WC1278E4D7A — SCREW,SHOULDER

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

WC1278E4D7A: 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: 0.388 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN, hole_diameter: 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-536-4447, 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

WC1278E4D7A

NSN: 5305-01-536-4447
FSC: 5305 — Screws
CAGE: 60516 — WEST COAST AEROSPACE, INC. (USA)

SPECIFICATIONS

material	NICKEL ALLOY 718 OVERALL
hole_type	DRILLED
head_style	FLAT COUNTERSUNK
thread_class	3A A
head_diameter	0.388 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
hole_diameter	0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN
hole_quantity	1
thread_length	0.425 INCHES NOMINAL IN
shoulder_shape	ROUND GRIP
fastener_length	0.8475 INCHES MINIMUM AND 0.8775 INCHES MAXIMUM IN
shoulder_length	0.3775 INCHES NOMINAL GRIP IN
thread_direction	RIGHT-HAND
NSN	5305-01-536-4447

COMPONENT DIAGRAM

KEY FEATURES

•

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

•

FASTENER LENGTH: 0.8475 INCHES MINIMUM AND 0.8775 INCHES MAXIMUM IN

•

SHOULDER LENGTH: 0.3775 INCHES NOMINAL GRIP IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-L-87132 TYPE 1 GRADE B MIL SPEC SINGLE TREATMENT RESPONSE OVERALL

•

SHOULDER DIAMETER: 0.2802 INCHES MINIMUM AND 0.2807 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	0.8475 INCHES MINIMUM AND 0.8775 INCHES MAXIMUM IN
SHOULDER LENGTH	0.3775 INCHES NOMINAL GRIP IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-L-87132 TYPE 1 GRADE B MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER	0.2802 INCHES MINIMUM AND 0.2807 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.

5305-00-001-5016 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 2

TX1027E4D7YASame NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

3M1278E4D7ASame 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 WC1278E4D7A?

WC1278E4D7A is a SCREW,SHOULDER.

What parts can replace WC1278E4D7A?

There are 2 known substitutes for WC1278E4D7A: TX1027E4D7YA, 3M1278E4D7A. Substitute compatibility should be verified for your specific system.

What is the NSN for WC1278E4D7A?

WC1278E4D7A is cataloged in the U.S. Government catalog under NSN 5305-01-536-4447. This indicates validated use in U.S. government and defense supply chains.

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