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21166 — CAPACITOR,FIXED,METALLIZED,PAPER

✓ Government record, cited
Legrand · MRO · MRO_GENERAL
PRODUCT OVERVIEW

21166: CAPACITOR,FIXED,METALLIZED,PAPER.

USB 2.0 hub to add 4 extra USB ports to your computer to connect your portable devices - Very compact 4 port USB 2.0 hub; ideal for notebook users - Short USB cable attached that can be clicked to the body of the hub - Supports USB 2.0 (up to 480 Mbps) and USB 1.1 (up to 12 Mbps) peripherals This part is cataloged in the U.S. Government catalog under NSN 5310-00-272-5696, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
MRO→ MRO_GENERAL→ 21166
NSN: 5310-00-272-5696
NIINs: 002725696, 004695820, 004976189, 005640324, 012078981, 012276117, 012960187, 014318688, 015306465
FSC: 5310 — Nuts and Washers
CAGE: 70726 — BARLOW ELECTRICAL MFG CO INC
SPECIFICATIONS
materialPLASTIC CASE
nut_styleHEXAGON
body_styleW/O MTG FACILITIES, TERMINALS ON OPPOSITE SURFACES
body_width0.430 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN
nut_height0.187 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
body_height0.590 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN
body_length1.120 INCHES MINIMUM AND 1.220 INCHES MAXIMUM IN
thread_class2B
overall_width0.150 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
inclosure_typeFULLY INCLOSED
overall_height0.270 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN
NSN5310-00-272-5696
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 21166 · Legrand ⚠ 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
•
WIDTH ACROSS FLATS: 0.425 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND A STYLE OR 1 TYPE AND B STYLE
•
NUT HEIGHT: 0.187 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
•
NUT STYLE: HEXAGON
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.425 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
NONDEFINITIVE SPEC/STD DATA1 TYPE AND A STYLE OR 1 TYPE AND B STYLE
NUT HEIGHT0.187 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
NUT STYLEHEXAGON
THREAD CLASS2B
THREAD QUANTITY PER INCH20
SUBSTITUTES & CROSS-REFERENCES 7
2609796Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
MIL-DTL-1222Reference document
Same NSN cross-reference
Reference document — Identification reference
MIL-S-1222Reference document
Same NSN cross-reference
Reference document — Secondary reference
Y-327834 PIECE 153AX153HReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
M1222N1X4C20NBNNSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
6962399-4Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21166?
21166 is a CAPACITOR,FIXED,METALLIZED,PAPER manufactured by Legrand. It is classified as a MRO (MRO_GENERAL).
What parts can replace 21166?
There are 7 known substitutes for 21166: 2609796, MIL-DTL-1222, MIL-S-1222 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21166?
21166 is cataloged in the U.S. Government catalog under NSN 5310-00-272-5696. 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.