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74A731220-2001 — NUT,SLEEVE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

74A731220-2001: NUT,SLEEVE.

The NUT,SLEEVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 630 OVERALL, nut_style: SLEEVE, nut_length: 0.783 INCHES MINIMUM AND 0.793 INCHES MAXIMUM IN, nut_diameter: 0.634 INCHES MINIMUM AND 0.636 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF). This part is cataloged in the U.S.

Government catalog under NSN 5310-01-204-6855, 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
74A731220-2001
NSN: 5310-01-204-6855
FSC: 5310 — Nuts and Washers
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL COMP 630 OVERALL
nut_styleSLEEVE
nut_length0.783 INCHES MINIMUM AND 0.793 INCHES MAXIMUM IN
nut_diameter0.634 INCHES MINIMUM AND 0.636 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
flange_diameter0.720 INCHES NOMINAL IN
flange_thickness0.145 INCHES MINIMUM AND 0.155 INCHES MAXIMUM IN
special_featuresGROOVE 0.140 IN. WIDE AND 0.090 IN. DEEP IN SIDE OF NUT; CAVITY 0.490 IN. DIA IN FLANGE END OF NUT IN
thread_directionRIGHT-HAND
countersink_angle88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM BOTH ENDS
surface_treatmentCADMIUM OVERALL EXCEPT THREADS
NSN5310-01-204-6855
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 74A731220-2001 · 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
•
FLANGE DIAMETER: 0.720 INCHES NOMINAL IN
•
NUT LENGTH: 0.783 INCHES MINIMUM AND 0.793 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: PS13101,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL EXCEPT THREADS
•
FLANGE THICKNESS: 0.145 INCHES MINIMUM AND 0.155 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER0.720 INCHES NOMINAL IN
NUT LENGTH0.783 INCHES MINIMUM AND 0.793 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONPS13101,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL EXCEPT THREADS
FLANGE THICKNESS0.145 INCHES MINIMUM AND 0.155 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
NUT DIAMETER0.634 INCHES MINIMUM AND 0.636 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPEROUND BOTH ENDS
SUBSTITUTES & CROSS-REFERENCES 1
10110153Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 74A731220-2001?
74A731220-2001 is a NUT,SLEEVE.
What parts can replace 74A731220-2001?
There is 1 known substitute for 74A731220-2001: 10110153. Substitute compatibility should be verified for your specific system.
What is the NSN for 74A731220-2001?
74A731220-2001 is cataloged in the U.S. Government catalog under NSN 5310-01-204-6855. 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.