PartsTable
Technical Data Sheet
Download PDF

R300C4 — NUT,SELF-LOCKING,PLATE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

R300C4: NUT,SELF-LOCKING,PLATE.

The NUT,SELF-LOCKING,PLATE is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, nut_style: PLATE, nut_height: 0.281 INCHES MAXIMUM IN, nut_length: 0.591 INCHES MAXIMUM IN, plate_width: 0.380 INCHES MINIMUM AND 0.414 INCHES MAXIMUM IN, temp_rating: 800.0 FAHRENHEIT NOMINAL DEGF. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-006-3908, 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
R300C4
NSN: 5310-01-006-3908
FSC: 5310 — Nuts and Washers
CAGE: 52828 — REPUBLIC FASTENER MFG. CORP. DBA ARCONIC FASTENING SYSTEMS (USA)
SPECIFICATIONS
materialIRON ALLOY 660 OVERALL
nut_stylePLATE
nut_height0.281 INCHES MAXIMUM IN
nut_length0.591 INCHES MAXIMUM IN
plate_width0.380 INCHES MINIMUM AND 0.414 INCHES MAXIMUM IN
temp_rating800.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNF
hardness_rating49.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN
plate_thickness0.055 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
NSN5310-01-006-3908
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: R300C4 · 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
•
PLATE THICKNESS: 0.055 INCHES MAXIMUM IN
•
NUT LENGTH: 0.591 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNF
•
PRECIOUS MATERIAL: SILVER
•
PLATE WIDTH: 0.380 INCHES MINIMUM AND 0.414 INCHES MAXIMUM IN
•
TEMP RATING: 800.0 FAHRENHEIT NOMINAL DEGF
•
MOUNTING HOLE ARRANGEMENT STYLE: 2 HOLES
TECHNICAL CHARACTERISTICS
PLATE THICKNESS0.055 INCHES MAXIMUM IN
NUT LENGTH0.591 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNF
PRECIOUS MATERIALSILVER
PLATE WIDTH0.380 INCHES MINIMUM AND 0.414 INCHES MAXIMUM IN
TEMP RATING800.0 FAHRENHEIT NOMINAL DEGF
MOUNTING HOLE ARRANGEMENT STYLE2 HOLES
HARDNESS RATING49.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5525 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5737 ASSN STD 2ND MATERIAL RESPONSE 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 6
MA 12740-048Reference document
Same NSN cross-reference
Reference document — Secondary reference
MT13C428Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MK4031-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS21087-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
M12740-048Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
717850-39Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
Ready to buy R300C4?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is R300C4?
R300C4 is a NUT,SELF-LOCKING,PLATE.
What parts can replace R300C4?
There are 6 known substitutes for R300C4: MA 12740-048, MT13C428, MK4031-4 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R300C4?
R300C4 is cataloged in the U.S. Government catalog under NSN 5310-01-006-3908. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — R300C4

✓ 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.