PartsTable
Technical Data Sheet
ASME B18.21.1 ✓ 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 ASME B18.21.1 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-184-9161, 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
ASME B18.21.1
NSN: 5310-00-184-9161
FSC: 5310
CAGE: 81346 — AMERICAN SOCIETY FOR TESTING AND MATERIALS DBA ASTM INTERNATIONAL (USA)
SPECIFICATIONS
Part NumberASME B18.21.1
NSN5310-00-184-9161
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: ASME B18.21.1 · 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
MATERIAL THICKNESS: 0.042 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
STYLE DESIGNATOR: FLAT INTERNAL TEETH
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35,TY 2 OR TY 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NONDEFINITIVE SPEC/STD DATA: 2 COMPOSITION AND A GRADE AND 1 STYLE AND 1 TYPE
OUTSIDE DIAMETER: 1.045 INCHES MINIMUM AND 1.071 INCHES MAXIMUM IN
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
HOLE DIAMETER: 0.640 INCHES MINIMUM AND 0.663 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL THICKNESS0.042 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
STYLE DESIGNATORFLAT INTERNAL TEETH
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35,TY 2 OR TY 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NONDEFINITIVE SPEC/STD DATA2 COMPOSITION AND A GRADE AND 1 STYLE AND 1 TYPE
OUTSIDE DIAMETER1.045 INCHES MINIMUM AND 1.071 INCHES MAXIMUM IN
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
HOLE DIAMETER0.640 INCHES MINIMUM AND 0.663 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL COMP 410 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
5310PL0716587Interchangeable
Same NIIN cross-reference
interchangeable
10116653Interchangeable
Same NIIN cross-reference
interchangeable
MS35333-80Interchangeable
Same NIIN cross-reference
interchangeable
FF-W-100Interchangeable
Same NIIN cross-reference
interchangeable
1728-00-00Interchangeable
Same NIIN cross-reference
interchangeable
0740793Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ASME B18.21.1?
ASME B18.21.1 is a ASME B18.21.1.
What parts can replace ASME B18.21.1?
There are 9 known substitutes for ASME B18.21.1: 5310PL0716587, 10116653, MS35333-80 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ASME B18.21.1?
ASME B18.21.1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-184-9161. This indicates validated use in U.S. government and defense supply chains.
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