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731443-4 — NUT,PLAIN,KNURLED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

731443-4: NUT,PLAIN,KNURLED.

The NUT,PLAIN,KNURLED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1144 OVERALL, nut_style: KNURLED, nut_diameter: 1.875 INCHES NOMINAL IN, nut_thickness: 1.000 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, surface_treatment: PHOSPHATE MANGANESE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-613-3920, 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
731443-4
NSN: 5310-01-613-3920
FSC: 5310 — Nuts and Washers
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL COMP 1144 OVERALL
nut_styleKNURLED
nut_diameter1.875 INCHES NOMINAL IN
nut_thickness1.000 INCHES NOMINAL IN
special_features2 THRU HOLES 5/16 IN. DIA, 90 DEG APART;MEDIUM KNURL ON EXTERNAL SURFACE; CENTER HOLE 1 IN.- 14 N.F. - 3 THRU; BRINELL HARDNESS 240-311 IN
thread_directionRIGHT-HAND
surface_treatmentPHOSPHATE MANGANESE OVERALL
part_name_assigned_by_controlling_agencyNUT, ADJUSTING
NSN5310-01-613-3920
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 731443-4 · 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 DIRECTION: RIGHT-HAND
•
NUT DIAMETER: 1.875 INCHES NOMINAL IN
•
NUT THICKNESS: 1.000 INCHES NOMINAL IN
•
SURFACE TREATMENT: PHOSPHATE MANGANESE OVERALL
•
NUT STYLE: KNURLED
•
MATERIAL: STEEL COMP 1144 OVERALL
TECHNICAL CHARACTERISTICS
THREAD DIRECTIONRIGHT-HAND
NUT DIAMETER1.875 INCHES NOMINAL IN
NUT THICKNESS1.000 INCHES NOMINAL IN
SPECIAL FEATURES2 THRU HOLES 5/16 IN. DIA, 90 DEG APART;MEDIUM KNURL ON EXTERNAL SURFACE; CENTER HOLE 1 IN.- 14 N.F. - 3 THRU; BRINELL HARDNESS 240-311 IN
SURFACE TREATMENTPHOSPHATE MANGANESE OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYNUT, ADJUSTING
NUT STYLEKNURLED
MATERIALSTEEL COMP 1144 OVERALL
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 731443-4?
731443-4 is a NUT,PLAIN,KNURLED.
What is the NSN for 731443-4?
731443-4 is cataloged in the U.S. Government catalog under NSN 5310-01-613-3920. 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.