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FFB571TYPEA1 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

FFB571TYPEA1: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, head_style: SQUARE, nut_height: 0.320 INCHES MINIMUM AND 0.337 INCHES MAXIMUM IN, head_height: 0.400 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN, thread_class: 1A A. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-011-4942, 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
FFB571TYPEA1
NSN: 5310-00-011-4942
NIINs: 000114942, 000125491, 002085095
FSC: 5310 — Nuts and Washers
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
head_styleSQUARE
nut_height0.320 INCHES MINIMUM AND 0.337 INCHES MAXIMUM IN
head_height0.400 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN
thread_class1A A
thread_length2.000 INCHES MINIMUM IN
thread_seriesUNF
fastener_length24.000 INCHES NOMINAL IN
thread_directionRIGHT-HAND
features_providedUNFINISHED HEAD
surface_treatmentPHOSPHATE OVERALL
NSN5310-00-011-4942
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: FFB571TYPEA1 · 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: 0.5510 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
NUT HEIGHT: 0.320 INCHES MINIMUM AND 0.337 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PHOSPHATE OVERALL
•
NUT STYLE: HEXAGON
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.5510 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
NUT HEIGHT0.320 INCHES MINIMUM AND 0.337 INCHES MAXIMUM IN
SURFACE TREATMENTPHOSPHATE OVERALL
NUT STYLEHEXAGON
THREAD CLASS2B
THREAD QUANTITY PER INCH24
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 7
31X3RReference document
Same NSN cross-reference
Reference document — Secondary reference
1045064Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS35690-626Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
114942Reference document
Same NSN cross-reference
Reference document — Secondary reference
33800S2Reference document
Same NSN cross-reference
Reference document — Secondary reference
BBTX1FB5Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is FFB571TYPEA1?
FFB571TYPEA1 is a NUT,PLAIN,HEXAGON.
What parts can replace FFB571TYPEA1?
There are 7 known substitutes for FFB571TYPEA1: 31X3R, 1045064, MS35690-626 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FFB571TYPEA1?
FFB571TYPEA1 is cataloged in the U.S. Government catalog under NSN 5310-00-011-4942. This indicates validated use in U.S. government and defense supply chains.
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