Nuts

Part Number	Description / PDF	Quantity
6200028 Altech Corporation	ENLARGERPG9 TOPG11 ROUND NICKEL-	0
7211 885 Altech Corporation	PG16 LOCKNUTLT GRAYPA	1200
6000070 Altech Corporation	PG7 LOCKNUT BN	250
6604724 Altech Corporation	ADAPTER M25 TOPG135 NICKEL-PLATE	0
6200109 Altech Corporation	ENLARGERPG29 TOPG36 ROUND NICKEL	0
6402317 Altech Corporation	ADAPTER M16 TO NPT12" NICKEL-PLA	0
6102107 Altech Corporation	REDUCERPG29 TOPG11 HEX NICKELPLA	0
6010125 Altech Corporation	M25 LOCKNUT STAINLESS STEEL INOX	25
6102123 Altech Corporation	REDUCERPG21 TOPG135 HEX NICKELPL	0
6000215 Altech Corporation	PG21 LOCKNUT BN	260
7005313 Altech Corporation	REDUCERPG29 TOPG135POLYAMIDE LIG	0
6200010 Altech Corporation	ENLARGERPG7 TOPG9 ROUND NICKEL-P	0
6000118 Altech Corporation	PG11 LOCKNUT BN	250
6200320 Altech Corporation	ENLARGER M20 TO M25 NICKEL-PLATE	0
7005312 Altech Corporation	REDUCERPG21 TOPG16POLYAMIDE LIGH	0
6604728 Altech Corporation	ADAPTER M32 TOPG16 NICKEL-PLATED	0
6102258 Altech Corporation	REDUCERPG48 TOPG42 HEX NICKELPLA	0
6102050 Altech Corporation	REDUCERPG16 TOPG9 HEX NICKELPLAT	0
6400410 Altech Corporation	ADAPTERPG29 TO NPT1 14" NICKEL-P	0
6604715 Altech Corporation	ADAPTER M16 TOPG11 NICKEL-PLATED	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