D

6=3D

AG=Silver plated

C=Cadium Plated

D- Dry film Lubrication

LH-Left Hand

PB= Phosfor Bronze

SF- Strip Feed

X- inconel x 750

Y=316 Stainless steel

3= Kits        
 4= Taps

0 = BSF, BA

1= BSP

2=BSW

3=UNC

4=UNF, UNEF, UNS, etc

5= Metric coarse

6= NPT, BSC, 8UN

7=Metric fine

8=Metric fine & Spark Plug

 0= size in 1/16" ( ie 08=1/2")

1= size in 1/16" ( ie 08=1/2")

2= size in 1/16" ( ie 08=1/2")

3= size in 1/16" ( ie 08=1/2")

4= size in 1/16" ( ie 08=1/2")

5= size in 1mm ( ie 08=8mm)

6= size in 1/16" ( ie 08=1/2")

7= size in 1mm ( ie 08=8mm)

8= size in 1mm ( ie 08=8mm)

 4=taper

5= plug

6=bottoming

7= pilot nose

8= spiral point

9=spiral flute

 
 5= Tools        

link to recoil page

link to recoil technical catalogue

 


MS specs ( Military Standard)

U.S. Standards

MS 122076 Series, Insert, corrosion resistant. Helical coil, coarse thread.( ST NC do conform to MS specs)
MS 124651 Series, Insert, corrosion resistant. Helical coil, fine thread.(ST NF do not conform to MS specs)
MS 21209 Series, Insert, screw thread, screw locking.( STL )
MIL-1-8846 C, Insert, screw thread. Helical coil.
MA 3329, 3330, 3331, Metric screw locking series.( STLM)
MA 3279, 3280, 3281, Metric free running series. (STM)




Complimentary Products

drills,  deburring tools,  Trefolex cutting paste,    tap-wrenches,     screw pitch gauge

 


Tips

1.don't put thread sealant ( loctite) on the insert . This interferes with the spring action of the insert and then the insert does not remain in the hole.

2. to determine length of insert. It is determined by number of coils

 


 Copyright (c) Newman Tools Inc.

 

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we try to ship to the world largest cities Tokyo,Japan, Seoul, South Korea, Mexico City, Mexico , New York City, USA , Mumbai, India , Jakarta, Indonesia , Sáo Paulo, Brazil, Delhi, India , Osaka/Kobe, Japan , Shanghai, China , Manila, Philippines ,Los Angeles, USA ,Calcutta, India , Moscow, Russian Fed., Cairo, Egypt, Lagos, Nigeria, Buenos Aires, Argentina , London, United Kingdom , Beijing, China , Karachi, Pakistan , Dhaka, Bangladesh , Rio de Janeiro, Brazil ,Tianjin, China , Paris, France , Istanbul, Turkey , Lima, Peru , Tehrãn, Iran, Bangkok, Thailand , Chicago, USA , Bogotá, Colombia , Hyderabad, India , Chennai, India , Essen, Germany , Ho Chi Minh City, Vietnam , Hangzhou, China , Hong Kong, China , Lahore, Pakistan , Shenyang, China , Changchun, China , Bangalore, India , Harbin, China , Chengdu, China , Santiago, Chile ,Guangzhou, China , St. Petersburg, Russian Fed , Kinshasa, DRC , Baghdãd, Iraq , Jinan, China , Houston, USA , Toronto, Canada, Yangon, Myanmar (Burma), Alger, Algeria Philadelphia, USA, Qingdao, China , Milano, Italy , Pusan, South Korea, Belo Horizonte, Brazil, Almadabad, India , Madrid, Spain , San Francisco, USA, Alexandria, Egypt , Washington DC, USA , Wuhan, China , Dallas, USA , Guadalajara, Mexico, Chongging, China , Medellin, Colombia, Detroit, USA , Handan, China , Frankfurt, Germany , Porto Alegre, Brazil , Hanoi, Vietnam , Sydney, Australia, Santo Domingo, Dom. Rep., Singapore, Singapore , Casablanca, Morocco , Katowice, Poland , Pune, India , Bangdung, Indonesia, Monterrey, Mexico ,Montréal, Canada , Nagoya, Japan , Nanjing, China , Abidjan, Côte d'Ivoire, Xi'an, China , Berlin, Germany , Riyadh, Saudi Arabia, Recife, Brazil , Dusseldorf, Germany, Ankara, Turkey , Melbourne, Australia, Salvador, Brazil , Dalian, China , Caracas, Venezuela, Adis Abeba, Ethiopia, Athina, Greece, Cape Town, South Africa, Koln, Germany , Maputo, Mozambique, Napoli, Italy