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Technical Data Sheet
PartsTable / COMPONENT / TYPE-2,STYLE-4, GRADE-B
TYPE-2,STYLE-4, GRADE-B ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The TYPE-2,STYLE-4, GRADE-B is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-280-6749, 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
TYPE-2,STYLE-4, GRADE-B
NSN: 5310-01-280-6749
FSC: 5310
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
Part NumberTYPE-2,STYLE-4, GRADE-B
NSN5310-01-280-6749
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: TYPE-2,STYLE-4, GRADE-B · 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
•
WIDTH ACROSS FLATS: 0.922 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN
•
THREAD QUANTITY PER INCH: 11
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
•
HARDNESS RATING: 69.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD SIZE: 0.625 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH ACROSS FLATS0.922 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH11
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
HARDNESS RATING69.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD SIZE0.625 INCHES IN
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS2B
NUT STYLEHEXAGON
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
FFN836Interchangeable
interchangeable cross-reference
interchangeable
MS35691-49Interchangeable
interchangeable cross-reference
interchangeable
0251270Interchangeable
interchangeable cross-reference
interchangeable
ST52507Interchangeable
interchangeable cross-reference
interchangeable
34463AXInterchangeable
interchangeable cross-reference
interchangeable
ZINC COATED STE EL-ASTM B-633Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is TYPE-2,STYLE-4, GRADE-B?
TYPE-2,STYLE-4, GRADE-B is a TYPE-2,STYLE-4, GRADE-B.
What parts can replace TYPE-2,STYLE-4, GRADE-B?
There are 6 known substitutes for TYPE-2,STYLE-4, GRADE-B: FFN836, MS35691-49, 0251270 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for TYPE-2,STYLE-4, GRADE-B?
TYPE-2,STYLE-4, GRADE-B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-280-6749. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026