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Technical Data Sheet
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T21S8 — NUT,PLAIN,SQUARE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

T21S8: NUT,PLAIN,SQUARE.

The NUT,PLAIN,SQUARE is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5310-00-262-9717, 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
T21S8
NSN: 5310-00-262-9717
FSC: 5310 — Nuts and Washers
CAGE: 76126 — BENDIX CORP THE FRICTION MATERIALS DIV (USA)
SPECIFICATIONS
Part NumberT21S8
NSN5310-00-262-9717
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: T21S8 · 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
SUBSTITUTES & CROSS-REFERENCES 6
4046663Reference document
Same NSN cross-reference
Reference document — Secondary reference
925479Reference document
Same NSN cross-reference
Reference document — Secondary reference
501028Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
6UU0891Reference document
Same NSN cross-reference
Reference document — Secondary reference
2152474Reference document
Same NSN cross-reference
Reference document — Secondary reference
352668Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is T21S8?
T21S8 is a NUT,PLAIN,SQUARE.
What parts can replace T21S8?
There are 6 known substitutes for T21S8: 4046663, 925479, 501028 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for T21S8?
T21S8 is cataloged in the U.S. Government catalog under NSN 5310-00-262-9717. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.