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
