PartsTable
Technical Data Sheet
D12420-5 ✓ Verified by PartsTable
· NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.074 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN, hole_diameter: 0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM IN, overall_diameter: 1.055 INCHES MINIMUM AND 1.092 INCHES MAXIMUM IN, surface_treatment: CADMIUM AND CHROMATE OVERALL, peripheral_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-809-5998, 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
D12420-5
NSN: 5310-00-809-5998
FSC: 5310
CAGE: 91340 — MET-PRO CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.074 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN
hole_diameter0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM IN
overall_diameter1.055 INCHES MINIMUM AND 1.092 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
nondefinitive_spec/std_dataA TYPE AND 1 GRADE AND A CLASS
departure_from_cited_documentAS MODIFIED BY THE FINISH
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-809-5998
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: D12420-5 · 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
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
MATERIAL: STEEL OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NONDEFINITIVE SPEC/STD DATA: A TYPE AND 1 GRADE AND A CLASS
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
DEPARTURE FROM CITED DOCUMENT: AS MODIFIED BY THE FINISH
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIALSTEEL OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NONDEFINITIVE SPEC/STD DATAA TYPE AND 1 GRADE AND A CLASS
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
DEPARTURE FROM CITED DOCUMENTAS MODIFIED BY THE FINISH
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
END ITEM IDENTIFICATIONW/S: AIRCRAFT, AWACS, E-3A; SHIPBOARD MATERIAL HANDLING EQUIPMENT (MHE); TRAINER, B-1B AIRCRAFT; FIRE PUMPS; VEHICLE, AIRCRAFT REFUELER 4-14; STREAM (STD. TENSIONED REPLENISHMENT AT SEA METHOD); ELEVATORS, AIRCRAFT; AIRBORNE MOBILE DIR AIR SPT CTL (2ID),(; MEDIUM MINE PROTECTED VEHICLE - AMPV; ARMORED MULTI-PURPOSE VEHICLE (AMPV); MRAP BUFFALO MK2A2; MULTIPLE LAUNCH ROCKET SYSTEM (MLRS); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE; HIGH-MOBILITY ARTILLERY ROCKET SYSTEM (HIMARS); LOGISTICS SUPPORT VESSEL A
HOLE DIAMETER0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM IN
PERIPHERAL SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
303775Interchangeable
interchangeable cross-reference
interchangeable
93605-106Interchangeable
interchangeable cross-reference
interchangeable
5133-18Interchangeable
interchangeable cross-reference
interchangeable
MIL-PRF-19500/118Interchangeable
interchangeable cross-reference
interchangeable
JAN1N483BInterchangeable
interchangeable cross-reference
interchangeable
25716295Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D12420-5?
D12420-5 is a WASHER,FLAT.
What parts can replace D12420-5?
There are 25 known substitutes for D12420-5: 303775, 93605-106, 5133-18 and 22 more. Substitute compatibility should be verified for your specific system.
Is D12420-5 still available?
D12420-5 is currently cancelled.
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