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1539591 — SCREW,CAP,SOCKET HEAD

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

1539591: SCREW,CAP,SOCKET HEAD.

The SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT CHAMFER, head_height: 0.164 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.270 INCHES MAXIMUM IN, thread_length: 0.812 INCHES MINIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-916-6986, 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
1539591
NSN: 5305-00-916-6986
FSC: 5305 — Screws
CAGE: 64547 — HONEYWELL INTERNATIONAL, INC DIV AEROSPACE-TUCSON (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
head_height0.164 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.270 INCHES MAXIMUM IN
thread_length0.812 INCHES MINIMUM IN
fastener_length0.875 INCHES NOMINAL IN
hardness_rating38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_across_flats0.125 INCHES NOMINAL IN
internal_drive_styleHEXAGON
NSN5305-00-916-6986
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1539591 · 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: 0.125 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.164 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.875 INCHES NOMINAL IN
•
THREAD LENGTH: 0.812 INCHES MINIMUM IN
•
HARDNESS RATING: 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL
•
NOMINAL THREAD DIAMETER: 0.164 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.125 INCHES NOMINAL IN
HEAD HEIGHT0.164 INCHES MAXIMUM IN
FASTENER LENGTH0.875 INCHES NOMINAL IN
THREAD LENGTH0.812 INCHES MINIMUM IN
HARDNESS RATING38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL
NOMINAL THREAD DIAMETER0.164 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
INTERNAL DRIVE STYLEHEXAGON
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
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 1539591?
1539591 is a SCREW,CAP,SOCKET HEAD.
What is the NSN for 1539591?
1539591 is cataloged in the U.S. Government catalog under NSN 5305-00-916-6986. 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.