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Technical Data Sheet
PartsTable / COMPONENT / 2122700-72
2122700-72 ✓ 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 PIN,GROOVED,HEADLESS is a the manufacturer industrial component. Key specifications include diameter: 0.3751 INCHES MINIMUM AND 0.3753 INCHES MAXIMUM IN, material: STEEL COMP 4140 OVERALL, overall_length: 0.875 INCHES NOMINAL IN, surface_finish: 32.0 MICROINCHES OUTSIDE DIAMETER, undercut_width: 0.053 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN, first_end_style: SQUARE W/THRU HOLE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-923-5429, 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
2122700-72
NSN: 5315-00-923-5429
FSC: 5315
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
diameter0.3751 INCHES MINIMUM AND 0.3753 INCHES MAXIMUM IN
materialSTEEL COMP 4140 OVERALL
overall_length0.875 INCHES NOMINAL IN
surface_finish32.0 MICROINCHES OUTSIDE DIAMETER
undercut_width0.053 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
first_end_styleSQUARE W/THRU HOLE
hardness_rating32.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL
effective_length0.688 INCHES NOMINAL IN
second_end_styleSQUARE INTERNALLY THREADED
special_features0.167 IN. MIN. 0.174 IN. MAX. DIAMETER LONGITUDINAL HOLE; GROOVE END 8-32 UNC-2B,0.345 IN. MIN. 0.405 IN. MAX. LENGTH IN
style_designatorGROOVE
surface_treatmentPHOSPHATE MANGANESE OVERALL
NSN5315-00-923-5429
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2122700-72 · 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
•
SECOND END RELATIONSHIP WITH FIRST END: NOT IDENTICAL
•
UNDERCUT WIDTH: 0.053 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 4140 OVERALL
•
SURFACE TREATMENT: PHOSPHATE MANGANESE OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: DOD-P-16232 TY M,CL 1 NATIONAL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
HARDNESS RATING: 32.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
SECOND END RELATIONSHIP WITH FIRST ENDNOT IDENTICAL
UNDERCUT WIDTH0.053 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
MATERIALSTEEL COMP 4140 OVERALL
SURFACE TREATMENTPHOSPHATE MANGANESE OVERALL
SPECIAL FEATURES0.167 IN. MIN. 0.174 IN. MAX. DIAMETER LONGITUDINAL HOLE; GROOVE END 8-32 UNC-2B,0.345 IN. MIN. 0.405 IN. MAX. LENGTH IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONDOD-P-16232 TY M,CL 1 NATIONAL SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL
SURFACE FINISH32.0 MICROINCHES OUTSIDE DIAMETER
FIRST END LOCATIONOPPOSITE GROOVED END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
2470236G3Interchangeable
interchangeable cross-reference
interchangeable
8156B0440-3Interchangeable
interchangeable cross-reference
interchangeable
2372Interchangeable
interchangeable cross-reference
interchangeable
DISC FORM 650Interchangeable
interchangeable cross-reference
interchangeable
00648-4Interchangeable
interchangeable cross-reference
interchangeable
2935-07Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2122700-72?
2122700-72 is a PIN,GROOVED,HEADLESS.
What parts can replace 2122700-72?
There are 13 known substitutes for 2122700-72: 2470236G3, 8156B0440-3, 2372 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2122700-72?
2122700-72 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-923-5429. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026