3M1278E3D8A — SCREW,SHOULDER

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

3M1278E3D8A: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 718 OVERALL, hole_type: DRILLED, head_style: FLAT COUNTERSUNK, thread_class: 3A A, head_diameter: 0.294 INCHES MINIMUM AND 0.301 INCHES MAXIMUM IN, hole_diameter: 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-536-4452, 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

3M1278E3D8A

NSN: 5305-01-536-4452
FSC: 5305 — Screws
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)

SPECIFICATIONS

material	NICKEL ALLOY 718 OVERALL
hole_type	DRILLED
head_style	FLAT COUNTERSUNK
thread_class	3A A
head_diameter	0.294 INCHES MINIMUM AND 0.301 INCHES MAXIMUM IN
hole_diameter	0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
hole_quantity	1
thread_length	0.425 INCHES NOMINAL IN
shoulder_shape	ROUND GRIP
fastener_length	0.830 INCHES MINIMUM AND 0.860 INCHES MAXIMUM IN
shoulder_length	0.454 INCHES NOMINAL GRIP IN
thread_direction	RIGHT-HAND
NSN	5305-01-536-4452

COMPONENT DIAGRAM

KEY FEATURES

•

SPLINE MINOR DIAMETER: 0.1105 INCHES MINIMUM AND 0.1125 INCHES MAXIMUM IN

•

FASTENER LENGTH: 0.830 INCHES MINIMUM AND 0.860 INCHES MAXIMUM IN

•

SHOULDER LENGTH: 0.454 INCHES NOMINAL GRIP IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-L-87132 TYPE1 GRADE B MIL SPEC SINGLE TREATMENT RESPONSE OVERALL

•

SHOULDER DIAMETER: 0.2177 INCHES MINIMUM AND 0.2182 INCHES MAXIMUM GRIP IN

•

THREAD LENGTH: 0.425 INCHES NOMINAL IN

•

SHOULDER SHAPE: ROUND GRIP

•

CRITICALITY CODE JUSTIFICATION: AGAV

TECHNICAL CHARACTERISTICS

SPLINE MINOR DIAMETER	0.1105 INCHES MINIMUM AND 0.1125 INCHES MAXIMUM IN
FASTENER LENGTH	0.830 INCHES MINIMUM AND 0.860 INCHES MAXIMUM IN
SHOULDER LENGTH	0.454 INCHES NOMINAL GRIP IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-L-87132 TYPE1 GRADE B MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER	0.2177 INCHES MINIMUM AND 0.2182 INCHES MAXIMUM GRIP IN
THREAD LENGTH	0.425 INCHES NOMINAL IN
SHOULDER SHAPE	ROUND GRIP
CRITICALITY CODE JUSTIFICATION	AGAV
MATERIAL DOCUMENT AND CLASSIFICATION	AMS5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SPLINE MAJOR DIAMETER	0.1540 INCHES MINIMUM AND 0.1560 INCHES MAXIMUM IN

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 2

TX1027E3D8YASame NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

11863E3D8ASame 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 3M1278E3D8A?

3M1278E3D8A is a SCREW,SHOULDER.

What parts can replace 3M1278E3D8A?

There are 2 known substitutes for 3M1278E3D8A: TX1027E3D8YA, 11863E3D8A. Substitute compatibility should be verified for your specific system.

What is the NSN for 3M1278E3D8A?

3M1278E3D8A is cataloged in the U.S. Government catalog under NSN 5305-01-536-4452. This indicates validated use in U.S. government and defense supply chains.

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