Nuts

Part Number	Description / PDF	Quantity
7211 974 Altech Corporation	M12 LOCKNUT BLACKPA	24501050
7211 986 Altech Corporation	M63 LOCKNUT LT GRAYPA	350
7211 856 Altech Corporation	PG21 LOCKNUT BLACKPA	730775
7211 888 Altech Corporation	PG36 LOCKNUTLT GRAYPA	23750
7211 980 Altech Corporation	M16 LOCKNUT LT GRAYPA	16322200
7211 498 Altech Corporation	NPT1 LOCKNUTPA BK	4431460
7211 975 Altech Corporation	M16 LOCKNUT BLACKPA	19927850
7211 981 Altech Corporation	LOCKNUT NYLON M20 GRY	11006250
7211 854 Altech Corporation	LOCKNUT NYLON PG13.5 BLK	9388050
7211 992 Altech Corporation	M63 LOCKNUT BLACKPA	16540
7211 855 Altech Corporation	PG16 LOCKNUT BLACKPA	3452400
7211 982 Altech Corporation	M25 LOCKNUT LT GRAYPA	684600
7211 488 Altech Corporation	NPT1 LOCKNUTPA GRAY	315360
7211 857 Altech Corporation	PG29 LOCKNUT BLACKPA	220960
7211 889 Altech Corporation	PG42 LOCKNUTLT GRAYPA	350
7211 886 Altech Corporation	PG21 LOCKNUTLT GRAYPA	7545675
7211 883 Altech Corporation	PG11 LOCKNUTLT GRAYPA	13766700
7211 853 Altech Corporation	LOCKNUT NYLON PG11 BLK	13703600
7211 977 Altech Corporation	M25 LOCKNUT BLACKPA	6541550
7211 485 Altech Corporation	NPT3/8 LOCKNUTPA GRAY	303150

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