Product Description
| Style | Flat Countersunk Nib Bolt |
| Standard | JIS B 1179 |
| Size | M10-M24 |
| Class | 4.8, 5.8, 6.8, 8.8, 10.9, 12.9 |
| Coating | black, zinc, HDG, Heat treatment, plain, etc. |
| Material | Carbon steel |
| Packing | bulk/ boxes in cartons, bulk in poly bags/ buckets, etc. |
| Pallet | solid wood pallet, plywood pallet, ton box/bag, etc. |
| Shipment Port | Shanghai & Ningbo |
Jiaxing City Qunbang Hardware Co, Ltd is a productiondesignsales and after-sales as one of the fasteners business, The company is located in HangjiaHu Plain, close to ShanghaiNingboZhapu ports. The geographical position is superior, the transportation is convenient, has created the natural superiority for the export.
JIS B 1179 Flat Countersunk Nib Bolts are specialized fasteners designed with anti-rotation features. Key components include a flat countersunk head and protruding nibs on the head’s underside, which lock into mating surfaces to prevent loosening under vibration or dynamic loads. These bolts adhere to the Japanese Industrial Standard JIS B 1179
Head Angle:
90°–95° for M10–M20 bolts (standard applications)
60°–65° for M22–M24 bolts (high-stress applications)134.
Nib Geometry:
Nibs (s) provide lateral locking force. Sizes vary by diameter (e.g., M10: s_max=3.2mm; M24: s_max=7mm)13.
Standard Sizes: M10, M12, M16, M20, M22, M2414.
Table: Critical Dimensions (Partial Data)134
Bolt Size Pitch (P) Head Diameter (dk) Head Height (k) Nib Width (s) Head Angle (α)
M10 1.5 mm 17.7–19 mm 5.3 mm 2.45–3.2 mm 90°–95°
M16 2 mm 30.4–32 mm 8.6 mm 3.45–4.2 mm 90°–95°
M24 3 mm 38.4–40 mm 13.7 mm 6.1–7 mm 60°–65°
FAQ
1. How do you let me trust you.
Jiaxing City Qunbang Hardware Co.,ltd hs its own right of import and export,QBH trademark in China,United States,European Union have been registered.At the same time,you can also check the registration information of our company in the China industry and Commerce system.
2. How about your price.
We will be based on different markets,for different quality and quantity,tailor-made prices for customers,in order to achieve win-win goal.
3. How do you control your quality.
Incoming quality contral( IQC)→Process Quality control(PQC)→Output quality control(OQC),and the random samples is sent to TUV for testing.If the customer received the goods and found quality problems,QBH company promises to be responsible for returning money or replenishing the goods
4. Could you provide free samples?
For new customer, We can provide free samples for standard fastener, But the clients will pay the express
charges. For old customer, We will send you free samples and pay express charges by ourself.
5. Do you accept small order?
QBH company can accept small orders if we have them in stock.Generally speaking,the stock probability of stainless steel fasteners is higher than that of carbon steel fasteners.
6. How about your delivery time
What we pursure is the high efficiency movement pattern,the stainless steel fastener delivery time about 15days,the carbon steel fastener will it about 30days
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JIS B 1179 Flat Countersunk Nib Bolts Images
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