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S-1657 — SHROUD,FAN,RADIATOR

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

S-1657: SHROUD,FAN,RADIATOR.

The SHROUD,FAN,RADIATOR is a the manufacturer thermal management component critical for maintaining optimal operating temperatures in enterprise hardware. Key specifications include material: STEEL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-186-0959, 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
S-1657
NSN: 5310-00-186-0959
NIINs: 001860959, 012817948
FSC: 5310 — Nuts and Washers
CAGE: 47496 — THE DEWEY ELECTRONICS CORPORATION DIV PITOMETER LOG DIVISION (USA)
SPECIFICATIONS
materialSTEEL
NSN5310-00-186-0959
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S-1657 · 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
•
INTERNAL PREBENT KEY WIDTH: 0.110 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
•
OVERALL DISTANCE INCLUDING KEYS: 0.875 INCHES MAXIMUM IN
•
HARDNESS RATING: 50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 0.625 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.038 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN
•
DEPARTURE FROM CITED DOCUMENT: AS MODIFIED BY EXTERNALPREBENT KEY WIDTH
TYPICAL APPLICATIONS
  • Server thermal management and cooling
  • Hot-swap fan replacement in production environments
  • Redundant cooling for high-availability systems
TECHNICAL CHARACTERISTICS
INTERNAL PREBENT KEY WIDTH0.110 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS0.875 INCHES MAXIMUM IN
HARDNESS RATING50.0 ROCKWELL B MINIMUM AND 81.0 ROCKWELL B MAXIMUM
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER0.625 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
MATERIAL THICKNESS0.038 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN
DEPARTURE FROM CITED DOCUMENTAS MODIFIED BY EXTERNALPREBENT KEY WIDTH
EXTERNAL KEY QUANTITY9
INTERNAL PREBENT KEY LENGTH0.062 INCHES MINIMUM AND 0.093 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 7
W00Reference document
Same NSN cross-reference
Reference document — Secondary reference
D8465PC33Reference document
Same NSN cross-reference
Reference document — Secondary reference
D8950PC33Reference document
Same NSN cross-reference
Reference document — Secondary reference
127680Reference document
Same NSN cross-reference
Reference document — Secondary reference
DM6783PC78Reference document
Same NSN cross-reference
Reference document — Secondary reference
D7804REVAPC33Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is S-1657?
S-1657 is a SHROUD,FAN,RADIATOR.
What parts can replace S-1657?
There are 7 known substitutes for S-1657: W00, D8465PC33, D8950PC33 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S-1657?
S-1657 is cataloged in the U.S. Government catalog under NSN 5310-00-186-0959. 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.