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3M1277E4D14A — SCREW,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3M1277E4D14A: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, head_style: FLAT COUNTERSUNK UNDERCUT, grip_length: 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN, head_height: 0.057 INCHES NOMINAL IN, thread_class: 3A A, grip_diameter: 0.2646 INCHES MINIMUM AND 0.2651 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-604-2872, 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
3M1277E4D14A
NSN: 5305-01-604-2872
FSC: 5305 — Screws
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
head_styleFLAT COUNTERSUNK UNDERCUT
grip_length0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN
head_height0.057 INCHES NOMINAL IN
thread_class3A A
grip_diameter0.2646 INCHES MINIMUM AND 0.2651 INCHES MAXIMUM IN
head_diameter0.3859 INCHES MINIMUM AND 0.3948 INCHES MAXIMUM IN
thread_length0.41 INCHES MINIMUM AND 0.44 INCHES MAXIMUM IN
fastener_length1.285 INCHES MINIMUM AND 1.315 INCHES MAXIMUM IN
special_featuresPASSIVATE PLUS CETYL ALCOHOL PER MIL-L-87132,TYPE 1,GRADE B.SEE TECH DATA FOR ALL INFO ABOUT FINISH AND ANY OTHER ADDITIONAL DETAILS
thread_directionRIGHT-HAND
countersink_angle99.00 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
NSN5305-01-604-2872
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3M1277E4D14A · 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 INSIDE DIAMETER: 0.358 INCHES MINIMUM AND 0.365 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.057 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.285 INCHES MINIMUM AND 1.315 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-L-87132 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.41 INCHES MINIMUM AND 0.44 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS5662 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SPLINE MAJOR DIAMETER: 0.1100 INCHES MINIMUM AND 0.1120 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS
HEAD INSIDE DIAMETER0.358 INCHES MINIMUM AND 0.365 INCHES MAXIMUM IN
HEAD HEIGHT0.057 INCHES NOMINAL IN
FASTENER LENGTH1.285 INCHES MINIMUM AND 1.315 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-L-87132 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.41 INCHES MINIMUM AND 0.44 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5662 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL
SPLINE MAJOR DIAMETER0.1100 INCHES MINIMUM AND 0.1120 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
FEATURES PROVIDEDCETYL ALCOHOL LUBRICANT
HEAD STYLEFLAT COUNTERSUNK UNDERCUT
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES 1
TX1027E4D14XASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 3M1277E4D14A?
3M1277E4D14A is a SCREW,CLOSE TOLERANCE.
What parts can replace 3M1277E4D14A?
There is 1 known substitute for 3M1277E4D14A: TX1027E4D14XA. Substitute compatibility should be verified for your specific system.
What is the NSN for 3M1277E4D14A?
3M1277E4D14A is cataloged in the U.S. Government catalog under NSN 5305-01-604-2872. 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.