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Technical Data Sheet
PartsTable / COMPONENT / MS27978-6N
MS27978-6N ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The STUD,SNAP FASTENER is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, body_length: 0.188 INCHES NOMINAL IN, stud_shank_length: 0.312 INCHES NOMINAL IN, surface_treatment: NICKEL OVERALL, stud_overall_length: 0.625 INCHES NOMINAL IN, stud_retention_method: SCREW BASE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-276-4920, 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
MS27978-6N
NSN: 5325-00-276-4920
FSC: 5325
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
body_length0.188 INCHES NOMINAL IN
stud_shank_length0.312 INCHES NOMINAL IN
surface_treatmentNICKEL OVERALL
stud_overall_length0.625 INCHES NOMINAL IN
stud_retention_methodSCREW BASE
snap_fastener_stud_styleSTUD
stud_base_width_across_flats0.250 INCHES NOMINAL IN
thread_size_and_series/type_designator0.138-32 UNIFIED NATIONAL COARSE (UNC)
NSN5325-00-276-4920
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS27978-6N · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: COPPER ALLOY OVERALL
•
STUD SHANK LENGTH: 0.312 INCHES NOMINAL IN
•
STUD RETENTION METHOD: SCREW BASE
•
SURFACE TREATMENT: NICKEL OVERALL
•
STUD BASE WIDTH ACROSS FLATS: 0.250 INCHES NOMINAL IN
•
STUD OVERALL LENGTH: 0.625 INCHES NOMINAL IN
•
BODY LENGTH: 0.188 INCHES NOMINAL IN
•
SNAP FASTENER STUD STYLE: STUD
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY OVERALL
STUD SHANK LENGTH0.312 INCHES NOMINAL IN
STUD RETENTION METHODSCREW BASE
SURFACE TREATMENTNICKEL OVERALL
STUD BASE WIDTH ACROSS FLATS0.250 INCHES NOMINAL IN
STUD OVERALL LENGTH0.625 INCHES NOMINAL IN
BODY LENGTH0.188 INCHES NOMINAL IN
SNAP FASTENER STUD STYLESTUD
THREAD SIZE AND SERIES/TYPE DESIGNATOR0.138-32 UNIFIED NATIONAL COARSE (UNC)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
TF120/20SCFP VARInterchangeable
interchangeable cross-reference
interchangeable
17302Interchangeable
interchangeable cross-reference
interchangeable
TF120/20SCFP VAR AInterchangeable
interchangeable cross-reference
interchangeable
565598Interchangeable
interchangeable cross-reference
interchangeable
663000Interchangeable
interchangeable cross-reference
interchangeable
16296Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS27978-6N?
MS27978-6N is a STUD,SNAP FASTENER.
What parts can replace MS27978-6N?
There are 21 known substitutes for MS27978-6N: TF120/20SCFP VAR, 17302, TF120/20SCFP VAR A and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS27978-6N?
MS27978-6N is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-276-4920. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026