3/8-16 ID x 1/2-13 OD stainless threaded insert 3/4" long
Close
Login to Your Account
Likes Likes:  0
Results 1 to 8 of 8
  1. #1
    Join Date
    Jun 2018
    Country
    UNITED STATES
    State/Province
    Illinois
    Posts
    26
    Post Thanks / Like
    Likes (Given)
    11
    Likes (Received)
    0

    Default 3/8-16 ID x 1/2-13 OD stainless threaded insert 3/4" long

    3/8-16 ID x 1/2-13 OD stainless threaded insert 3/4" long plus or minus 1/16 or so

    Does anybody sell one? I have been searching for 2 days and haven't found one. I think I need to go the full depth as the top of the cast aluminum comes to a small block about 1/2" thick the meatier part of the block is just below that.

    The original hole is 1-1/8" deep and threaded as far as it could be.

    I do not want to go with a bigger OD insert because I fear it would be too big.

    I am thinking about trying to drill and tap a 1/2-13 stainless bolt.

    Can an N bit be used for a 3/8-16 tap bit?

    I do not have a 7.7mm and was trying to use the smallest bit that would still allow the tap to work.

    Any advice would be greatly appreciated

  2. #2
    Join Date
    Jun 2019
    Country
    UNITED STATES
    State/Province
    Missouri
    Posts
    97
    Post Thanks / Like
    Likes (Given)
    46
    Likes (Received)
    69

  3. #3
    Join Date
    Jun 2018
    Country
    UNITED STATES
    State/Province
    Illinois
    Posts
    26
    Post Thanks / Like
    Likes (Given)
    11
    Likes (Received)
    0

    Default

    I am already drilled to 27/64 because I was looking for a 3/8-16 x 1/2-13 threaded insert. And because the hole was already egged out to that size

    That should work perfect and McMaster is usually very fast. I've ordered in the morning and got stuff in the afternoon before. Same with Grainger and MSC

    Thank you very much! I've got hours looking. Of course on the weekend, you can't call anybody

    Tapping Insert
    for Soft Metal, Zinc-Plated Steel, 3/8"-16 Thread Size
    default
    Each
    ADD TO ORDER
    In stock
    $5.17 Each
    90240A003
    For Use In Metal
    Threaded Insert Type Tapping
    Material Zinc-Plated Steel
    System of Measurement Inch
    Thread Direction Right Hand
    Thread Size 3/8"-16
    Thread Type UNC
    Thread Spacing Coarse
    Thread Fit Class 2B
    Installed Length 11/16"
    For Min.Material Thickness 11/16"
    Drill Bit Size 17/32"
    For Maximum Hole Diameter 17/32"
    End Type Open
    Tensile Strength Not Rated
    RoHS RoHS 3 (2015/863/EU) compliant
    Related Product Installation Tools
    Also known as Tap-Lok inserts, these inserts cut their own threads in soft metals such as aluminum, so there’s no need to tap the hole. Install them into a drilled hole

  4. #4
    Join Date
    Jun 2018
    Country
    UNITED STATES
    State/Province
    Illinois
    Posts
    26
    Post Thanks / Like
    Likes (Given)
    11
    Likes (Received)
    0

    Default

    Quote Originally Posted by Thunderjet View Post
    Do you know if these inserts are thread through style? I've run into some that have a bottom. The bolt threads in 3/4"

    Just for reference, Can an N bit be used for a 3/8-16 tap bit?

    I see the installation tool is rather expensive. Would a Grade * 3/8-16 bolt with a locking nut work just as good? Or a shoulder bolt?

    Installation Tool for 3/8"-16 Thread Size Tapping Insert
    default
    Each
    ADD TO ORDER
    Delivers Tuesday
    $175.69 Each
    90240A031
    1 each added to your order.
    Delivers Tuesday
    For Threaded Insert Type Tapping
    Compatible With Tap-Lok
    For System of Measurement Inch
    For Thread Direction Right Hand
    For Thread Size 3/8"-16
    Square Drive Size 7/16"
    Compatible with Tap-Lok inserts. Attach these tools to a ratchet wrench or drill chuck, and fasten an insert onto the end to screw the insert into a hole.

    McMaster-Carr

  5. #5
    Join Date
    May 2010
    Country
    DENMARK
    Posts
    3,232
    Post Thanks / Like
    Likes (Given)
    4013
    Likes (Received)
    12693

    Default

    Quote Originally Posted by jrsavoie View Post
    3/8-16 ID x 1/2-13 OD stainless threaded insert 3/4" long plus or minus 1/16 or so

    Does anybody sell one? I have been searching for 2 days and haven't found one. I think I need to go the full depth as the top of the cast aluminum comes to a small block about 1/2" thick the meatier part of the block is just below that.

