The Extension Rod TTN40 Stud Rod 8 OAL is a short metal stud designed for use as a mechanical extension or coupling link between two components (such as mounting plates, machine frames, structural brackets or assemblies requiring threaded engagement). Its OAL (Overall Length) of 8 means the full rod length from end to end is eight inches. The TTN40 designation likely identifies a specific thread size, material grade or manufacturer series.In effect, this rod serves as a precision stud: one end (or both ends) has a threaded portion that allows secure connection to nuts, couplers or mating threaded components, while the body of the rod acts as a fixed spacer or extension.

Design:

Length: 8 overall length (OAL) ideal for moderate spacing or extension needs.
Threading: One or both ends are threadedmost likely to a given specification consistent with TTN40 series (e.g., thread size, pitch, class). The rod may be doubleended (threads both ends) or singlethreaded with the other end plain, depending on design.
Stud style: Being a stud rod means it lacks a conventional head; it is installed via threaded engagement. This also allows throughbolt style or coupled assembly use.
Material grade and finish: Designed for strength, fatigue resistance and proper alignment/spacer function rather than dynamic movement.
Use as extension: Functions as an extension rod or spacer between components, maintaining alignment and load transfer while allowing for threaded retention.
Tolerance / fit: Rod diameter, thread depth, length tolerance likely conform to manufacturer series; installation should respect torque and preload recommendations.

Applications:

Machine assembly / mounting: Used between mounting flanges where additional length or spacing is needed, e.g., securing a plate to a machine frame where standard bolt is too short.
Structural/support bracketing: Used as a stud extension rod to mount brackets, frames, supports or fixtures where an 8 stud is required.
Coupling multiple assemblies: Enables connection between two threaded couplers or nuts, acting as a spacer in alignment-critical systems.
Repair/retrofit situations: When existing studs are too short or need replacement with a knownlength rod for standardization (8 length in this case).
Instrumentation/fixture application: In tooling or fixturing where a fixed length stud ensures position and load distribution with threaded ends for secure tightening.

Because the rod is relatively short (8) and likely high strength, its suited for static or lightly dynamic loads rather than large deflection or vibration applications; ensures solid fastening with known length.

Materials:

Rod body: Typically made of a hightensile alloy steel (such as ASTM A193 Grade B7, 4140, or similar) that offers high yield strength, fatigue resistance and stable dimensional performance.
Threads: Machined or rolled threads at one or both ends, with recommended class (e.g., 2A/2B or higher) depending on mating parts. Thread roots and transitions should be properly relieved and chamfered.
Surface finish/coating: May be plain/uncoated steel or may have a corrosionresistant plating (e.g., zincnickel, hotdip galvanized, or passivated) depending on environment. If used in structural or outdoor context, corrosion protection is advisable.
Heat treatment: If made from alloy steel, the rod may be quenched and tempered (e.g., 4140 QT) or case hardened, to provide desired strength and fatigue life.
Quality control: The rod should meet dimensional tolerances (length as specified), straightness, thread form, and mechanical properties (yield, tensile, elongation) per the manufacturers series spec.
Sealing/protection features: If the rod interfaces with hydraulic or precision applications, sometimes the rod ends may include sealed studs or protective caps, though not always required.

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