Nuts

Part Number	Description / PDF	Quantity
0437516HN Richco, Inc. (Essentra Components)	HEX NUT, NATURAL, NYLON, 3/8-16	49818
04M200150WFHN Richco, Inc. (Essentra Components)	HEX FLANGE NUT, M20 X 1.5 THREAD	1000
0431218HJN Richco, Inc. (Essentra Components)	HEX JAM NUT 5/16-18 THREAD .190	990
0456218HJN Richco, Inc. (Essentra Components)	HEX JAM NUT 9/16-18 THREAD .250	980
0500632LCNB Richco, Inc. (Essentra Components)	LOCKING CAP NUT, #6-32 THREAD, .	498
0525020CNB Richco, Inc. (Essentra Components)	CAP NUT 1/4-20 THREAD .475 HEIGH	3500
0537524CNB Richco, Inc. (Essentra Components)	CAP NUT 3/8-24 THREAD .620 HEIGH	1000
0801024TNAB Richco, Inc. (Essentra Components)	THUMB NUT, KNURLED, #10-24 THREA	2000
0487514HJN Richco, Inc. (Essentra Components)	JAM NUTS, NATURAL, NYLON 6/6, 7/	3000
HN-8-32-01 Richco, Inc. (Essentra Components)	HEX NUT 0.338" NYLON 8-32	171
0501032CN Richco, Inc. (Essentra Components)	CAP NUT 10-32 THREAD .400 HEIGHT	771
0500440SCN Richco, Inc. (Essentra Components)	THUMB NUT KNURLED SLOTTED 4-40 T	896
0531218LCN Richco, Inc. (Essentra Components)	CAP NUT, NATURAL, NYLON 6/6, 5/1	10000
0531218CNB Richco, Inc. (Essentra Components)	CAP NUT 5/16-18 THREAD .530 HEIG	992
0601032DECOWN Richco, Inc. (Essentra Components)	DECO WING NUT 10-32 THREAD 7/16	990
0425018PJN Richco, Inc. (Essentra Components)	HEX JAM NUT 1/4-18 THREAD .187 H	900
0537516LCN Richco, Inc. (Essentra Components)	CAP NUT, NATURAL, NYLON 6/6, 3/8	2990
0410008HJN Richco, Inc. (Essentra Components)	JAM NUTS, NATURAL, NYLON 6/6, 1-	2250
0500440CN Richco, Inc. (Essentra Components)	CAP NUT 4-40 THREAD .280 HEIGHT	804
0637516WN Richco, Inc. (Essentra Components)	WING NUT 3/8-16 THREAD .72 HEIGH	975

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