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S1620-61284 — BOLT,INTERNAL WRENCHING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

S1620-61284: BOLT,INTERNAL WRENCHING.

The BOLT,INTERNAL WRENCHING is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: BEVEL-CONICAL, head_height: 0.836 INCHES MINIMUM AND 0.856 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 1.424 INCHES MINIMUM AND 1.438 INCHES MAXIMUM IN, thread_length: 1.062 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-208-0574, 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
S1620-61284
NSN: 5306-00-208-0574
FSC: 5306 — Bolts
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleBEVEL-CONICAL
head_height0.836 INCHES MINIMUM AND 0.856 INCHES MAXIMUM IN
thread_class3A A
head_diameter1.424 INCHES MINIMUM AND 1.438 INCHES MAXIMUM IN
thread_length1.062 INCHES NOMINAL IN
fastener_length4.1875 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats0.7507 INCHES MINIMUM AND 0.7547 INCHES MAXIMUM IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.875 INCHES IN
NSN5306-00-208-0574
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: S1620-61284 · 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
•
WIDTH ACROSS FLATS: 0.7507 INCHES MINIMUM AND 0.7547 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.836 INCHES MINIMUM AND 0.856 INCHES MAXIMUM IN
•
FASTENER LENGTH: 4.1875 INCHES NOMINAL IN
•
THREAD LENGTH: 1.062 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: NAS159 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.875 INCHES IN
•
HEAD STYLE: BEVEL-CONICAL
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.7507 INCHES MINIMUM AND 0.7547 INCHES MAXIMUM IN
HEAD HEIGHT0.836 INCHES MINIMUM AND 0.856 INCHES MAXIMUM IN
FASTENER LENGTH4.1875 INCHES NOMINAL IN
THREAD LENGTH1.062 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONNAS159 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.875 INCHES IN
HEAD STYLEBEVEL-CONICAL
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTCADMIUM OVERALL
INTERNAL DRIVE STYLEHEXAGON
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is S1620-61284?
S1620-61284 is a BOLT,INTERNAL WRENCHING.
What is the NSN for S1620-61284?
S1620-61284 is cataloged in the U.S. Government catalog under NSN 5306-00-208-0574. 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.