M8 M12 M16 B7 Blue Zinc Plating METAL BOLT Hexagon Head Flange Bolt DIN6921
| Name | Metal Bolt |
| Standard | DIN, ASME, ANSI, ISO |
| Material | Steel |
| Place of Origin | China |
| Finish | Polish, Passivation, Black, Galvanization, Chromate, Dacromet |
| Certificate | ISO9001:2008, ROHS |
| Used | Building Industry Machinery |
| Thread Type | Coarse, Fine |
| Usage | Fastening |
| Function | Connection, Fastening and Decoration |
| Strength | High |
| Size | Various sizes available |
| Measurement System | INCH, Metric system |
The bolt adopts an integrated structure comprising a hexagonal head, a flange, and a threaded shank, with the flange diameter enlarged by 30%–50% compared to conventional bolts. The patented technology disclosed in 2024 reveals an innovative design featuring a square-step shoulder with annular grooves, into which silicone rubber elastic sealing skirts are embedded. Adjacent skirts form a 0.3 mm oil-guiding channel, while a self-sealing oil injection port is integrated at the top. The shank employs a stepped design, consisting of a smooth cylindrical segment (accounting for 35%–45% of the length) and a threaded segment, with a 15° conical smooth neck section at the transition to enhance shear resistance.
- Copper material: Zinc copper alloy nuts, etc.
- Stainless steel: Copper nut, inlaid copper nut, knurled copper nut, embedded copper nut, injection copper nut
- Round nut, ring nut, butterfly nut
- DISC-LOCK lock nut: Two-part design with staggered CAMs for vibration resistance
- Self-locking nut, locking nut, four-claw nut, driving nut safety nut
- Thin rod screw connection nut, self-locking hexagonal cap nut
- Special anchor screw nut, hexagonal crown thin nut, suspension ring nut
- Welded square nut, welded hexagon nut, fastening nut, inserted round nut
- Fine teeth all metal hexagonal flange face lock nut
- Round nut with slot, round nut with hole on side/end, small round nut
| Aluminum | Excellent thermal/electrical conductivity but naturally soft. May produce gelatinous buildup during processing. |
| Titanium | EDM machining recommended. Requires deionized water to control heat during processing. |
| Steel | Very strong metal. Wire cutting machines often preferred for complex features. Requires heat management. |
| Brass | High tensile strength, easy to machine but requires slow cutting speed due to softness. |
- Reusable medium carbon steel construction
- Easy installation and disassembly
- Time-Saving: Eliminates the need for additional washers, streamlining assembly
- Improved Joint Integrity: Maintains consistent preload, reducing joint failure risks.
- Durable wholeness
A: We are factory and OEM are available.
A: Generally 7-10 days if in stock, or 15-20 days if not in stock (depending on quantity).
A: Yes, we offer free samples but customer pays freight cost.
A: 30% T/T in advance, balance before shipment or L/C.
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