Nuts

Part Number	Description / PDF	Quantity
0700832SLN Richco, Inc. (Essentra Components)	LOCK AND FLANGE NUT, NATURAL, NY	30990
0400440HNPC Richco, Inc. (Essentra Components)	HEX NUT 4-40 THREAD .100 HEIGHT	816
583-7/8-9-ST J.W. Winco	STEEL LIFTING EYE NUT	30
0531218LCNB Richco, Inc. (Essentra Components)	LOCKING CAP NUT 5/16-18 THREAD .	1000
05M200250CN Richco, Inc. (Essentra Components)	CAP NUT M20 X 2.5 THREAD 29.1 HE	1000
583-3/8-16-ST J.W. Winco	STEEL LIFTING EYE NUT	98
0600440DECOWN Richco, Inc. (Essentra Components)	DECO WING NUT 4-40 THREAD 5/16 H	935
4343 Keystone Electronics Corp.	BLIND CAPTIVE NUT 13/32" NYLON	2300
C6635-4 CIT (Carlisle Interconnect Technologies)	NUT, PRESS FIT	0
M3561-SS RAF	8MM RD X 6MM X M3	207
0437532HJN Richco, Inc. (Essentra Components)	HEX JAM NUT 3/8-32 THREAD .125 H	700
6-32 AJ 6 APM Hexseal	HEX SEAL NUT 5/16" STEEL 6-32	709
0550020CNB Richco, Inc. (Essentra Components)	CAP NUT 1/2-20 THREAD .810 HEIGH	1000
583-1-8-ST J.W. Winco	STEEL LIFTING EYE NUT	30
7211 990 Altech Corporation	M40 LOCKNUT BLACKPA	299780
0475010HN Richco, Inc. (Essentra Components)	HEX NUT, NATURAL, NYLON, 3/4-10	9989
0425028HFN Richco, Inc. (Essentra Components)	HEX FLANGE NUT 1/4-28 THREAD .58	950
0450028HJN Richco, Inc. (Essentra Components)	HEX JAM NUT 1/2-28 THREAD .125 H	612
9603 Keystone Electronics Corp.	HEX NUT 1/4" STEEL 8-32	238412300
0400440HN Richco, Inc. (Essentra Components)	HEX NUT 4-40 THREAD .100 HEIGHT	12443

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