Nuts

Part Number	Description / PDF	Quantity
7005305 Altech Corporation	REDUCERPG135 TOPG9POLYAMIDE LIGH	100
7004206 Altech Corporation	ENLARGERPG29 TOPG36POLYAMIDE LIG	0
6402089 Altech Corporation	ADAPTER NPT 1" TOPG21 NICKEL-PLA	0
6004504 Altech Corporation	M50 LOCKNUT BN	795
6011116 Altech Corporation	M16 LOCKNUT RIBBED BN	2200
6604814 Altech Corporation	ADAPTERPG11 TO M25 NICKEL-PLATED	50
6604720 Altech Corporation	ADAPTER M20 TOPG11 NICKEL-PLATED	0
6200363 Altech Corporation	ENLARGER M63 TO M75 HEX NICKEL-P	0
6604817 Altech Corporation	ADAPTERPG135 TO M25 NICKEL-PLATE	0
6604727 Altech Corporation	ADAPTER M25 TOPG29 NICKEL-PLATED	0
7004203 Altech Corporation	ENLARGERPG135 TOPG16POLYAMIDE LI	0
6102158 Altech Corporation	REDUCERPG21 TOPG7 HEX NICKELPLAT	0
6200263 Altech Corporation	ENLARGER M63 TO M75 ROUND NICKEL	0
6604818 Altech Corporation	ADAPTERPG16 TO M20 NICKEL-PLATED	0
7004305 Altech Corporation	ENLARGER M40 TO M50POLYAMIDE LIG	0
6102430 Altech Corporation	REDUCER M63 TO M50 HEX NICKELPLA	0
6400408 Altech Corporation	ADAPTERPG21 TO NPT1" NICKEL-PLAT	0
7008519 Altech Corporation	REDUCER M20 TO M12POLYAMIDE LIGH	0
6200240 Altech Corporation	ENLARGER M40 TO M50 ROUND NICKEL	0
6011120 Altech Corporation	M20 LOCKNUT RIBBED BN	100

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