PartsTable
Technical Data Sheet
Download PDF

81581-F — NUT,SELF-LOCKING,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

81581-F: NUT,SELF-LOCKING,ROUND.

The NUT,SELF-LOCKING,ROUND is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON LOCKING INSERT, nut_style: ROUND, nut_diameter: 1.547 INCHES MINIMUM AND 1.562 INCHES MAXIMUM IN, nut_thickness: 0.438 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN, thread_series: UNS, locking_feature: PREVAILING TORQUE WITH NONMETALLIC INSERT. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-825-5723, 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
81581-F
NSN: 5310-00-825-5723
NIINs: 008255723, 010562966
FSC: 5310 — Nuts and Washers
CAGE: 95402 — ELECTRIC BOAT CORP DBA ELECTRO DYNAMIC (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON LOCKING INSERT
nut_styleROUND
nut_diameter1.547 INCHES MINIMUM AND 1.562 INCHES MAXIMUM IN
nut_thickness0.438 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
thread_seriesUNS
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
drive_point_width0.168 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
small_end_diameter1.312 INCHES NOMINAL IN
undercut_thickness0.094 INCHES NOMINAL IN
nominal_thread_size0.969 INCHES IN
drive_point_quantity4
NSN5310-00-825-5723
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 81581-F · 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
•
THREAD SERIES: UNS
•
THREAD PITCH DIAMETERS: +0.9453 TO 0.9487 INCHES IN
•
DRIVE POINT WIDTH: 0.188 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.969 INCHES IN
•
NUT DIAMETER: 1.188 INCHES NOMINAL IN
•
DRIVE POINT DEPTH: 0.094 INCHES NOMINAL IN
•
LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT
TECHNICAL CHARACTERISTICS
THREAD SERIESUNS
THREAD PITCH DIAMETERS+0.9453 TO 0.9487 INCHES IN
DRIVE POINT WIDTH0.188 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.969 INCHES IN
NUT DIAMETER1.188 INCHES NOMINAL IN
DRIVE POINT DEPTH0.094 INCHES NOMINAL IN
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
NUT THICKNESS0.359 INCHES NOMINAL IN
DRIVE POINT QUANTITY4
SUBSTITUTES & CROSS-REFERENCES 2
P21337-001-01Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
BLN05Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
Ready to buy 81581-F?
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 81581-F?
81581-F is a NUT,SELF-LOCKING,ROUND.
What parts can replace 81581-F?
There are 2 known substitutes for 81581-F: P21337-001-01, BLN05. Substitute compatibility should be verified for your specific system.
What is the NSN for 81581-F?
81581-F is cataloged in the U.S. Government catalog under NSN 5310-00-825-5723. 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 — 81581-F