    The original hole is 1-1/8" deep and threaded as far as it could be.

    I do not want to go with a bigger OD insert because I fear it would be too big.

    I am thinking about trying to drill and tap a 1/2-13 stainless bolt.

    Can an N bit be used for a 3/8-16 tap bit?

    I do not have a 7.7mm and was trying to use the smallest bit that would still allow the tap to work.

    Any advice would be greatly appreciated
    threadfms.jpg

    Smallest d1 on the 1/2-13 is 0.3936 and the largest D om 3/8-16 is 0.3897. You're leaving only a potential 0.0039". In fact only a potential 0.002" of material. One thread should be changed. A finer pitch would also help.

  6. #6
    Join Date
    Jun 2018
    Country
    UNITED STATES
    State/Province
    Illinois
    Posts
    26
    Post Thanks / Like
    Likes (Given)
    11
    Likes (Received)
    0

    Default

    Tapping Inserts for Soft Metal

    Also known as Tap-Lok inserts, these inserts cut their own threads in soft metals such as aluminum, so there’s no need to tap the hole. Install them into a drilled hole with an installation tool and a ratchet wrench. Installation tools can also be placed in the chuck on a drill press and turned by hand.

    3D CAD models availableFor technical drawings and 3-D models, click on a part number.

    Inch
    Inserts
    Installation Tools
    Thread
    Size Installed
    Lg. Drill Bit
    Size For Max.
    Hole Dia. Each Each
    Zinc-Plated Steel
    4-40 15/64" No. 21 0.159" 90240A007 $9.45 90240A022 $117.13
    6-32 9/32" 13/64" 13/64" 90240A008 9.45 90240A023 117.13
    8-32 21/64" 15/64" 15/64" 90240A009 9.45 90240A025 117.13
    10-24 3/8" J 0.277" 90240A010 9.45 90240A027 140.56
    10-32 3/8" 9/32" 9/32" 90240A006 2.75 90240A028 140.56
    1/4"-20 31/64" 11/32" 11/32" 90240A001 2.95 90240A029 140.56
    5/16"-18 9/16" 7/16" 7/16" 90240A002 3.33 90240A030 175.69
    3/8"-16 11/16" 17/32" 17/32" 90240A003 5.17 90240A031 175.69
    1/2"-13 29/32" 11/16" 11/16" 90240A004 7.61 90240A033 210.84
    5/8"-11 1 1/8" 55/64" 55/64" 90240A005 12.28 90240A034 500.00

    McMaster-Carr

  7. #7
    Join Date
    Jun 2018
    Country
    UNITED STATES
    State/Province
    Illinois
    Posts
    26
    Post Thanks / Like
    Likes (Given)
    11
    Likes (Received)
    0

    Default

    Google Search 3/8"-16 Tap-lok insert

    3/8"-16 Tap-lok insert - Google Search

  8. #8
    Join Date
    Jun 2018
    Country
    UNITED STATES
    State/Province
    Illinois
    Posts
    26
    Post Thanks / Like
    Likes (Given)
    11
    Likes (Received)
    0

    Default

    I am going into a gear case for a motor mount on a 4 wheeler. The motor mount is 3/8-16 stud 3/4" long. I believe I have the same motor mounts in 3/8-24. I am guessing that I will have to go with a larger OD for the insert. Like the 17/32 above.

    I am drilled to a depth of 7/8" with the 27/64 bit. The hole bottom is 1-1/8".

    9/16-12 31/64 tap bit. 5/8-11 17/32 tap bit.

    My concern about going bigger is the initial 1/2" the insert goes into is a rounded square about 15/16" diameter. I am trying to stay as small on the outside diameter to leave as much meat there as possible

    Any suggestions for a different way of going about what I need to do, to install the motor mount?

    I have never used Helicoils before. Only threaded inserts. I was under the impression that my hole was already too big for a helicoil - because I saw this -
    Internal Thread Size: 3/8-16 UNC
    Length: 0.75" (2x diameter)
    Material: 18-8 (304) Stainless Steel
    Type: Free Running
    Tap Size: 3/8-16 STI
    Drill Size: 25/64"

    Then I was told this: A 3/8 helicoil outside bore is .min .452 and max .472 29/64 would be 0.4531

    https://www.stanleyengineeredfasteni...lzRIeHvcfzfy-0
    Last edited by jrsavoie; 11-10-2019 at 03:59 PM.


Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •