Daily McMaster-Carr
@mcmasterdaily.bsky.social
Random stuff from the big yellow book.
DM for submissions - include a little story if you want
No affiliation with McMaster-Carr Supply Company
DM for submissions - include a little story if you want
No affiliation with McMaster-Carr Supply Company
Extra Heavy Duty Chain for Lifting
1/2 Trade Size
$23.55 per ft.
5478T5
It comes in either black or blue powder coat. Anyone know why blue?
1/2 Trade Size
$23.55 per ft.
5478T5
It comes in either black or blue powder coat. Anyone know why blue?
November 25, 2025 at 6:27 PM
Extra Heavy Duty Chain for Lifting
1/2 Trade Size
$23.55 per ft.
5478T5
It comes in either black or blue powder coat. Anyone know why blue?
1/2 Trade Size
$23.55 per ft.
5478T5
It comes in either black or blue powder coat. Anyone know why blue?
Chip-Clearing Hook
11-7/8" Hook Length
$24.73 Each
3035N11
It's illegal to use this and not have an eye patch and a parrot on your shoulder
11-7/8" Hook Length
$24.73 Each
3035N11
It's illegal to use this and not have an eye patch and a parrot on your shoulder
November 24, 2025 at 6:38 PM
Chip-Clearing Hook
11-7/8" Hook Length
$24.73 Each
3035N11
It's illegal to use this and not have an eye patch and a parrot on your shoulder
11-7/8" Hook Length
$24.73 Each
3035N11
It's illegal to use this and not have an eye patch and a parrot on your shoulder
Heavy Duty Bin-Box Cabinet
with 227 Bins, 60" Wide x 84" High x 24" Deep Overall Size
$2,817.11 each
5819T59
Bins on bins on bins!
with 227 Bins, 60" Wide x 84" High x 24" Deep Overall Size
$2,817.11 each
5819T59
Bins on bins on bins!
November 23, 2025 at 10:33 PM
Heavy Duty Bin-Box Cabinet
with 227 Bins, 60" Wide x 84" High x 24" Deep Overall Size
$2,817.11 each
5819T59
Bins on bins on bins!
with 227 Bins, 60" Wide x 84" High x 24" Deep Overall Size
$2,817.11 each
5819T59
Bins on bins on bins!
USB Adapter
Standard 2.0, 90 Degree USB A Female x Reversible USB A Male
$6.56 Each
8761K423
Reversible USB A connectors are so weird. Makes sense for a 90 degree adapter so you don't have to worry about left/right.
Standard 2.0, 90 Degree USB A Female x Reversible USB A Male
$6.56 Each
8761K423
Reversible USB A connectors are so weird. Makes sense for a 90 degree adapter so you don't have to worry about left/right.
November 22, 2025 at 7:49 PM
USB Adapter
Standard 2.0, 90 Degree USB A Female x Reversible USB A Male
$6.56 Each
8761K423
Reversible USB A connectors are so weird. Makes sense for a 90 degree adapter so you don't have to worry about left/right.
Standard 2.0, 90 Degree USB A Female x Reversible USB A Male
$6.56 Each
8761K423
Reversible USB A connectors are so weird. Makes sense for a 90 degree adapter so you don't have to worry about left/right.
Extendable Pointer
$13.53 Each
5190T14
Gonna buy one of these so I can whack TV screens when I do powerpoints
$13.53 Each
5190T14
Gonna buy one of these so I can whack TV screens when I do powerpoints
November 21, 2025 at 7:30 PM
Extendable Pointer
$13.53 Each
5190T14
Gonna buy one of these so I can whack TV screens when I do powerpoints
$13.53 Each
5190T14
Gonna buy one of these so I can whack TV screens when I do powerpoints
Vertical Benchtop Optical Comparator
with Edge Detection
18,051.60 Each
6378N12
I learned to use optical comparators during university at a summer machining program. It felt like being a radar operator or one of those guys sitting at a console in a Star Wars ship.
with Edge Detection
18,051.60 Each
6378N12
I learned to use optical comparators during university at a summer machining program. It felt like being a radar operator or one of those guys sitting at a console in a Star Wars ship.
