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MILN21337 — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

MILN21337: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, nut_style: ROUND, nut_diameter: 1.032 INCHES MINIMUM AND 1.052 INCHES MAXIMUM IN, thread_class: 3B, nut_thickness: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN, thread_series: UNEF. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-150-3959, 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
MILN21337
NSN: 5310-00-150-3959
NIINs: 001503959, 001503960, 001770742, 001777624, 001856336, 001856337, 001856338, 001856339, 001856340, 001856341, 001856342, 001856343, 001856344, 001856345, 001856346, 001856350, 001856351, 001856352, 001856353, 001856354, 001856355, 001856375, 001856377, 001856390, 001856394, 001856397, 001856457, 004093608, 004805663, 007575909, 011474910, 011524228, 014242382, 014243580
FSC: 5310 — Nuts and Washers
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 4140 OVERALL
nut_styleROUND
nut_diameter1.032 INCHES MINIMUM AND 1.052 INCHES MAXIMUM IN
thread_class3B
nut_thickness0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
thread_seriesUNEF
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
countersink_angle90.0 DEGREES MINIMUM AND 120.0 DEGREES MAXIMUM BOTH ENDS
drive_point_depth0.062 INCHES NOMINAL IN
drive_point_width0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
surface_treatmentPHOSPHATE OVERALL
NSN5310-00-150-3959
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MILN21337 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNS
•
HARDNESS RATING: 90.0 ROCKWELL B MAXIMUM
•
THREAD PITCH DIAMETERS: +1.7309 TO 1.7354 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
DRIVE POINT WIDTH: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.767 INCHES IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNS
HARDNESS RATING90.0 ROCKWELL B MAXIMUM
THREAD PITCH DIAMETERS+1.7309 TO 1.7354 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
DRIVE POINT WIDTH0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.767 INCHES IN
NUT DIAMETER2.516 INCHES MINIMUM AND 2.536 INCHES MAXIMUM IN
DRIVE POINT DEPTH0.094 INCHES NOMINAL IN
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
MS19068-093Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MILN21337?
MILN21337 is a NUT,PLAIN,ROUND.
What parts can replace MILN21337?
There is 1 known substitute for MILN21337: MS19068-093. Substitute compatibility should be verified for your specific system.
What is the NSN for MILN21337?
MILN21337 is cataloged in the U.S. Government catalog under NSN 5310-00-150-3959. 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.