Overview
Galvanized elevator bolts are essential fasteners designed specifically for elevator assembly and maintenance. These bolts feature a zinc coating that provides superior protection against rust and corrosion, critical for ensuring long-term structural integrity in elevator systems. Manufactured from high-grade carbon steel, they combine tensile strength with the electrochemical benefits of galvanization. Their unique square neck design prevents rotation during installation, making them ideal for securing elevator guide rails, car frames, and other load-bearing components.
Structure and Working Principle
These bolts consist of three key structural elements: the threaded shank, the square neck beneath the head, and the galvanized coating. The square neck bites into mounting surfaces to resist rotational forces, while the threads provide adjustable clamping force. The zinc coating (typically 5-25µm thick) creates a sacrificial barrier through hot-dip or electroplating processes. This coating corrodes preferentially to the base metal, extending the bolt's service life even in humid elevator shafts. The combination of mechanical interlock (square neck) and chemical protection (zinc) ensures reliable performance under dynamic loads.
Key Features
Corrosion resistance is the standout feature, with galvanized bolts lasting 5-10 times longer than untreated fasteners in harsh environments. The zinc coating also provides minor lubricity during installation. Mechanical properties typically meet Grade 4.8 or 8.8 standards, offering tensile strengths of 400-800 MPa. Unlike standard bolts, their square neck design eliminates the need for separate washers in many applications, reducing installation time and parts inventory.
Application Areas
Primary applications include elevator guide rail mounting, car frame assembly, and counterweight system installations. They're also used in escalator step chain adjustments and machinery platform anchoring. Beyond vertical transportation, these bolts see use in outdoor construction projects, marine equipment, and any application requiring vibration-resistant fasteners with environmental durability. Their combination of strength and corrosion protection makes them versatile for both OEM installations and maintenance replacements.
Maintenance and Precautions
