Nuts

Part Number	Description / PDF	Quantity
7217-SS RAF	5/8HD X 13/32 X 5/16-18 THD	200
5205821-3 TE Connectivity AMP Connectors	HEX NUT 0.184" STEEL 4-40	0
HNSS 832 B&F Fastener Supply	HEX NUT 11/32" STN STEEL 8-32	0
7211 495 Altech Corporation	LOCKNUT NYLON 3/8 NPT BLK	111610450
M3563-SS RAF	10MM RD X 7MM X M4	0
6604730 Altech Corporation	ADAPTER M32 TOPG21 NICKEL-PLATED	0
6102077 Altech Corporation	REDUCERPG135 TOPG11 HEX NICKELPL	0
21021-4 TE Connectivity AMP Connectors	NUT,HEX,SELF-LOCKING	0
6604850 Altech Corporation	ADAPTERPG48 TO M75 NICKEL-PLATED	0
1301830008 Woodhead - Molex	M16 X 1.5 LOCKNUT NICKEL PLATED	0
21018-4 TE Connectivity AMP Connectors	NUT,HEX,MACH SCREW	0
0468727HN Richco, Inc. (Essentra Components)	HEX NUT 11/16-27 THREAD .250 H	0
7008525 Altech Corporation	REDUCER M25 TO M20POLYAMIDE LIGH	200
6604716 Altech Corporation	ADAPTER M16 TOPG9 NICKEL-PLATED	0
1442505 Richco, Inc. (Essentra Components)	KWIK NUT 0.370" NYLON M4	4960
21019-3 TE Connectivity AMP Connectors	NUT,HEX,HEAVY	0
18029-1 TE Connectivity AMP Connectors	NUT, HEX, METRIC SERIES, DIN 934	0
6604822 Altech Corporation	ADAPTERPG21 TO M32 NICKEL-PLATED	0
0475014PJN Richco, Inc. (Essentra Components)	HEX JAM NUT 3/4-14 THREAD .410 H	1000
6102419 Altech Corporation	REDUCER M40 TO M25 HEX NICKELPLA	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