November 20, 2025 at 7:44 PM
Vertical Benchtop Optical Comparator
with Edge Detection
18,051.60 Each
6378N12
I learned to use optical comparators during university at a summer machining program. It felt like being a radar operator or one of those guys sitting at a console in a Star Wars ship.
with Edge Detection
18,051.60 Each
6378N12
I learned to use optical comparators during university at a summer machining program. It felt like being a radar operator or one of those guys sitting at a console in a Star Wars ship.
Screwdriver
1/4" Slotted, 28-1/2" Overall Length
$27.00 each
6970A17
Loooooooooong.
1/4" Slotted, 28-1/2" Overall Length
$27.00 each
6970A17
Loooooooooong.
November 20, 2025 at 2:17 AM
Screwdriver
1/4" Slotted, 28-1/2" Overall Length
$27.00 each
6970A17
Loooooooooong.
1/4" Slotted, 28-1/2" Overall Length
$27.00 each
6970A17
Loooooooooong.
Male x Female Data-Blocking USB A Adapter
$24.38 Each
6855N11
There were lots of comments on that USB-C adapter saying it was for blocking data transmission. It was not, in fact it was rated for 5Gbps. THIS is a data blocking adapter! And it even physically locks into the port.
$24.38 Each
6855N11
There were lots of comments on that USB-C adapter saying it was for blocking data transmission. It was not, in fact it was rated for 5Gbps. THIS is a data blocking adapter! And it even physically locks into the port.
November 18, 2025 at 6:15 PM
Male x Female Data-Blocking USB A Adapter
$24.38 Each
6855N11
There were lots of comments on that USB-C adapter saying it was for blocking data transmission. It was not, in fact it was rated for 5Gbps. THIS is a data blocking adapter! And it even physically locks into the port.
$24.38 Each
6855N11
There were lots of comments on that USB-C adapter saying it was for blocking data transmission. It was not, in fact it was rated for 5Gbps. THIS is a data blocking adapter! And it even physically locks into the port.
Bandana-Style Bump Cap
$31.90 each
8522N111
Bonk your head in style!
$31.90 each
8522N111
Bonk your head in style!
November 17, 2025 at 9:56 PM
Bandana-Style Bump Cap
$31.90 each
8522N111
Bonk your head in style!
$31.90 each
8522N111
Bonk your head in style!
USB Adapter
USB C Male x USB C Female
$18.46 Each
8761K415
I am confused by what someone would use this for.
USB C Male x USB C Female
$18.46 Each
8761K415
I am confused by what someone would use this for.
November 16, 2025 at 9:42 PM
USB Adapter
USB C Male x USB C Female
$18.46 Each
8761K415
I am confused by what someone would use this for.
USB C Male x USB C Female
$18.46 Each
8761K415
I am confused by what someone would use this for.
Nonsparking Hacksaw
$525.07 Each
2763N21
Beryllium! 🤩
$525.07 Each
2763N21
Beryllium! 🤩
November 16, 2025 at 12:47 AM
Nonsparking Hacksaw
$525.07 Each
2763N21
Beryllium! 🤩
$525.07 Each
2763N21
Beryllium! 🤩
Outside Micrometer Stand
3/4" Maximum Jaw Opening
$29.78 each
2312A16
I bought a cheaper version of this stand on Amazon and no matter how tight I crank the angle adjustment, it flops over. Should've just gotten this one.
3/4" Maximum Jaw Opening
$29.78 each
2312A16
I bought a cheaper version of this stand on Amazon and no matter how tight I crank the angle adjustment, it flops over. Should've just gotten this one.
November 14, 2025 at 7:15 PM
Outside Micrometer Stand
3/4" Maximum Jaw Opening
$29.78 each
2312A16
I bought a cheaper version of this stand on Amazon and no matter how tight I crank the angle adjustment, it flops over. Should've just gotten this one.
3/4" Maximum Jaw Opening
$29.78 each
2312A16
I bought a cheaper version of this stand on Amazon and no matter how tight I crank the angle adjustment, it flops over. Should've just gotten this one.
