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2801285-4 — SCREW,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

2801285-4: SCREW,EXTERNALLY RELIEVED BODY.

The SCREW,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, head_style: FLAT CHAMFERFLAT CHAMFER, head_height: 0.087 INCHES MINIMUM AND 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM0.097 INCHES MAXIMUM IN, thread_class: 2A2A, head_diameter: 0.256 INCHES MINIMUM AND 0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM0.270 INCHES MAXIMUM IN, thread_length: 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-135-1124, 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
2801285-4
NSN: 5305-01-135-1124
FSC: 5305 — Screws
CAGE: 55972 — HONEYWELL INTL INC DEFENSE AVIONICS SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
head_styleFLAT CHAMFERFLAT CHAMFER
head_height0.087 INCHES MINIMUM AND 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM0.097 INCHES MAXIMUM IN
thread_class2A2A
head_diameter0.256 INCHES MINIMUM AND 0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM0.270 INCHES MAXIMUM IN
thread_length0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
fastener_length0.450 INCHES NOMINAL0.450 INCHES NOMINAL IN
thread_directionRIGHT-HANDRIGHT-HAND
askewed_head_angle90.0 DEGREES NOMINAL90.0 DEGREES NOMINAL
internal_drive_styleCROSS RECESS TYPE 1CROSS RECESS TYPE 1
nominal_thread_diameter0.138 INCHES0.138 INCHES IN
first_diameter_from_head0.095 INCHES NOMINAL0.095 INCHES NOMINAL IN
NSN5305-01-135-1124
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 2801285-4 · 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: 0.087 INCHES MINIMUM AND 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM0.097 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.450 INCHES NOMINAL0.450 INCHES NOMINAL IN
•
THREAD LENGTH: 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
•
FIRST DIAMETER FROM HEAD: 0.095 INCHES NOMINAL0.095 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.138 INCHES0.138 INCHES IN
•
HEAD STYLE: FLAT CHAMFERFLAT CHAMFER
•
THREAD DIRECTION: RIGHT-HANDRIGHT-HAND
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER: 0.200 INCHES NOMINAL0.200 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.087 INCHES MINIMUM AND 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM0.097 INCHES MAXIMUM IN
FASTENER LENGTH0.450 INCHES NOMINAL0.450 INCHES NOMINAL IN
THREAD LENGTH0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
FIRST DIAMETER FROM HEAD0.095 INCHES NOMINAL0.095 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.138 INCHES0.138 INCHES IN
HEAD STYLEFLAT CHAMFERFLAT CHAMFER
THREAD DIRECTIONRIGHT-HANDRIGHT-HAND
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.200 INCHES NOMINAL0.200 INCHES NOMINAL IN
ASKEWED HEAD ANGLE90.0 DEGREES NOMINAL90.0 DEGREES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY11
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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2801285-4?
2801285-4 is a SCREW,EXTERNALLY RELIEVED BODY.
What is the NSN for 2801285-4?
2801285-4 is cataloged in the U.S. Government catalog under NSN 5305-01-135-1124. 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.