PartsTable
Technical Data Sheet
F3721 ✓ Verified by PartsTable
Hasbro · 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

Web-out with the exciting Spidey and His Amazing Friends Spider Crawl-R HQ playset! This 2-in-1 Super Hero playset with lights and sounds converts from a large-scale rolling vehicle into a 2-foot-tall HQ tower! When the playset is in tower mode, kids can imagine planning missions at the command center, stage a pretend show using the included instrument accessories, swing on the web arm, and more! Pull out the ramp, and the Spidey action figure can speed down on the included motorcycle! In both vehicle mode and playset mode, preschoolers can eject the web bumper to knock troublemakers out of the way! With lights, sounds, and phrases inspired by the preschool Marvel show, kids ages 3 and up will love imagining sensational adventures with this 2-in-1 Team Spidey headquarters playset. Copyright MARVEL. All trademarks and registered trademarks are the property of their respective owners.

Hasbro and all related terms are trademarks of Hasbro.<br>TEAM SPIDEY HEADQUARTERS PLAYSET: This excitin This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-176-8109, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
F3721
NSN: 5310-00-176-8109
FSC: 5310
CAGE: 0CSK6 — WINCO, INC. (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSLOTTED, HEXAGON
nut_height0.172 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNF
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_across_flats0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
nominal_thread_size0.312 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
bearing_surface_finish125.0 MICROINCHES
thread_quantity_per_inch24
NSN5310-00-176-8109
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: F3721 · Hasbro ⚠ 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: UNF
THREAD QUANTITY PER INCH: 24
NOMINAL THREAD SIZE: 0.312 INCHES IN
BEARING SURFACE FINISH: 125.0 MICROINCHES
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
NUT HEIGHT: 0.172 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
WIDTH ACROSS FLATS: 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIESUNF
THREAD QUANTITY PER INCH24
NOMINAL THREAD SIZE0.312 INCHES IN
BEARING SURFACE FINISH125.0 MICROINCHES
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NUT HEIGHT0.172 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
4377Interchangeable
interchangeable cross-reference
interchangeable
G231889-1Interchangeable
interchangeable cross-reference
interchangeable
502X64Interchangeable
interchangeable cross-reference
interchangeable
1756Interchangeable
interchangeable cross-reference
interchangeable
24BG113DInterchangeable
interchangeable cross-reference
interchangeable
B12J11KInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is F3721?
F3721 is a NUT,PLAIN,SLOTTED,HEXAGON manufactured by Hasbro.
What parts can replace F3721?
There are 20 known substitutes for F3721: 4377, G231889-1, 502X64 and 17 more. Substitute compatibility should be verified for your specific system.
Is F3721 still available?
F3721 is currently cancelled.
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