The best M8-1.25 double-ended stud depends on the length, material, and quantity your project requires. For a mixed-size stainless steel assortment, choose the 16-piece M8 kit; for an 80 mm stud, consider METALLIXITY; and for shorter zinc-plated steel studs, compare the 35 mm and 46 mm options. The uxcell 40 mm stud is a straightforward choice when you need a specific stainless steel length. Check thread pitch and usable thread length before ordering.
| Product | Length or size range | Material | Best for |
|---|---|---|---|
| Metric 16-piece assortment | 30, 50, and 70 mm | 304 stainless steel | Several lengths and included nuts |
| METALLIXITY | 80 mm overall; 25 mm threads per end | 304 stainless steel | Longer connections |
| Hard-to-Find Fastener | 46 mm | Zinc-plated steel | Automotive or machinery applications |
| uxcell | 40 mm | A2-70 (304) stainless steel | A single specified length |
| Hard-to-Find Fastener | 35 mm | Zinc-plated steel | Shorter studs in a pack of eight |
Metric 16-Piece M8 Stainless Steel Assortment
This assortment includes M8 studs in three lengths: six 30 mm pieces, six 50 mm pieces, and four 70 mm pieces. The listing specifies an M8 thread with a 1.25 mm pitch and 304 stainless steel construction. It also lists 15 M8 nuts.
Best for: Buyers who need more than one stud length or want nuts included in the same set. It was selected for its range of sizes and clearly stated metric pitch. Stainless steel is listed for indoor and outdoor use.
Check before buying: Measure the required length and confirm that your mating nuts are metric. The listing cautions that these are not suitable for imperial nuts; the number of included nuts also differs from the 16 stud pieces.
METALLIXITY M8 Stainless Steel Stud, 80 mm
This pack contains five double-ended studs made from 304 stainless steel. Each is listed as 80 mm long overall, with an M8 diameter, 1.25 mm pitch, and 25 mm of thread on each side. The product description identifies house maintenance and electrical appliances as potential applications when a standard bolt is not suitable for the connection.
Best for: Buyers who need a longer stud and can use 25 mm of thread at each end. The specified overall length and end-thread measurements make it easier to compare with the space and engagement your assembly requires.
Check before buying: The threaded portions are not the full 80 mm. Avoid this option if you need a different thread length or a shorter stud.
Hard-to-Find Fastener M8 Zinc-Plated Stud, 46 mm
This pack includes five 46 mm studs with an 8 mm-1.25 thread specification. The listed material is steel with zinc plating, which the product description says provides corrosion resistance. The listing describes the studs for automotive, construction, and heavy machinery uses.
Best for: Buyers who need a mid-length steel stud and prefer a five-piece pack. Dual-ended threads are intended to let components be fastened with a stud and nut arrangement, and the zinc-plated finish is a stated feature.
Check before buying: This is zinc-plated steel, not the 304 stainless steel used in several other options. Confirm the 46 mm length and application suitability before selecting it.
uxcell A2 Stainless Steel M8 Stud, 40 mm
The uxcell listing specifies a 40 mm double-end bolt made from A2-70 (304) stainless steel. Its thread standard is M8, with a 1.25 mm pitch. The product is silver tone and is sold in a pack of five.
Best for: Buyers who have measured for a 40 mm stud and want a stainless steel option in a compact five-piece pack. The stated material and pitch provide direct comparison points against the zinc-plated steel alternatives.
Check before buying: The supplied details do not specify the length of the threaded sections at each end. Verify that the overall length and thread engagement meet your assembly’s requirements.
Hard-to-Find Fastener M8 Zinc-Plated Stud, 35 mm
This option is a pack of eight zinc-plated steel studs measuring 35 mm. The listing identifies the thread as 8 mm-1.25 and describes the dual-ended threading as useful for securing components and allowing accessory removal. It also states that the steel has a corrosion-resistant zinc coating.
Best for: Buyers who need a shorter stud and value a larger pack than the five-piece options. It is a better length match than the 46 mm version when the available space calls for 35 mm.
Check before buying: Choose a stainless steel product instead if your material requirement calls for 304 or A2 stainless steel. The listing does not provide the threaded length at each end.
Buying Guide: Choosing An M8-1.25 Double-Ended Stud
How do you confirm the thread size?
M8 refers to a nominal 8 mm metric thread diameter, while 1.25 mm is the distance between thread peaks. Match both details to the mating hole, nut, or component. Do not assume an imperial nut will fit; the assortment listing specifically warns against mixing metric studs with imperial nuts.
What stud length should you choose?
Measure the full required stud length and the available clearance. Overall length is not the same as usable thread length. METALLIXITY specifies 25 mm of thread per end, while the other listings do not state exact thread-section lengths. Allow for the material the stud must pass through and the nut’s engagement.
Should you choose stainless steel or zinc-plated steel?
The listed stainless options use 304 or A2-70 (304) stainless steel. The two Hard-to-Find Fastener products use zinc-plated steel and describe the coating as corrosion resistant. Compare the stated material with your project’s exposure and specifications; do not treat the finishes as interchangeable.
Is a kit or single length more practical?
Choose the 16-piece assortment if you need 30, 50, and 70 mm options and included nuts. Choose a single-length pack when you already know the required size. Compare the number of pieces as well as length: the products range from five studs to eight, and the assortment includes multiple lengths.
Frequently Asked Questions
What does M8-1.25 mean?
It indicates an 8 mm nominal metric thread diameter and a 1.25 mm thread pitch.
Can an M8-1.25 stud use an imperial nut?
No. Use a compatible M8-1.25 metric nut. The assortment listing explicitly says it is not suitable for imperial nuts.
Are the listed studs all stainless steel?
No. The assortment, METALLIXITY, and uxcell products are listed as stainless steel. Both Hard-to-Find Fastener options are zinc-plated steel.
Does an 80 mm stud have 80 mm of thread?
No. METALLIXITY lists 80 mm as the total length and specifies 25 mm of thread on each end.
Which option includes several lengths?
The 16-piece assortment includes 30 mm, 50 mm, and 70 mm studs, plus 15 M8 nuts.