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4001874 — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4001874: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8740 OVERALL, nut_style: ROUND, nut_diameter: 2.840 INCHES MINIMUM AND 2.850 INCHES MAXIMUM IN, thread_class: 3B, nut_thickness: 0.295 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN, thread_series: UNIFIED NATIONAL JOINT (UNJ). This part is cataloged in the U.S.

Government catalog under NSN 5310-00-373-3296, 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
4001874
NSN: 5310-00-373-3296
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OVERALL
nut_styleROUND
nut_diameter2.840 INCHES MINIMUM AND 2.850 INCHES MAXIMUM IN
thread_class3B
nut_thickness0.295 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN
thread_seriesUNIFIED NATIONAL JOINT (UNJ)
hardness_rating30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
drive_point_depth0.080 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
drive_point_width0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
nominal_thread_size2.250 INCHES IN
drive_point_quantity20
NSN5310-00-373-3296
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4001874 · 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 JOINT (UNJ)
•
HARDNESS RATING: 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
DRIVE POINT WIDTH: 0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 2.250 INCHES IN
•
NUT DIAMETER: 2.840 INCHES MINIMUM AND 2.850 INCHES MAXIMUM IN
•
DRIVE POINT DEPTH: 0.080 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
THREAD SERIESUNIFIED NATIONAL JOINT (UNJ)
HARDNESS RATING30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
DRIVE POINT WIDTH0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE2.250 INCHES IN
NUT DIAMETER2.840 INCHES MINIMUM AND 2.850 INCHES MAXIMUM IN
DRIVE POINT DEPTH0.080 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN
NUT THICKNESS0.295 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN
DRIVE POINT QUANTITY20
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
5310PL0723159Reference 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 4001874?
4001874 is a NUT,PLAIN,ROUND.
What parts can replace 4001874?
There is 1 known substitute for 4001874: 5310PL0723159. Substitute compatibility should be verified for your specific system.
What is the NSN for 4001874?
4001874 is cataloged in the U.S. Government catalog under NSN 5310-00-373-3296. 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.