PartsTable
Technical Data Sheet
PartsTable / MRO / 21-402
21-402 ✓ Verified by PartsTable
Legrand · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

<b>For all the classic lovers</b><br>ICY BOX offers with this enclosure internal IDE and SATA interfaces and outside a USB 2.0 interface with up to 480 Mbit/s transfer rates. Even though the interfaces are older, the enclosure still fully support HotSwap and Plug & Play, which means, fast & toolless HDD exchange. even in operation.<br><b>Looks good</b><br>Additionally, by using the non-slip adhesive feet and the supplied plastic base, you can wonderfully set the IB-351 vertically.

So it does not slide, saves space at home or work desktop and looks even more classy.<br><b>Fanless quiet</b><br>Even without a fan we can guarantee that the HDDs will not get too hot. This HDD enclosure is made out of aluminium completely and therefore dissipate the heat from inside the enclosure perfectly. Two LED indicators informs us constantly concerning power and HDD activity (read/write) This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-022-6779, indicating validated use in U.S.

government and defense logistics supply chains.

WHERE IT FITS
MRO→ MRO_GENERAL→ 21-402
NSN: 5305-00-022-6779
FSC: 5305
CAGE: 77820 — AMPHENOL CORP DIV AMPHENOL AEROSPACE OPERATIONS (USA)
SPECIFICATIONS
materialPLASTIC VIEWING UNIT WINDOW
drip_trayINCLUDED
unit_typeSINGLE
body_styleSINGLE POLE TYPE
body_width0.750 INCHES MAXIMUM IN
head_styleFLAT COUNTERSUNK
body_length2.189 INCHES MAXIMUM IN
current_typeAC
power_rating0.075 HORSEPOWER INPUT
reset_methodMANUAL
storage_typeGENERAL PURPOSE WAREHOUSE
thread_class2A A
NSN5305-00-022-6779
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 21-402 · Legrand ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SCREW MATERIAL: STEEL COMP 1010 OR STEEL COMP M1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020
•
FASTENER LENGTH: 0.281 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
HEAD DIAMETER: 0.220 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.125 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD ALL MATERIAL RESPONSES
•
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 1,CL 3 FED SPEC 2ND TREATMENT RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
SCREW MATERIALSTEEL COMP 1010 OR STEEL COMP M1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020
FASTENER LENGTH0.281 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
HEAD DIAMETER0.220 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.125 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD ALL MATERIAL RESPONSES
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 1,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 1,CL 3 FED SPEC 2ND TREATMENT RESPONSE
THREAD QUANTITY PER INCH40
THREAD LENGTH0.262 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
RN54Interchangeable
interchangeable cross-reference
interchangeable
B107.38Interchangeable
interchangeable cross-reference
interchangeable
GGG-P-471 TY10Interchangeable
interchangeable cross-reference
interchangeable
21-402Interchangeable
interchangeable cross-reference
interchangeable
D-382-SInterchangeable
interchangeable cross-reference
interchangeable
8325Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21-402?
21-402 is a BOX CONNECTOR,ELECTRICAL manufactured by Legrand. It is classified as a MRO (MRO_GENERAL).
What parts can replace 21-402?
There are 17 known substitutes for 21-402: RN54, B107.38, GGG-P-471 TY10 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21-402?
21-402 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-022-6779. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026