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VS2978A05D017 — BOLT,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

VS2978A05D017: BOLT,CLOSE TOLERANCE.

The BOLT,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL COMP H11 OVERALL, head_style: DOUBLE HEXAGON, grip_length: 1.062 INCHES NOMINAL IN, head_height: 0.187 INCHES NOMINAL IN, thread_class: 3A A, grip_diameter: 0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-528-0307, 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
VS2978A05D017
NSN: 5306-01-528-0307
FSC: 5306 — Bolts
CAGE: 92215 — HOWMET GLOBAL FASTENING SYSTEMS INC DIV TORRANCE OPERATIONS (USA)
SPECIFICATIONS
materialSTEEL COMP H11 OVERALL
head_styleDOUBLE HEXAGON
grip_length1.062 INCHES NOMINAL IN
head_height0.187 INCHES NOMINAL IN
thread_class3A A
grip_diameter0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
thread_length0.351 INCHES NOMINAL IN
fastener_length1.413 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentCHROMATE AND NICKEL AND CADMIUM OVERALL
width_between_flats0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
end_item_identificationC-5 AIRCRAFT
NSN5306-01-528-0307
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: VS2978A05D017 · 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
•
HEAD HEIGHT: 0.187 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.413 INCHES NOMINAL IN
•
THREAD LENGTH: 0.351 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
HEAD STYLE: DOUBLE HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
•
GRIP LENGTH: 1.062 INCHES NOMINAL IN
•
WIDTH BETWEEN FLATS: 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.187 INCHES NOMINAL IN
FASTENER LENGTH1.413 INCHES NOMINAL IN
THREAD LENGTH0.351 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLEDOUBLE HEXAGON
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH1.062 INCHES NOMINAL IN
WIDTH BETWEEN FLATS0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
GRIP DIAMETER0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
SURFACE TREATMENTCHROMATE AND NICKEL AND CADMIUM OVERALL
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES 2
STSBG000A05D017Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
BM3200-5A017DSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is VS2978A05D017?
VS2978A05D017 is a BOLT,CLOSE TOLERANCE.
What parts can replace VS2978A05D017?
There are 2 known substitutes for VS2978A05D017: STSBG000A05D017, BM3200-5A017D. Substitute compatibility should be verified for your specific system.
What is the NSN for VS2978A05D017?
VS2978A05D017 is cataloged in the U.S. Government catalog under NSN 5306-01-528-0307. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.