Hex Nuts

Hardware

Sourcing the right hex nuts for an aerospace build means matching exact specifications to a mission-critical joint, and getting it wrong costs more than money. A hex nut that doesn't meet the specified material, plating, or torque rating can compromise an entire assembly. FDH Hardware solves that problem with a fully traceable inventory of hex nuts built to the exact military, NAS, and OEM specifications that aerospace and defense programs require.

Specification Families We Carry

Our hex nuts catalog spans the specification families engineers actually call out on drawings: AN (AN310, AN315), MS (MS14144 through MS51943), NAS (NAS679, NAS1291, NAS1726, NAS1804, NAS1805, NAS1870), BAC (BACN, BACR, BACS, BACW), the NASM-superseded M45913, M45595, and M45938 series, and NA-prefixed hardware, plus special or custom configurations for parts that don't fall under a standard callout. Every part ships with the documentation needed to prove traceability back to the original manufacturer.

Applications Across the Airframe

Hex nuts from this catalog support structural assembly across the airframe, including wing and fuselage skin attachment, engine cowling and nacelle installation, access panel and inspection cover retention, avionics bay mounting, and interior fairing work. Ground support equipment and tooling used to service aircraft on the line rely on the same hardware families, since the fit, finish, and load requirements carry over from flight hardware to shop equipment.

Hex Nut Configurations Explained

Several distinct hex nut styles are available in this catalog, and each is engineered for a specific fastening, load, or environmental challenge. Plain hex nut designs provide standard mechanical fastening for joints where both sides of the connection are accessible with a wrench, making them the go-to choice for non-critical, low-vibration assemblies. Castellated (castle) hex nut designs feature a slotted crown that accepts a cotter pin through a drilled bolt shank, giving technicians a mechanical anti-rotation lock that holds up in high-heat zones where an elastic locking feature would break down. Self-locking hex nuts with an elastic insert use a nylon or fiber locking collar to create prevailing torque that resists vibration loosening, making them well suited to moderate-temperature applications where a reusable, non-metallic locking feature is preferred. Self-locking hex nuts with an all-metal locking feature rely on a deformed thread section rather than an insert, so there's no elastic material to degrade — a requirement on parts exposed to high heat, fuel, or hydraulic fluid over repeated installation and removal cycles. High-strength, low-height hex locknut designs pair a reduced hex profile with high-tensile steel construction, saving weight and clearance space on structural load paths while still holding up under extreme temperature swings. Special and OEM-spec hex nut designs are built to prime manufacturer specifications, such as Boeing-spec (BAC) hex nuts, for programs that require hardware matched to an exact airframe requirement rather than a general AN or MS standard.

Materials and Traceability

Material options across the catalog include cadmium-plated alloy steel, corrosion-resistant stainless, and other platings suited to the operating environment, from pressurized cabin interiors to exposed exterior surfaces. Every part in the catalog carries full lot traceability, and quality documentation is available on request to support program audits and incoming inspection requirements.

Request a Quote

If a specific hex nut, nut plate configuration, or special hardware item isn't listed in the catalog, our team can still source it. Browse the full hardware catalog alongside related product lines like key-locking inserts and wire inserts, or reach out through our contact page with a part number, drawing callout, or quantity, and we'll get a quote back to you.

Applications

Wing and fuselage skin attachment
Engine cowling and nacelle installation
Access panel and inspection cover retention
Avionics bay and instrument panel mounting
Interior cabin fairing and structural panel installation
Wing root and control surface fairing attachment
Ground support equipment and maintenance tooling

Features

Compliance with AN, MS, NAS, BAC, and NASM specifications
Full material traceability and lot documentation
Cadmium, zinc, and corrosion-resistant stainless finish options
High-strength alloy configurations for structural load paths
Self-locking designs rated for repeated installation cycles
Fixed and floating nut plate configurations for blind-mount panels
Custom and hard-to-find part sourcing on request

Hex Nut Specifications We Stock

Family	Specifications	Description
AN	AN310, AN315	Air Force-Navy standard hex nuts, among the earliest standardized aerospace hex nut designs
MS	MS14144, MS17825-MS17830, MS20364, MS21042-MS21046, MS21245, MS51552, MS51922, MS51943	Military Standard hex nuts and self-locking nuts covering a wide range of thread sizes and load ratings
NAS	NAS679, NAS1291, NAS1726, NAS1804, NAS1805, NAS1870	National Aerospace Standard nuts, often specified for higher-strength or weight-critical applications
BAC	BACN, BACR, BACS, BACW	Boeing-specification nut plates and hex nuts used across commercial airframe programs
NASM (M4591x series)	M45913, M45595, M45938	Current NASM-designated parts that superseded legacy MS numbers
NA	NA0033, NA0034	NA-prefixed aerospace hardware
Special	SPECIAL	Custom configurations for non-standard callouts

FAQs

Are anchor nut plates the same thing as hex nuts?

Anchor nut plates are a riveted, captive version of a hex nut, designed for blind-mount locations where a technician can't reach the back side of the panel with a wrench. They serve the same fastening function as a standard hex nut but solve an access problem that a loose nut can't.

What specifications do FDH Hardware's hex nuts meet?

Our hex nuts catalog covers AN, MS, NAS, BAC, and NASM-designated part families, along with NA-prefixed hardware and special configurations. Every part is sourced from authorized manufacturers with full traceability documentation available.

Can I order a hex nut or nut plate that isn't listed in the catalog?

Yes. If a specific part number, drawing callout, or configuration isn't listed, our team can source it. Submit a quote request through the catalog or contact us directly with the details.

	FDH Electronics
	Shipping Address: 3601 N I-35 Service Road Oklahoma City, OK 73111	Billing Address: PO Box 11456 Oklahoma City, OK 73136	Toll Free: 800. 324.6591 Phone: 405.427.6591 Fax: 405.424.0056 ok.sales@electroenterprises.com

FDH Electronics

Hardware

Hex Nuts

Hex Nuts

Specification Families We Carry

Applications Across the Airframe

Hex Nut Configurations Explained

Materials and Traceability

Request a Quote

Applications

Features

Hex Nut Specifications We Stock

FAQs

Are anchor nut plates the same thing as hex nuts?

What specifications do FDH Hardware's hex nuts meet?

Can I order a hex nut or nut plate that isn't listed in the catalog?

Visit Us

Call Us

Request a Quote