Nuts

Part Number	Description / PDF	Quantity
18029-3 TE Connectivity AMP Connectors	NUT, HEX, METRIC SERIES, DIN 934	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
9-329631-0 TE Connectivity AMP Connectors	JAM NUT	0
6102158 Altech Corporation	REDUCERPG21 TOPG7 HEX NICKELPLAT	0
21018-3 TE Connectivity AMP Connectors	NUT,HEX,MACH SCREW	0
5-1616338-4 TE Connectivity Aerospace Defense and Marine	50408011=NUT 8-32 1/4-DIA 3/32	0
04M040070HN Richco, Inc. (Essentra Components)	HEX NUT 0.270" NYLON M4	438
6200263 Altech Corporation	ENLARGER M63 TO M75 ROUND NICKEL	0
6604818 Altech Corporation	ADAPTERPG16 TO M20 NICKEL-PLATED	0
6-1616922-3 TE Connectivity Aerospace Defense and Marine	50407567=NUT, 3/4-20	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
1697450000 Weidmuller	LOCK NUT 0.866" POLYAMIDE PG9	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
7004204 Altech Corporation	ENLARGERPG16 TOPG21POLYAMIDE LIG	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