5-Way 90 Degree Elbow for 1-1/2" Rail ID Carbon Fiber Slip-on Framing
$250.48 Each
1935N74
Who's using carbon fiber framing systems, and for what? Weight savings is obviously a major factor, but dang 😳
$250.48 Each
1935N74
Who's using carbon fiber framing systems, and for what? Weight savings is obviously a major factor, but dang 😳
November 13, 2025 at 7:50 PM
5-Way 90 Degree Elbow for 1-1/2" Rail ID Carbon Fiber Slip-on Framing
$250.48 Each
1935N74
Who's using carbon fiber framing systems, and for what? Weight savings is obviously a major factor, but dang 😳
$250.48 Each
1935N74
Who's using carbon fiber framing systems, and for what? Weight savings is obviously a major factor, but dang 😳
Installation Tool for 1/2" to 5/8" ID Corrugated and Wrap-Around Sleeving
$7.90 Each
6827N12
These are the tools you don't learn about until after a huge job.
$7.90 Each
6827N12
These are the tools you don't learn about until after a huge job.
November 12, 2025 at 9:27 PM
Installation Tool for 1/2" to 5/8" ID Corrugated and Wrap-Around Sleeving
$7.90 Each
6827N12
These are the tools you don't learn about until after a huge job.
$7.90 Each
6827N12
These are the tools you don't learn about until after a huge job.
Hand Vise
for Irregularly Shaped Material
$57.84 Each
5042A45
I can think of a few times with a Dremel where this would have been really nice to have
for Irregularly Shaped Material
$57.84 Each
5042A45
I can think of a few times with a Dremel where this would have been really nice to have
November 11, 2025 at 6:12 PM
Hand Vise
for Irregularly Shaped Material
$57.84 Each
5042A45
I can think of a few times with a Dremel where this would have been really nice to have
for Irregularly Shaped Material
$57.84 Each
5042A45
I can think of a few times with a Dremel where this would have been really nice to have
Fork-Mount Towing Adapter
$407.70 Each
9114N11
Is there anything forklifts can't do?
$407.70 Each
9114N11
Is there anything forklifts can't do?
November 10, 2025 at 8:56 PM
Fork-Mount Towing Adapter
$407.70 Each
9114N11
Is there anything forklifts can't do?
$407.70 Each
9114N11
Is there anything forklifts can't do?
Handheld Barcode Scanner
Laser Scanner, USB-A Connection
$178.07 each
1735T11
Most USB barcode scanners are just HID devices so you can do all sorts of cursed things with them.
Laser Scanner, USB-A Connection
$178.07 each
1735T11
Most USB barcode scanners are just HID devices so you can do all sorts of cursed things with them.
November 10, 2025 at 12:51 AM
Handheld Barcode Scanner
Laser Scanner, USB-A Connection
$178.07 each
1735T11
Most USB barcode scanners are just HID devices so you can do all sorts of cursed things with them.
Laser Scanner, USB-A Connection
$178.07 each
1735T11
Most USB barcode scanners are just HID devices so you can do all sorts of cursed things with them.
Pastry Brush
4" Wide x 2-1/4" Long Bristles, White
$19.55 Each
9283T242
Mmmmm pastries. And associated brushes.
4" Wide x 2-1/4" Long Bristles, White
$19.55 Each
9283T242
Mmmmm pastries. And associated brushes.
November 9, 2025 at 5:19 AM
Pastry Brush
4" Wide x 2-1/4" Long Bristles, White
$19.55 Each
9283T242
Mmmmm pastries. And associated brushes.
4" Wide x 2-1/4" Long Bristles, White
$19.55 Each
9283T242
Mmmmm pastries. And associated brushes.
Cold-Protection Clothing Kit
$443.97 each
8364N201
When the science teacher walked out in this you knew it was gonna be a fun class.
$443.97 each
8364N201
When the science teacher walked out in this you knew it was gonna be a fun class.
November 7, 2025 at 7:19 PM
Cold-Protection Clothing Kit
$443.97 each
8364N201
When the science teacher walked out in this you knew it was gonna be a fun class.
$443.97 each
8364N201
When the science teacher walked out in this you knew it was gonna be a fun class.
