PartsTable
Technical Data Sheet
221-401 ✓ Verified by PartsTable
Thule · 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

- Easy access to contents through oversized, wide mouth opening<br>- Can be carried in two different ways: as a backpack and as a duffel (all straps tuck away when not in use)<br>- Protects contents from the elements and folds for easy storage due to the durable and waterproof tarpaulin fabric<br>- Keeps gear organized and contained with internal mesh pockets<br>- Easy to prevent contents from falling to the bottom of the bag in backpack mode thanks to external compression straps<br>- Padded bottom protects your gear from the ground<br>- Lockable, zippered side pocket keeps small items secure and within reach (lock sold separately)<br>- Quick access to smaller items through external stash pocket This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-054-5590, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
221-401
NSN: 5315-00-054-5590
FSC: 5315
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)
SPECIFICATIONS
colorCOLORLESS OR BLACK
width8.500 INCHES NOMINAL IN
length11.000 INCHES NOMINAL IN
materialPLASTIC BASIC
tie_stringNOT INCLUDED
ring_binderNOT INCLUDED
slide_fastenerINCLUDED
special_featuresDURACLIP REPORT COVER; NON-GLARE CLEAR FRONT, COLORED BACK COVER
opening_side_quantity3
NSN5315-00-054-5590
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 221-401 · Thule ⚠ 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
PIN SIZE DESIGNATION: 10
FIRST END OUTER RADIUS: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
PIN OVERALL LENGTH: 3.970 INCHES MINIMUM AND 4.030 INCHES MAXIMUM IN
MATERIAL: STEEL OVERALL
SURFACE FINISH: 63.0 MICROINCHES SHANK END
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
FIRST END LOCATION: BOTH ENDS
TECHNICAL CHARACTERISTICS (FLIS)
PIN SIZE DESIGNATION10
FIRST END OUTER RADIUS0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
PIN OVERALL LENGTH3.970 INCHES MINIMUM AND 4.030 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
SURFACE FINISH63.0 MICROINCHES SHANK END
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
FIRST END LOCATIONBOTH ENDS
FIRST END STYLEOVAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
0904230Interchangeable
interchangeable cross-reference
interchangeable
25F1Interchangeable
interchangeable cross-reference
interchangeable
5117Interchangeable
interchangeable cross-reference
interchangeable
22140-1Interchangeable
interchangeable cross-reference
interchangeable
2214-BLAInterchangeable
interchangeable cross-reference
interchangeable
INCLP203401Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 221-401?
221-401 is a ISOLATION MOUNT,TURBINE manufactured by Thule.
What parts can replace 221-401?
There are 8 known substitutes for 221-401: 0904230, 25F1, 5117 and 5 more. Substitute compatibility should be verified for your specific system.
Is 221-401 still available?
221-401 is currently cancelled.
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