Nuts

Part Number	Description / PDF	Quantity
7004204 Altech Corporation	ENLARGERPG16 TOPG21POLYAMIDE LIG	100
6604816 Altech Corporation	ADAPTERPG135 TO M20 NICKEL-PLATE	0
6604829 Altech Corporation	ADAPTERPG29 TO M25 NICKEL-PLATED	0
7005314 Altech Corporation	REDUCERPG29 TOPG16POLYAMIDE LIGH	0
6402316 Altech Corporation	ADAPTER M16 TO NPT38" NICKEL-PLA	0
6604815 Altech Corporation	ADAPTERPG135 TO M16 NICKEL-PLATE	0
6011021 Altech Corporation	PG21 LOCKNUT RIBBED BN	100
7005307 Altech Corporation	REDUCERPG16 TOPG 9POLYAMIDE LIGH	0
6102415 Altech Corporation	REDUCER M32 TO M25 HEX NICKELPLA	0
7004306 Altech Corporation	ENLARGER M50 TO M63POLYAMIDE LIG	0
7008563 Altech Corporation	REDUCER M63 TO M50POLYAMIDE LIGH	10
6402321 Altech Corporation	ADAPTER M20 TO NPT12" NICKEL-PLA	0
7004304 Altech Corporation	ENLARGER M32 TO M40POLYAMIDE LIG	0
6102182 Altech Corporation	REDUCERPG48 TOPG16 HEX NICKELPLA	0
6102241 Altech Corporation	REDUCERPG42 TOPG36 HEX NICKELPLA	0
6102131 Altech Corporation	REDUCERPG29 TOPG135 HEX NICKELPL	0
6000290 Altech Corporation	PG29 LOCKNUT BN	180
6604712 Altech Corporation	ADAPTER M12 TOPG7 NICKEL-PLATED	0
6402072 Altech Corporation	ADAPTER NPT 34" TOPG21 NICKEL-PL	0
7005304 Altech Corporation	REDUCERPG135 TOPG7POLYAMIDE LIGH	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