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3001A81 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

3001A81: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 321 OVERALL, recess_depth: 0.167 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN, hole_diameter: 1.400 INCHES MINIMUM AND 1.420 INCHES MAXIMUM IN, overall_height: 0.210 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN, outside_diameter: 1.940 INCHES MINIMUM AND 1.960 INCHES MAXIMUM IN, special_features: TWO INTERNAL PREBENT KEYS 180 DEG APART 0.145 IN. LG IN.

This part is cataloged in the U.S. Government catalog under NSN 5310-00-760-7075, 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
3001A81
NSN: 5310-00-760-7075
FSC: 5310 — Nuts and Washers
CAGE: 00198 — PRATT & WHITNEY CANADA CORP DIV PRATT & WHITNEY CANADA CORP. (CAN)
SPECIFICATIONS
materialSTEEL COMP 321 OVERALL
recess_depth0.167 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
hole_diameter1.400 INCHES MINIMUM AND 1.420 INCHES MAXIMUM IN
overall_height0.210 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
outside_diameter1.940 INCHES MINIMUM AND 1.960 INCHES MAXIMUM IN
special_featuresTWO INTERNAL PREBENT KEYS 180 DEG APART 0.145 IN. LG IN
style_designatorRECESSED
material_thickness0.038 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN
material_document_and_classificationAMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-760-7075
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3001A81 · 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
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.940 INCHES MINIMUM AND 1.960 INCHES MAXIMUM IN
•
RECESS DEPTH: 0.167 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.038 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 321 OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.210 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.940 INCHES MINIMUM AND 1.960 INCHES MAXIMUM IN
RECESS DEPTH0.167 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
MATERIAL THICKNESS0.038 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN
SPECIAL FEATURESTWO INTERNAL PREBENT KEYS 180 DEG APART 0.145 IN. LG IN
MATERIALSTEEL COMP 321 OVERALL
HOLE DIAMETER1.400 INCHES MINIMUM AND 1.420 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
3001481Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 3001A81?
3001A81 is a WASHER,RECESSED.
What parts can replace 3001A81?
There is 1 known substitute for 3001A81: 3001481. Substitute compatibility should be verified for your specific system.
What is the NSN for 3001A81?
3001A81 is cataloged in the U.S. Government catalog under NSN 5310-00-760-7075. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
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.