Padlock-Style Tamper-Seal Tags
100 lb. Average Breaking Strength
Packs of 1000
1-4 Packs $168.00
5 or more $151.06
2041T7
Custom message tags for about $0.16 each... I'm thinking of alternate uses for these. 😁
100 lb. Average Breaking Strength
Packs of 1000
1-4 Packs $168.00
5 or more $151.06
2041T7
Custom message tags for about $0.16 each... I'm thinking of alternate uses for these. 😁
November 6, 2025 at 8:57 PM
Padlock-Style Tamper-Seal Tags
100 lb. Average Breaking Strength
Packs of 1000
1-4 Packs $168.00
5 or more $151.06
2041T7
Custom message tags for about $0.16 each... I'm thinking of alternate uses for these. 😁
100 lb. Average Breaking Strength
Packs of 1000
1-4 Packs $168.00
5 or more $151.06
2041T7
Custom message tags for about $0.16 each... I'm thinking of alternate uses for these. 😁
T-Handle Locking Quick-Release Pin with Ring
17-4 PH Stainless Steel, 1/4" Diameter, 1" Usable Length
$23.17 each
90293A112
I've never designed anything that had a quick release pin and I feel like I won't be a real engineer until I do.
17-4 PH Stainless Steel, 1/4" Diameter, 1" Usable Length
$23.17 each
90293A112
I've never designed anything that had a quick release pin and I feel like I won't be a real engineer until I do.
November 5, 2025 at 10:16 PM
T-Handle Locking Quick-Release Pin with Ring
17-4 PH Stainless Steel, 1/4" Diameter, 1" Usable Length
$23.17 each
90293A112
I've never designed anything that had a quick release pin and I feel like I won't be a real engineer until I do.
17-4 PH Stainless Steel, 1/4" Diameter, 1" Usable Length
$23.17 each
90293A112
I've never designed anything that had a quick release pin and I feel like I won't be a real engineer until I do.
Automatic Office Stapler
for Up to 60 Sheets
$441.68 Each
8401T3
The sound of stapling through 60 sheets at once must be amazing. Submitted by kedihecker on Twitter
for Up to 60 Sheets
$441.68 Each
8401T3
The sound of stapling through 60 sheets at once must be amazing. Submitted by kedihecker on Twitter
November 5, 2025 at 3:17 AM
Automatic Office Stapler
for Up to 60 Sheets
$441.68 Each
8401T3
The sound of stapling through 60 sheets at once must be amazing. Submitted by kedihecker on Twitter
for Up to 60 Sheets
$441.68 Each
8401T3
The sound of stapling through 60 sheets at once must be amazing. Submitted by kedihecker on Twitter
Electric Portable Ultraviolet Disinfecting Light
$582.19 each
3601N11
Handheld UV-C, wear eye and skin protection! 😎
$582.19 each
3601N11
Handheld UV-C, wear eye and skin protection! 😎
November 4, 2025 at 4:19 AM
Electric Portable Ultraviolet Disinfecting Light
$582.19 each
3601N11
Handheld UV-C, wear eye and skin protection! 😎
$582.19 each
3601N11
Handheld UV-C, wear eye and skin protection! 😎
High-Temperature 3D Printer Filament
Ultra-Strength, Fiberglass-Filled PEEK, 1.75mm Diameter
$453.72 Each
3489N21
Expensive and insanely hard to print, everyone should have a 500g roll of PEEK.
Ultra-Strength, Fiberglass-Filled PEEK, 1.75mm Diameter
$453.72 Each
3489N21
Expensive and insanely hard to print, everyone should have a 500g roll of PEEK.
November 3, 2025 at 5:41 AM
High-Temperature 3D Printer Filament
Ultra-Strength, Fiberglass-Filled PEEK, 1.75mm Diameter
$453.72 Each
3489N21
Expensive and insanely hard to print, everyone should have a 500g roll of PEEK.
Ultra-Strength, Fiberglass-Filled PEEK, 1.75mm Diameter
$453.72 Each
3489N21
Expensive and insanely hard to print, everyone should have a 500g roll of PEEK.
Nonsparking 6-Point Socket
1/2" Square Drive, 10mm Size
$48.16 Each
6503A51
Another oddball 10mm!
1/2" Square Drive, 10mm Size
$48.16 Each
6503A51
Another oddball 10mm!
November 2, 2025 at 12:11 AM
Nonsparking 6-Point Socket
1/2" Square Drive, 10mm Size
$48.16 Each
6503A51
Another oddball 10mm!
1/2" Square Drive, 10mm Size
$48.16 Each
6503A51
Another oddball 10mm!