Regular inspections should check for white rust (zinc oxide) formation or coating wear, especially in high-friction areas. Never use galvanized bolts with stainless steel components without dielectric insulation to prevent galvanic corrosion. During installation, use calibrated torque wrenches to avoid stripping threads. The square neck requires proper seating - ensure mounting surfaces are clean and flat. For maintenance, replace any bolts showing thread deformation or significant coating loss (more than 30% surface area).
B2B Procurement Guide
Bulk buyers should specify: 1) Coating type (hot-dip vs electroplated), 2) Zinc thickness (microns), 3) Mechanical grade, 4) Head type (typically square). MOQs usually start at 1,000 units, with discounts available for container-load quantities. Leading manufacturers include Bossard, ITW Shakeproof, and domestic Chinese producers like Shanghai Prime Machinery. Always request mill test certificates for material verification. For critical elevator applications, consider third-party coating thickness testing to ensure compliance with ISO 1461 or ASTM A153 standards.
Related Manufacturers
- 主营：[]
- 主营：自攻螺丝、燕尾螺钉、圆形弹垫、螺栓螺丝、六角螺栓、焊接螺栓、螺栓垫片、双头螺栓、注塑螺栓、自钻螺钉、螺母垫片、活节螺丝、六角螺母、法兰螺母、加大平垫、六角螺丝、法兰螺帽、化学锚栓、压板螺母、自钻螺丝、钻尾螺钉、拉铆螺母、导向螺钉、钻尾螺丝、螺丝螺母
- 主营：缩梗螺栓、扭剪螺栓、双头螺栓、预埋螺栓、大六角螺栓、高强度螺栓、双头螺纹螺栓、地脚螺栓、预埋件、全螺纹螺柱
- 主营：螺钉、螺母、膨胀螺丝、螺栓、化学锚栓、自攻钉、钻尾、牙棒、螺杆、注塑螺母、铜螺母、铜柱、幕墙螺丝、不锈钢螺丝、高强度螺丝、组合螺丝、螺丝、化学螺丝、三组合螺丝、门窗钻尾、防松螺母
- 主营：楼梯护角、钢筋马镫、止水钢板、止水螺栓、穿墙螺栓定制、钢筋套筒定制
- 主营：膨胀螺栓厂家、抗震支架
- 主营：发夹销、五金配件、零件定制、高压螺栓、双头螺栓、外六角螺栓、电镀锌螺母、加工模具加、沉头十字螺丝、机械零部件加工
- 主营：不锈钢全螺纹螺柱、不锈钢沉头钻尾、不锈钢六角内膨胀、地脚螺栓、镀锌勾头螺栓、镀锌六角钻尾丝、镀锌膨胀螺栓、高强度双头螺栓、镀锌干挂件、镀锌化学锚栓、热镀锌机械锚栓、热镀锌预埋件、国标地脚螺栓、膨胀六角螺栓、钢结构拉条、焊钉、车修壁虎、高强度弹垫、高强度平垫、不锈钢干挂件、化学锚栓、铝合金挂件、穿山刺砌块螺丝、窗式壁虎、机械锚栓
- 主营：家具螺丝、沉头、自攻丝、高强度螺栓、螺母、铜螺丝、开口销、平弹垫、四爪母、内外牙、平键、建筑类螺丝、全扣丝
- 主营：自攻螺丝、双牙螺丝、外六角自攻丝、双头螺栓、双头牙自攻螺钉、半圆键异型键条、不锈钢机械锚栓、不锈钢化学锚栓、悬挑预埋件、钢管打捆丝、悬挑定位桩、爬架网片、平头内六角、新型连墙件、不锈钢钻尾、不锈钢丝杠
- 主营：钻尾丝、预埋板、防松螺母、法兰螺栓、膨胀螺栓、地脚螺栓、扭剪螺栓、钢结构螺栓、高强度螺栓、热镀锌拉条、膨胀螺丝、蓝白丝杠、六角螺母、花瓣螺母、光伏支架、法兰螺母、化学锚栓、电力金具、弹簧垫片、双头螺丝、一体盖母、激光割板、抗震支架、外六角螺丝、钢结构拉条
- 主营：圆柱销、止退垫、防松螺母、镀锌丝杠、膨胀螺栓、吊环螺栓、花篮螺栓、热镀锌垫片、销轴卡簧、膨胀螺丝、轴承卡簧、螺纹丝棒、薄头螺钉、开口挡圈、尼龙螺母、弹性挡圈、工业齿条、法兰螺母、轴用卡簧、五金垫片、碳钢螺丝、六角铜螺母、不锈钢平键、不锈钢牙条、钢丝绳卡头
- 主营：10.9S钢结构螺栓、Q235B地脚螺栓、3米镀锌丝杆、8.8级高强度外六角、Q355B预埋锚栓
- 主营：不锈钢螺栓、热镀锌螺栓、高强度螺栓、光伏配件
- 主营：临边防护栏杆楼梯扶手、新型方柱扣、电动梁夹具、止水螺栓、U型丝U型螺栓、钢筋加工棚、施工围挡、基坑护栏、u型丝、止水钢板、卸料平台、移动脚手架、工法样板、铝膜配件、钢筋铁马凳、标养室养护箱、试模、新型连墙件、移动定位桩、扣件、爬架网、顶托丝杠、新型蝴蝶扣、钢管底座、阻燃密目网安全网
- 主营：钻尾丝、预埋板、预埋件、镀锌丝杆、镀锌牙条、镀锌丝杠、六角螺栓、螺栓定制、膨胀螺栓、自攻丝、连接件、扣丝杠、扣丝杆、自攻螺丝、防水支架、法兰螺母、六角螺丝、化学锚栓、自攻螺钉、钢筋套筒、弹簧垫片、穿墙丝杠、一体盖母、穿墙螺杆、光伏配件
- 主营：铝合金铆钉、六角螺母、方螺母、六角螺栓、四方螺栓、活节螺栓、圆柱头螺丝、内六角螺丝、十字自攻、沉头螺丝、圆头螺钉、平垫、弹垫、梅花螺钉、非标螺丝、紧定、自攻螺丝、T型螺丝、圆柱销、铆螺母、钻尾螺丝、挡圈、牙条、牙棒
- 主营：建筑螺栓、地脚螺栓、不锈钢螺栓、建筑配件
- 主营：不锈钢螺母、光伏支架、钻尾丝、不锈钢螺栓、膨胀螺栓、高强度螺栓、热镀锌螺栓、全螺纹丝杆