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75A325991-2001 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

75A325991-2001: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 7075 OVERALL, hole_diameter: 0.188 INCHES NOMINAL IN, surface_treatment: PRIMER AND CHROMATE OVERALL, width_across_flats: 0.50 INCHES NOMINAL IN, peripheral_shape_style: SQUARE, center_hole_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-618-6341, 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
75A325991-2001
NSN: 5310-01-618-6341
FSC: 5310 — Nuts and Washers
CAGE: U9143 — BAE SYSTEMS (OPERATIONS) LIMITED (GBR)
SPECIFICATIONS
materialALUMINUM ALLOY 7075 OVERALL
hole_diameter0.188 INCHES NOMINAL IN
special_featuresWASHER IS TAPERED FROM .04INCHES THICK AT THE TOP TO .064INCHES THICK AT THE BOTTOM;PROFILE SHAPE IS A TAPERED RECTANGLE IN
surface_treatmentPRIMER AND CHROMATE OVERALL
width_across_flats0.50 INCHES NOMINAL IN
peripheral_shape_styleSQUARE
center_hole_shape_styleROUND
end_item_identificationRADAR PROCESS
material_document_and_classificationQQ-A-250/12 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyWASHER,PROFILED;WASHER FRAME 29
surface_treatment_document_and_classificationMIL-PRF-23377,TY I,CL C2 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-C-5541,CL 3 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
NSN5310-01-618-6341
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 75A325991-2001 · 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
•
WIDTH ACROSS FLATS: 0.50 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-PRF-23377,TY I,CL C2 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-C-5541,CL 3 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/12 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: PRIMER AND CHROMATE OVERALL
•
PERIPHERAL SHAPE STYLE: SQUARE
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.50 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-PRF-23377,TY I,CL C2 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-C-5541,CL 3 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/12 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SPECIAL FEATURESWASHER IS TAPERED FROM .04INCHES THICK AT THE TOP TO .064INCHES THICK AT THE BOTTOM;PROFILE SHAPE IS A TAPERED RECTANGLE IN
SURFACE TREATMENTPRIMER AND CHROMATE OVERALL
PERIPHERAL SHAPE STYLESQUARE
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER,PROFILED;WASHER FRAME 29
END ITEM IDENTIFICATIONRADAR PROCESS
MATERIALALUMINUM ALLOY 7075 OVERALL
CENTER HOLE SHAPE STYLEROUND
SUBSTITUTES & CROSS-REFERENCES 1
03311M1320Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 75A325991-2001?
75A325991-2001 is a WASHER,FLAT.
What parts can replace 75A325991-2001?
There is 1 known substitute for 75A325991-2001: 03311M1320. Substitute compatibility should be verified for your specific system.
What is the NSN for 75A325991-2001?
75A325991-2001 is cataloged in the U.S. Government catalog under NSN 5310-01-618-6341. 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.