Nuts

Part Number	Description / PDF	Quantity
7005302 Altech Corporation	REDUCERPG11 TOPG7POLYAMIDE LIGHT	0
6102255 Altech Corporation	REDUCERPG48 TOPG36 HEX NICKELPLA	0
6402054 Altech Corporation	ADAPTER NPT 12" TOPG135 NICKEL-P	0
6011016 Altech Corporation	PG16 LOCKNUT RIBBED BN	500
7004200 Altech Corporation	ENLARGERPG 7 TOPG 9POLYAMIDE LIG	0
6200212 Altech Corporation	ENLARGER M12 TO M16 ROUND NICKEL	0
7004301 Altech Corporation	ENLARGER M16 TO M20POLYAMIDE LIG	0
6200225 Altech Corporation	ENLARGER M25 TO M32 ROUND NICKEL	0
6011029 Altech Corporation	PG29 LOCKNUT RIBBED BN	260
6604813 Altech Corporation	ADAPTERPG11 TO M20 NICKEL-PLATED	0
6102400 Altech Corporation	REDUCER M16 TO M12 HEX NICKELPLA	0
6011013 Altech Corporation	PG135 LOCKNUT RIBBED BN	300
6102405 Altech Corporation	REDUCER M20 TO M16 HEX NICKELPLA	0
6604811 Altech Corporation	ADAPTERPG9 TO M20 NICKEL-PLATED	0
6402070 Altech Corporation	ADAPTER NPT 34" TOPG16 NICKEL-PL	0
6104727 Altech Corporation	REDUCER M25 TOPG16 RIBBED NICKEL	0
6102212 Altech Corporation	REDUCERPG48 TOPG21 HEX NICKELPLA	0
6102018 Altech Corporation	REDUCERPG9 TOPG7 HEX NICKELPLATE	0
7004208 Altech Corporation	ENLARGERPG42 TOPG48POLYAMIDE LIG	0
7005309 Altech Corporation	REDUCERPG16 TOPG135POLYAMIDE LIG	0

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