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Technical Data Sheet
4322621 ✓ 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 TOGGLE ARM,DOG ASSEMBLY,HATCH is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, nut_style: HEXAGON, thickness: 0.109 INCHES NOMINAL IN, body_style: WEBBED, SOLID, bore_style: W/ KEYWAY BOTH ENDS, nut_height: 0.724 INCHES MINIMUM AND 0.776 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-251-0088, 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
4322621
NSN: 5310-00-251-0088
FSC: 5310
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleHEXAGON
thickness0.109 INCHES NOMINAL IN
body_styleWEBBED, SOLID
bore_styleW/ KEYWAY BOTH ENDS
nut_height0.724 INCHES MINIMUM AND 0.776 INCHES MAXIMUM IN
tooth_formSTANDARD
bore_length3.3125 INCHES NOMINAL IN
thread_class2B
bore_diameter2.500 INCHES NOMINAL IN
hole_diameter1.031 INCHES NOMINAL IN
overall_width2.5000 INCHES NOMINAL IN
NSN5310-00-251-0088
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4322621 · 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
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
BEARING SURFACE TYPE: CHAMFERED
NOMINAL THREAD SIZE: 0.375 INCHES IN
THREAD QUANTITY PER INCH: 16
MATERIAL DOCUMENT AND CLASSIFICATION: SAE,GR 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL: STEEL OVERALL
NUT STYLE: HEXAGON
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
BEARING SURFACE TYPECHAMFERED
NOMINAL THREAD SIZE0.375 INCHES IN
THREAD QUANTITY PER INCH16
MATERIAL DOCUMENT AND CLASSIFICATIONSAE,GR 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
NUT STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.320 INCHES MINIMUM AND 0.337 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
1377AInterchangeable
interchangeable cross-reference
interchangeable
45-1377AST1SA1-14Interchangeable
interchangeable cross-reference
interchangeable
45-1377AS02BXT1SA0-100Interchangeable
interchangeable cross-reference
interchangeable
1377A0-100PSIGInterchangeable
interchangeable cross-reference
interchangeable
1403Interchangeable
interchangeable cross-reference
interchangeable
45-1082AS-XEY-02B-200Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4322621?
4322621 is a TOGGLE ARM,DOG ASSEMBLY,HATCH.
What parts can replace 4322621?
There are 30 known substitutes for 4322621: 1377A, 45-1377AST1SA1-14, 45-1377AS02BXT1SA0-100 and 27 more. Substitute compatibility should be verified for your specific system.
Is 4322621 still available?
4322621 is currently cancelled.
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