Product Description
The 304 stainless steel unequal-length double-ended stud is a fastener manufactured from high-quality 304 austenitic stainless steel through precision machining, featuring unequal thread lengths at both ends. One end features a short thread for insertion, while the other end has a long thread for tightening, with a smooth shank in between. The structural design is tailored for special installation scenarios requiring deep tightening at one end and shallow tightening at the other, offering versatility, corrosion resistance, and structural stability.
Basic Product Information
- Product Name: 304 Stainless Steel Unequal-Length Double-Ended Studs, Long-Short Thread Studs, Custom Double-Ended Bolts
- Standards: GB/T 898, DIN 939; Customizable according to drawings
- Material: 304 Stainless Steel (A2-70)
- Surface Treatment: Natural Finish, Pickled and Passivated
- Structural Features: Unequal thread lengths at both ends-one end with long threads and the other with short threads, with a smooth shank in between
Product Features
- 304 Grade, Rust- and Corrosion-Resistant: Made of high-quality 304 stainless steel, it resists oxidation, moisture, and acids/alkalis, making it suitable for corrosion-resistant applications in food, medical, outdoor, and equipment settings.
- Uneven Thread Length for Screw-in Installation: One end features short threads for screwing into the body or threaded holes, while the other end has long threads for tightening the nut, ensuring a more secure installation and precise positioning.
- Headless design for high space utilization: Ideal for tight spaces, flanges, valves, and internal equipment connections, without occupying installation space.
- High thread precision for smooth engagement: Neatly formed threads prevent jamming or stripping, and are compatible with stainless steel nuts and flat washers.
- Complete range of specifications with customization available: Standard sizes from M6 to M24 are available, and thread length, overall length, and pitch can all be customized to customer requirements.
Applications
- Installation in threaded holes on equipment bodies (screwed in at one end and locked at the other)
- Connections for valves, flanges, pump bodies, and piping
- Food processing machinery, medical devices, and water treatment equipment
- Mounting of electronic instruments, enclosures, and molds
- Corrosion-resistant connections for outdoor facilities, curtain walls, and solar panel mounts
Standard Size Chart (mm)
|
Specifications |
Pitch P |
Short Threaded End bm |
Long Threaded End b |
Standard Total Length L |
|
M6 |
1.0 |
6 |
18 |
30–100 |
|
M8 |
1.25 |
8 |
22 |
40–120 |
|
M10 |
1.5 |
10 |
26 |
50–150 |
|
M12 |
1.75 |
12 |
30 |
60–200 |
|
M16 |
2.0 |
16 |
40 |
80–250 |
|
M20 |
2.5 |
20 |
50 |
100–300 |
|
M24 |
3.0 |
24 |
60 |
120–300 |
Common lengths: 30, 40, 50, 60, 70, 80, 90, 100, 120, 150, 160, 180, 200, 250, 300
FAQ
1. What quality control measures are in place for studs?
We implement full-process quality inspection: raw material inspection, dimensional inspection, mechanical property testing, and salt spray testing. We can provide third-party test reports from SGS, BV, and others.
2. Why do studs break or strip during use?
Common causes: excessive or insufficient tightening torque, incorrect strength or grade selection, thread mismatch, corrosion or aging, or incorrect installation method.
3. What is the minimum order quantity for studs?
Standard specifications: Minimum order quantity is generally 100 kg or 1 ton; trial orders are negotiable.
Custom specifications: Depends on the complexity of the specifications; typically 500 kg minimum.
Large-volume orders: Eligible for volume discounts and priority production scheduling.
4. What is the production lead time for orders?
Standard stock items: Ship within 3–7 days
Custom production: 15–25 days after receiving the advance payment (depending on quantity and complexity)
Rush orders: Expedited production available
5. What payment methods are accepted?
Common payment methods: T/T (Wire Transfer): 30% advance payment, 70% paid in full before shipment
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