20X78 — STUD,SHOULDERED

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

20X78: STUD,SHOULDERED.

The STUD,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 3120H OR STEEL COMP 8620H, thread_length: 0.875 INCHES MAXIMUM STUD THREAD IN, hardness_rating: 18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM, thread_direction: RIGHT-HAND NUT THREAD, nominal_thread_size: 0.750 INCHES NUT THREAD IN, thread_pitch_diameters: +0.7044 TO 0.7084 INCHES STUD THREAD IN. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-514-6832, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

20X78

NSN: 5307-00-514-6832
FSC: 5307 — Studs
CAGE: 78500 — MERITOR HEAVY VEHICLE SYSTEMS, LLC (USA)

SPECIFICATIONS

material	STEEL COMP 3120H OR STEEL COMP 8620H
thread_length	0.875 INCHES MAXIMUM STUD THREAD IN
hardness_rating	18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM
special_features	FIRST SHOULDER BLENDS WITH A 5.0 DEG TAPER INTO SECOND SHOULDER; 0.125 IN. TO 0.187 IN RADIUS THREAD RELIEF UNDER WRENCHING FLAT SHOULDER IN
thread_direction	RIGHT-HAND NUT THREAD
nominal_thread_size	0.750 INCHES NUT THREAD IN
thread_pitch_diameters	+0.7044 TO 0.7084 INCHES STUD THREAD IN
thread_quantity_per_inch	16 NUT THREAD
thread_series_designator	UNS NUT THREAD
material_document_and_classification	QQ-S-624 FED SPEC ALL MATERIAL RESPONSES
NSN	5307-00-514-6832

COMPONENT DIAGRAM

KEY FEATURES

•

THREAD LENGTH: 0.875 INCHES MAXIMUM STUD THREAD IN

•

HARDNESS RATING: 18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM

•

THREAD PITCH DIAMETERS: +0.7044 TO 0.7084 INCHES NUT THREAD IN

•

MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-624 FED SPEC ALL MATERIAL RESPONSES

•

THREAD DIRECTION: RIGHT-HAND STUD THREAD

TECHNICAL CHARACTERISTICS

THREAD LENGTH	0.875 INCHES MAXIMUM STUD THREAD IN
THREAD LENGTH	1.156 INCHES MAXIMUM NUT THREAD IN
HARDNESS RATING	18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM
THREAD PITCH DIAMETERS	+0.7044 TO 0.7084 INCHES NUT THREAD IN
THREAD PITCH DIAMETERS	+0.7044 TO 0.7084 INCHES STUD THREAD IN
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-624 FED SPEC ALL MATERIAL RESPONSES
THREAD DIRECTION	RIGHT-HAND STUD THREAD
THREAD DIRECTION	RIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE	0.750 INCHES STUD THREAD IN
NOMINAL THREAD SIZE	0.750 INCHES NUT THREAD IN

SUBSTITUTES & CROSS-REFERENCES 2

536077Reference document

Same NSN cross-reference

Reference document — Secondary reference

16856Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 20X78?

20X78 is a STUD,SHOULDERED.

What parts can replace 20X78?

There are 2 known substitutes for 20X78: 536077, 16856. Substitute compatibility should be verified for your specific system.

What is the NSN for 20X78?

20X78 is cataloged in the U.S. Government catalog under NSN 5307-00-514-6832. This indicates validated use in U.S. government and defense supply chains.

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