PartsTable
Technical Data Sheet
FFB571TYPEA ✓ 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 NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.210 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNF, hardness_rating: 95.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-010-2634, 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
FFB571TYPEA
NSN: 5310-00-010-2634
FSC: 5310
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.210 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
hardness_rating95.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
special_featuresAA
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_across_flats0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
nominal_thread_size0.375 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
NSN5310-00-010-2634
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: FFB571TYPEA · 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
NOMINAL THREAD SIZE: 0.312 INCHES IN
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
THREAD QUANTITY PER INCH: 18
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
WIDTH ACROSS FLATS: 0.500 INCHES NOMINAL IN
NUT STYLE: HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE0.312 INCHES IN
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
THREAD QUANTITY PER INCH18
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
WIDTH ACROSS FLATS0.500 INCHES NOMINAL IN
NUT STYLEHEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
MATERIALSTEEL OVERALL
THREAD CLASS2B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
0111Interchangeable
interchangeable cross-reference
interchangeable
B7/32Interchangeable
interchangeable cross-reference
interchangeable
877475Interchangeable
interchangeable cross-reference
interchangeable
102634Interchangeable
interchangeable cross-reference
interchangeable
MILB857TYPE2STYLEA0RBGRADE1Interchangeable
interchangeable cross-reference
interchangeable
FFB571TYPEA2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FFB571TYPEA?
FFB571TYPEA is a NUT,PLAIN,HEXAGON.
What parts can replace FFB571TYPEA?
There are 15 known substitutes for FFB571TYPEA: 0111, B7/32, 877475 and 12 more. Substitute compatibility should be verified for your specific system.
Is FFB571TYPEA still available?
FFB571TYPEA is currently cancelled.
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