Nuts

Part Number	Description / PDF	Quantity
7211 859 Altech Corporation	PG42 LOCKNUT BLACKPA	550
7211 976 Altech Corporation	M20 LOCKNUT BLACKPA	17466100
7211 887 Altech Corporation	PG29 LOCKNUTLT GRAYPA	468260
7211 860 Altech Corporation	PG48 LOCKNUT BLACKPA	16685
7211 882 Altech Corporation	PG9 LOCKNUTLT GRAYPA	9233550
7211 851 Altech Corporation	PG7 LOCKNUT BLACKPA	17121300
7211 985 Altech Corporation	LOCKNUT NYLON M50 GRY	7630
7211 881 Altech Corporation	PG7 LOCKNUTLT GRAYPA	14864650
7211 496 Altech Corporation	LOCKNUT NYLON 1/2" NPT BLK	33245
7211 486 Altech Corporation	LOCKNUT NYLON 1/2" NPT GRY	12284850
7211 990 Altech Corporation	M40 LOCKNUT BLACKPA	299780
7211 497 Altech Corporation	LOCKNUT NYLON 3/4"NPT BLK	283650
7211 884 Altech Corporation	PG135 LOCKNUTLTGRAYPA	12064250
7211 978 Altech Corporation	M32 LOCKNUT BLACKPA	40600
7211 852 Altech Corporation	PG9 LOCKNUT BLACKPA	13742600
7211 487 Altech Corporation	LOCKNUT NYLON 3/4"NPT GRY	16802125
7211 984 Altech Corporation	M40 LOCKNUT LT GRAYPA	323
7211 979 Altech Corporation	M12 LOCKNUT LT GRAYPA	11711850
7211 890 Altech Corporation	PG48 LOCKNUTLT GRAYPA	535
7211 983 Altech Corporation	M32 LOCKNUT LT GRAYPA	5731550

Nuts

1. Overview

Nuts are threaded fasteners with internal threads designed to mate with bolts or screws to secure mechanical components. As critical elements in assembly systems, nuts provide removable joints that maintain structural integrity under various operational conditions. Their importance spans across industries requiring precision engineering, vibration resistance, and load-bearing capabilities.

2. Major Types and Functional Classification

Type	Functional Characteristics	Application Examples
Hex Nuts	Standard six-sided design with coarse/fine threads, economical and versatile	General machinery assembly
Lock Nuts	Integrated anti-loosening features (nylon insert, distorted thread)	Automotive powertrain systems
Flange Nuts	Integrated washer face reduces surface pressure	Sheet metal applications
Weld Nuts	Projection weld design for permanent metal joining	Steel structure fabrication
Cap Nuts	Protective enclosure for threaded ends	Exterior architectural components

3. Structure and Composition

Typical nut configurations feature a prismatic or cylindrical body with chamfered corners. Key structural elements include:

Hexagonal wrenching surfaces (90% of standard nuts)
Internal ISO metric or Unified thread profiles
Material compositions: Carbon steel (8.8-12.9 grade), Stainless Steel (A2/A4), Brass, Aluminum
Surface treatments: Zinc plating, Geomet coating, Dacromet

4. Key Technical Specifications

Parameter	Importance
Tensile Strength (800-1200 MPa)	Determines load capacity in clamping applications
Hardness (HRC 20-39)	Affects wear resistance and torque performance
Thread Class (6H, 4H)	Defines fit precision with mating bolts
Vibration Resistance	Critical for dynamic load applications
Corrosion Resistance	Measured via salt spray testing ( 72h)

5. Application Fields

Automotive: Engine assembly, chassis systems
Aerospace: Aircraft engine mounts, landing gear
Construction: Steel frame connections, bridge structures
Electronics: PCB mounting, enclosure assembly
Renewable Energy: Wind turbine tower connections

6. Leading Manufacturers and Products

Manufacturer	Representative Products
ITW Shakeproof	Nord-Lock wedge-locking washers and nuts
PEM	SF series flush weld nuts
Hilti	IN fastening systems for concrete applications
Yamawa	High-precision JIS standard nuts

7. Selection Recommendations

Key selection criteria:

Material compatibility with mating bolt (e.g., A2 stainless nut with A2 bolt)
Environmental factors: Temperature range (-50 C to +300 C), chemical exposure
Torque requirements: Proof load specifications
Case Study: Wind turbine tower connections require M64 10.9 grade nuts with 10 m zinc coating

Industry Trends Analysis

Current development directions include:

Advanced materials: Carbon fiber-reinforced polymer nuts for weight reduction
Smart fasteners: Integrated strain sensors for real-time load monitoring
Manufacturing innovation: Cold forming processes achieving G05 dimensional accuracy
Sustainability: Bio-based coatings replacing traditional zinc plating