ST4M178A2 — WASHER,SPRING TENSION

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

ST4M178A2: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 172 OVERALL, hole_diameter: 1.650 INCHES NOMINAL1.650 INCHES NOMINAL IN, overall_height: 0.368 INCHES NOMINAL0.368 INCHES NOMINAL IN, outside_diameter: 2.110 INCHES NOMINAL2.110 INCHES NOMINAL IN, special_features: ONE TAB,0.200 IN. W,ON EACH SIDE OF CENTER HOLEONE TAB,0.200 IN.

W,ON EACH SIDE OF CENTER HOLE IN, style_designator: SPRING TENSION. This part is cataloged in the U.S. Government catalog under NSN 5310-01-030-4918, 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

ST4M178A2

NSN: 5310-01-030-4918
FSC: 5310 — Nuts and Washers
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)

SPECIFICATIONS

material	COPPER ALLOY 172 OVERALL
hole_diameter	1.650 INCHES NOMINAL1.650 INCHES NOMINAL IN
overall_height	0.368 INCHES NOMINAL0.368 INCHES NOMINAL IN
outside_diameter	2.110 INCHES NOMINAL2.110 INCHES NOMINAL IN
special_features	ONE TAB,0.200 IN. W,ON EACH SIDE OF CENTER HOLEONE TAB,0.200 IN. W,ON EACH SIDE OF CENTER HOLE IN
style_designator	SPRING TENSION
surface_treatment	TIN OVERALL
material_thickness	0.016 INCHES NOMINAL0.016 INCHES NOMINAL IN
material_document_and_classification	QQ-C-533,TEMPER AT FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classification	MIL-T-10727 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN	5310-01-030-4918

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-T-10727 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL

•

STYLE DESIGNATOR: SPRING TENSION

•

MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-533,TEMPER AT FED SPEC SINGLE MATERIAL RESPONSE OVERALL

•

OUTSIDE DIAMETER: 2.110 INCHES NOMINAL2.110 INCHES NOMINAL IN

•

MATERIAL THICKNESS: 0.016 INCHES NOMINAL0.016 INCHES NOMINAL IN

•

SURFACE TREATMENT: TIN OVERALL

TECHNICAL CHARACTERISTICS

OVERALL HEIGHT	0.368 INCHES NOMINAL0.368 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-T-10727 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATOR	SPRING TENSION
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-C-533,TEMPER AT FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER	2.110 INCHES NOMINAL2.110 INCHES NOMINAL IN
MATERIAL THICKNESS	0.016 INCHES NOMINAL0.016 INCHES NOMINAL IN
SPECIAL FEATURES	ONE TAB,0.200 IN. W,ON EACH SIDE OF CENTER HOLEONE TAB,0.200 IN. W,ON EACH SIDE OF CENTER HOLE IN
SURFACE TREATMENT	TIN OVERALL
MATERIAL	COPPER ALLOY 172 OVERALL
HOLE DIAMETER	1.650 INCHES NOMINAL1.650 INCHES NOMINAL IN

SUBSTITUTES & CROSS-REFERENCES 1

4M294-28Same 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 ST4M178A2?

ST4M178A2 is a WASHER,SPRING TENSION.

What parts can replace ST4M178A2?

There is 1 known substitute for ST4M178A2: 4M294-28. Substitute compatibility should be verified for your specific system.

What is the NSN for ST4M178A2?

ST4M178A2 is cataloged in the U.S. Government catalog under NSN 5310-01-030-4918. This indicates validated use in U.S. government and defense supply chains.

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ST4M178A2 — WASHER,SPRING TENSION

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