Nuts

Part Number	Description / PDF	Quantity
3-1616338-8 TE Connectivity Aerospace Defense and Marine	50407444=NUT 3/8-32 BRASS	0
6402102 Altech Corporation	ADAPTER NPT 1 12" TOPG48 NICKEL-	0
6102030 Altech Corporation	REDUCERPG11 TOPG7 HEX NICKELPLAT	0
6102069 Altech Corporation	REDUCERPG21 TOPG9 HEX NICKELPLAT	0
7004201 Altech Corporation	ENLARGERPG 9 TOPG 11POLYAMIDE LI	0
6102026 Altech Corporation	REDUCERPG135 TOPG7 HEX NICKELPLA	0
18355.9 Conta-Clip	NPT11/4" LOCKNUT NPB	0
0450014SJN Richco, Inc. (Essentra Components)	HEX JAM NUT 1/2-14 THREAD .340 H	1000
SBNUT31-C Panduit Corporation	5/16-18 UNC HEX NUT SILICONE BRO	0
6200216 Altech Corporation	ENLARGER M16 TO M20 ROUND NICKEL	0
1772440000 Weidmuller	LOCK NUT 0.709" POLYAMIDE M12	0
6604821 Altech Corporation	ADAPTERPG21 TO M25 NICKEL-PLATED	0
1719210000 Weidmuller	LOCK NUT 1.614" BRASS PG29	0
7004302 Altech Corporation	ENLARGER M20 TO M25POLYAMIDE LIG	0
21021-6 TE Connectivity AMP Connectors	NUT,HEX,SELF-LOCKING	0
560-9049-012 Vitelec / Cinch Connectivity Solutions	HEX NUT	0
6604735 Altech Corporation	ADAPTER M40 TOPG29 NICKEL-PLATED	0
7005310 Altech Corporation	REDUCERPG21 TOPG11POLYAMIDE LIGH	100
6011009 Altech Corporation	PG9 LOCKNUT RIBBED BN	500
A8236 American Electrical, Inc.	LOCK NUT NYLON PG36	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