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2151200108 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2151200108: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OR COPPER ALLOY 425 OVERALL, hole_diameter: 0.115 INCHES MINIMUM AND 0.123 INCHES MAXIMUM IN, hardness_rating: 89.0 ROCKWELL B MINIMUM AND 94.0 ROCKWELL B MAXIMUM, outside_diameter: 0.245 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, style_designator: FLAT EXTERNAL TEETH, material_thickness: 0.015 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-939-1063, 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
2151200108
NSN: 5310-00-939-1063
FSC: 5310 — Nuts and Washers
CAGE: 57057 — NAVCOM DEFENSE ELECTRONICS, INC. (USA)
SPECIFICATIONS
materialCOPPER ALLOY OR COPPER ALLOY 425 OVERALL
hole_diameter0.115 INCHES MINIMUM AND 0.123 INCHES MAXIMUM IN
hardness_rating89.0 ROCKWELL B MINIMUM AND 94.0 ROCKWELL B MAXIMUM
outside_diameter0.245 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
style_designatorFLAT EXTERNAL TEETH
material_thickness0.015 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN
nondefinitive_spec/std_data2 TYPE AND 1 STYLE AND A GRADE AND 3 OR 4 COMPOSITION
material_document_and_classificationQQ-B-750,COMP A FED SPEC 1ST MATERIAL RESPONSE OR CDA ASSN STD 2ND MATERIAL RESPONSE OVERALL
NSN5310-00-939-1063
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2151200108 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
HARDNESS RATING: 89.0 ROCKWELL B MINIMUM AND 94.0 ROCKWELL B MAXIMUM
•
STYLE DESIGNATOR: FLAT EXTERNAL TEETH
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-750,COMP A FED SPEC 1ST MATERIAL RESPONSE OR CDA ASSN STD 2ND MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.245 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.015 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN
•
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 1 STYLE AND A GRADE AND 3 OR 4 COMPOSITION
•
MATERIAL: COPPER ALLOY OR COPPER ALLOY 425 OVERALL
•
HOLE DIAMETER: 0.115 INCHES MINIMUM AND 0.123 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HARDNESS RATING89.0 ROCKWELL B MINIMUM AND 94.0 ROCKWELL B MAXIMUM
STYLE DESIGNATORFLAT EXTERNAL TEETH
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-750,COMP A FED SPEC 1ST MATERIAL RESPONSE OR CDA ASSN STD 2ND MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.245 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
MATERIAL THICKNESS0.015 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 1 STYLE AND A GRADE AND 3 OR 4 COMPOSITION
MATERIALCOPPER ALLOY OR COPPER ALLOY 425 OVERALL
HOLE DIAMETER0.115 INCHES MINIMUM AND 0.123 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 6
300-2126Reference document
Same NSN cross-reference
Reference document — Informative reference only
AN936B4BReference document
Same NSN cross-reference
Reference document — Secondary reference
MS35335-85Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MS35335-71Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
373-7010-000Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
5310009391063Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2151200108?
2151200108 is a WASHER,LOCK.
What parts can replace 2151200108?
There are 6 known substitutes for 2151200108: 300-2126, AN936B4B, MS35335-85 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2151200108?
2151200108 is cataloged in the U.S. Government catalog under NSN 5310-00-939-1063. This indicates validated use in U.S. government and defense supply chains.
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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.