B18.21.2M — WASHER,LOCK

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

B18.21.2M: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 12.15 MILLIMETERS MINIMUM AND 12.45 MILLIMETERS MAXIMUM MM, outside_diameter: 21.47 MILLIMETERS MAXIMUM MM, special_features: MATERIAL: ASTM F 436M,TYPE 1-CARBON STEEL;FINISH: ASTM B 633,TYPE II,SC 4, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: ZINC OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-478-5620, 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

B18.21.2M

NSN: 5310-01-478-5620
NIINs: 014785620, 014785622, 014785935, 015278014, 015699599
FSC: 5310 — Nuts and Washers
CAGE: 80204 — AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED DBA AMERICAN NATIONAL STANDARDS INSTITUTE (USA)

SPECIFICATIONS

material	STEEL OVERALL
hole_diameter	12.15 MILLIMETERS MINIMUM AND 12.45 MILLIMETERS MAXIMUM MM
outside_diameter	21.47 MILLIMETERS MAXIMUM MM
special_features	MATERIAL: ASTM F 436M,TYPE 1-CARBON STEEL;FINISH: ASTM B 633,TYPE II,SC 4
style_designator	SPLIT HELICAL-RIGHT HAND
surface_treatment	ZINC OVERALL
material_thickness	3.18 MILLIMETERS MINIMUM MM
end_item_identification	2355-01-539-3639; LIGHT ARMORED VEHICLE
part_name_assigned_by_controlling_agency	M 10 LOCK WASHER ZINC
surface_treatment_document_and_classification	ASTM B 633,FE/ZN,TYPE II ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN	5310-01-478-5620

COMPONENT DIAGRAM

KEY FEATURES

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B 633,FE/ZN,TYPE II ASSN STD SINGLE TREATMENT RESPONSE OVERALL

•

STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND

•

OUTSIDE DIAMETER: 14.96 MILLIMETERS MAXIMUM MM

•

MATERIAL THICKNESS: 1.98 MILLIMETERS MINIMUM MM

•

SURFACE TREATMENT: ZINC OVERALL

•

MATERIAL: STEEL OVERALL

•

HOLE DIAMETER: 8.13 MILLIMETERS MINIMUM AND 8.36 MILLIMETERS MAXIMUM MM

TECHNICAL CHARACTERISTICS

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	ASTM B 633,FE/ZN,TYPE II ASSN STD SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATOR	SPLIT HELICAL-RIGHT HAND
OUTSIDE DIAMETER	14.96 MILLIMETERS MAXIMUM MM
MATERIAL THICKNESS	1.98 MILLIMETERS MINIMUM MM
SURFACE TREATMENT	ZINC OVERALL
END ITEM IDENTIFICATION	6115-01-431-3063;GENERATOR SET,DIESEL ENGINE; MULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
MATERIAL	STEEL OVERALL
HOLE DIAMETER	8.13 MILLIMETERS MINIMUM AND 8.36 MILLIMETERS MAXIMUM MM

SUBSTITUTES & CROSS-REFERENCES 2

B18.24-2004Reference document

Same NSN cross-reference

Reference document — Secondary reference

B18212HRCZ080Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is B18.21.2M?

B18.21.2M is a WASHER,LOCK.

What parts can replace B18.21.2M?

There are 2 known substitutes for B18.21.2M: B18.24-2004, B18212HRCZ080. Substitute compatibility should be verified for your specific system.

What is the NSN for B18.21.2M?

B18.21.2M is cataloged in the U.S. Government catalog under NSN 5310-01-478-5620. This indicates validated use in U.S. government and defense supply chains.

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