了解全螺纹与半螺纹螺栓、粗牙与细牙螺纹应用。不锈钢螺栓的UNC、公制粗牙和公制细牙螺纹规格。
Thread Geometry: Understanding Thread Form and Engagement
螺纹术语对于正确规格很重要。螺距是相邻螺纹之间的距离。粗牙螺纹(c)每个直径有更大的螺距——M12×1.75（粗牙）对比M12×1.25（细牙）。
Full Thread vs Half Thread Hex Bolts: When to Use Each
选择全螺纹六角螺栓当：螺栓完全穿过母材并在外侧啮合螺母，当需要最大夹紧力时，或当母材厚度变化时。选择半螺纹六角螺栓当：螺栓啮合母材中的攻丝孔时。
Coarse vs Fine Thread: Application Selection Guide
粗牙螺纹与细牙螺纹的选择取决于应用。粗牙螺纹（英寸的UNC，默认公制粗牙）：组装更快，对交叉螺纹的抵抗力更好。细牙螺纹：动态载荷下更好的疲劳抵抗力。
UNC Thread Stainless Steel Bolts: Stock and Availability
UNC（统一国家粗牙）不锈钢螺栓库存包括从#4（2.8mm）到1-1/2"直径的尺寸。
Thread Selection Quick Reference
Content coming soon.
| Thread Type | Best For | Advantages | Disadvantages |
|---|---|---|---|
| Metric Coarse (Default) | General fastening, steel structures | Fast assembly, robust, standard | Less fine adjustment |
| Metric Fine | Precision machinery, thin walls | Better preload control, fatigue life | Slower assembly, cross-thread risk |
| UNC (Inch Coarse) | American equipment, repair parts | Global availability, cost effective | Not metric compatible |
| UNF (Inch Fine) | Aerospace, automotive, precision | High preload, vibration resistant | Limited sizes, premium cost |
Frequently Asked Questions
See frequently asked questions below.
细牙螺母可以和粗牙螺栓一起用吗？
不能。粗牙和细牙有不同的螺距，不能互换。M12×1.75粗牙螺栓需要M12×1.75螺母。
什么时候应该指定全螺纹螺栓？
当母材厚度变化时，当螺栓穿过母材并在外侧啮合螺母时，或当需要沿螺栓长度最大夹紧范围时，指定全螺纹。
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