Nuts

Part Number	Description / PDF	Quantity
18029-6 TE Connectivity AMP Connectors	NUT, HEX, METRIC SERIES, DIN 934	0
6604726 Altech Corporation	ADAPTER M25 TOPG16 NICKEL-PLATED	0
7005303 Altech Corporation	REDUCERPG11 TOPG9POLYAMIDE LIGHT	76
1694100000 Weidmuller	LOCK NUT 0.906" BRASS PG13.5	0
21022-6 TE Connectivity AMP Connectors	NUT,HEX,SELF-LKG,THIN	0
7008516 Altech Corporation	REDUCER M16 TO M12POLYAMIDE LIGH	50
6102140 Altech Corporation	REDUCERPG36 TOPG135 HEX NICKELPL	0
1-21021-1 TE Connectivity AMP Connectors	NUT,HEX,SELF-LOCKING	0
0450014PJN Richco, Inc. (Essentra Components)	HEX JAM NUT 1/2-14 THREAD .340 H	1000
0437532HN Richco, Inc. (Essentra Components)	HEX NUT 3/8-32 THREAD .330 HEI	0
0643714WN Richco, Inc. (Essentra Components)	WING NUT 7/16-14 THREAD .90 HEIG	1000
21-0026 APEM Inc.	8MM HEX NUT	0
0450020HJN Richco, Inc. (Essentra Components)	HEX JAM NUT 1/2-20 THREAD .220 H	894
7008524 Altech Corporation	REDUCER M25 TO M16POLYAMIDE LIGH	50
CGLN-PG21-BK Richco, Inc. (Essentra Components)	LOCK NUT 1.417" NYLON PG21	0
6004253 Altech Corporation	M25 LOCKNUT BN	375
6604704 Altech Corporation	ADAPTER M50 TOPG21 NICKEL-PLATED	0
6000169 Altech Corporation	PG16 LOCKNUT BN	50
21018-8 TE Connectivity AMP Connectors	NUT,HEX,MACH SCREW	0
6604819 Altech Corporation	ADAPTERPG16 TO M25 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