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299-4567-138A — NUT,PLAIN,SPLINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

299-4567-138A: NUT,PLAIN,SPLINE.

The NUT,PLAIN,SPLINE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OR STEEL COMP 416 OVERALL, nut_style: SPLINE, nut_height: 0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN, nut_diameter: 0.430 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN, pilot_length: 0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN, thread_class: 2B. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-299-2469, 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
299-4567-138A
NSN: 5310-01-299-2469
FSC: 5310 — Nuts and Washers
CAGE: 19710 — MPC PRODUCTS CORPORATION DBA WOODWARD MPC, INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OR STEEL COMP 416 OVERALL
nut_styleSPLINE
nut_height0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
nut_diameter0.430 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN
pilot_length0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
pilot_diameter0.350 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
hardness_rating24.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
special_featuresNUT HAS EIGHT SLOTS EQUALLY SPACED AND WITHOUT GROOVE IN SIDE
thread_directionRIGHT-HAND
nominal_thread_size0.250 INCHES IN
NSN5310-01-299-2469
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 299-4567-138A · 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: EI 999-5902-003C MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNF
•
HARDNESS RATING: 24.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A581 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A582,TY416SFTT2AADPSA000 ASSN STD 2ND MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
NUT DIAMETER: 0.430 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN
•
PILOT DIAMETER: 0.350 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONEI 999-5902-003C MFR REF SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNF
HARDNESS RATING24.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A581 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A582,TY416SFTT2AADPSA000 ASSN STD 2ND MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
NUT DIAMETER0.430 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN
PILOT DIAMETER0.350 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
PILOT LENGTH0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
NUT HEIGHT0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 299-4567-138A?
299-4567-138A is a NUT,PLAIN,SPLINE.
What is the NSN for 299-4567-138A?
299-4567-138A is cataloged in the U.S. Government catalog under NSN 5310-01-299-2469. 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.