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91684 — SPACER,RING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

91684: SPACER,RING.

The SPACER,RING is a the manufacturer industrial component. Key specifications include end_item_identification: MRAP - COMMON NSN - USED ON 2 MRAP VARIANTS AND 3 OTHER WEAPON SYSTEMS.. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-448-1911, 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
91684
NSN: 5310-00-448-1911
NIINs: 004481911, 010597385
FSC: 5310 — Nuts and Washers
CAGE: 70408 — AT AND T CORP (USA)
SPECIFICATIONS
end_item_identificationMRAP - COMMON NSN - USED ON 2 MRAP VARIANTS AND 3 OTHER WEAPON SYSTEMS.
NSN5310-00-448-1911
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91684 · 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: UNEF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
•
NUT DIAMETER: 0.562 INCHES NOMINAL IN
•
NUT THICKNESS: 0.062 INCHES NOMINAL IN
•
NUT STYLE: ROUND
•
THREAD CLASS: 2B
•
THREAD QUANTITY PER INCH: 28
TECHNICAL CHARACTERISTICS
THREAD SERIESUNEF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.438 INCHES IN
NUT DIAMETER0.562 INCHES NOMINAL IN
NUT THICKNESS0.062 INCHES NOMINAL IN
NUT STYLEROUND
THREAD CLASS2B
THREAD QUANTITY PER INCH28
MATERIALSTEEL CORROSION RESISTING OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
53000087-000Reference document
Same NSN cross-reference
Reference document — Design control — primary 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 91684?
91684 is a SPACER,RING.
What parts can replace 91684?
There is 1 known substitute for 91684: 53000087-000. Substitute compatibility should be verified for your specific system.
What is the NSN for 91684?
91684 is cataloged in the U.S. Government catalog under NSN 5310-00-448-1911. 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.