M14 x 2 x 40mm bolts have a 14mm diameter, a 2mm thread pitch, and a 40mm length measured from beneath the head when specified. The best choice depends on head style, material, finish, and how many fasteners you need. The uxcell serrated flange bolts suit buyers seeking a 10.9-grade flange design, while the Glvaner option provides six full-thread bolts. Choose the Kozelo stainless steel bolts when a 304 stainless option is preferred, or consider the standard hex cap screws for a basic steel fastener.
| Product | Notable features | Best suited for |
|---|---|---|
| uxcell, 4-piece | 10.9-grade carbon steel, serrated flange | Buyers needing four flange bolts |
| uxcell, 2-piece | 10.9-grade carbon steel, serrated flange | Small repairs or a two-bolt replacement |
| Glvaner, 6-piece | 10.9-grade alloy steel, full thread | Buyers needing a larger set |
| Kozelo, 2-piece | 304 stainless steel, A2-70 | General-purpose stainless fasteners |
| Hard-to-Find Fastener, 3-piece | Class 10.9 steel hex cap screws | Buyers seeking a basic hex cap screw |
uxcell M14 x 40mm Serrated Flange Bolts, 4-Piece
These uxcell bolts combine an M14 diameter and 2mm pitch with a 40mm under-head length. The listing specifies 10.9-grade carbon steel, a black oxide finish, and a serrated flange. The flange diameter is 28mm; the hex is 18mm wide and 12.4mm thick.
Best for: Buyers who need four flange bolts for equipment, household assembly, or construction-related projects and want a higher-strength grade specified. The flange head integrates a wider bearing surface into the bolt design. Limitation: The black oxide finish is not described as suitable for every corrosive or wet environment, so assess the conditions before choosing it.
uxcell M14 x 40mm Serrated Flange Bolts, 2-Piece
This two-bolt package has the same listed dimensions and materials as the four-piece uxcell option: M14 thread diameter, 2mm pitch, 40mm under-head length, 10.9-grade carbon steel, and black oxide finish. It also has a serrated flange with a 28mm diameter.
Best for: A small repair or a project that calls for only two matching flange bolts. It offers the same specified bolt style as the larger uxcell package without requiring four pieces. Limitation: Choose another package if you need more than two bolts; the listed specifications do not establish suitability for a particular machine or vehicle.
Glvaner M14 x 40mm Full-Thread Flange Bolts
Glvaner lists six full-thread M14-2.0 bolts with a 40mm length measured from under the head. The stated material is 10.9-grade alloy steel with a black oxide finish. Its listed hex drive size is 21mm, which differs from the 18mm hex width listed for the uxcell bolts.
Best for: Buyers who need six full-thread bolts and have confirmed that the 21mm hex drive and flange-bolt dimensions suit their application. The package quantity and full-thread description make it a distinct option from the uxcell products. Limitation: The listing describes corrosion resistance as good in dry environments; it does not claim the finish is ideal for wet or highly corrosive service.
Kozelo M14 x 40mm 304 Stainless Bolts
This two-piece set uses 304 stainless steel with an A2-70 performance grade and a plain surface. The bolts are fully threaded, have a hex head, and are listed as DIN933. The thread size is M14-2, with a stated 40mm thread length.
Best for: Buyers who specifically want 304 stainless steel for interior construction, machinery assembly, or general-purpose repairs. The material distinguishes this option from the listed black-oxide carbon and alloy steel bolts. Limitation: The package contains only two bolts, and stainless steel should not be assumed to be the right choice for every load, environment, or metal combination.
Hard-to-Find Fastener Class 10.9 Hex Cap Screws
This listing specifies three steel hex cap screws with a 14mm diameter and 40mm length, and identifies them as Class 10.9. It does not provide additional details about thread pitch, finish, or thread coverage in the supplied product information.
Best for: Buyers looking for a three-piece steel hex cap screw set who can verify the remaining specifications against their application. Limitation: The supplied details do not state the pitch, so confirm that the thread is M14 x 2 before ordering if that exact pitch is required.
Buying Guide: Choosing an M14 x 2 x 40mm Bolt
What do M14, 2mm, and 40mm mean?
M14 identifies a nominal thread diameter of 14mm. The 2mm figure is the distance between thread peaks, also called the pitch. A 40mm bolt length is commonly measured from beneath the head, as specified for several of these listings. Check the product’s measurement description, especially when comparing head styles.
Should you choose a flange bolt or a hex cap screw?
A flange bolt has a wider integrated base beneath its head; the uxcell listings also specify serrations. A hex cap screw is a conventional hex-head fastener. Confirm the head style, bearing surface, and available tool clearance required by the assembly. The listed hex widths vary, so do not assume the bolts use the same wrench size.
Which material and finish fit the environment?
The products include carbon or alloy steel with black oxide and 304 stainless steel with a plain surface. The Glvaner listing describes its black oxide finish as suitable for good corrosion resistance in dry environments. Select materials based on the application’s exposure and engineering requirements rather than assuming any finish is appropriate for outdoor, wet, or chemical exposure.
How many bolts should you order?
Compare the package quantities: two, three, four, or six pieces. Match quantity to the assembly and consider whether identical head style, material, and grade are needed throughout. Before installing a fastener in machinery or a structural application, verify all specifications against the equipment documentation or a qualified professional’s guidance.
Frequently Asked Questions
Is M14 x 2 the same as M14 x 2.0?
Yes. Both notations specify an M14 thread with a 2mm pitch.
Does a 40mm bolt length include the head?
For the uxcell and Glvaner listings, 40mm is measured from beneath the head. Check the measurement convention for any other bolt before comparing lengths.
Are all five products flange bolts?
No. The uxcell and Glvaner products are described as flange bolts. The Kozelo and Hard-to-Find Fastener products are described as hex head or hex cap screws.
Which listing specifies stainless steel?
The Kozelo two-piece set specifies 304 stainless steel and A2-70. The other listed products specify steel or carbon/alloy steel.
Which product details should I verify before ordering?
Confirm thread pitch, under-head length, head style, material, finish, hex size, and package quantity. The Hard-to-Find Fastener listing does not state its thread pitch in the supplied details.