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G851 — RELAY HEAD,COMPUTER

✓ Government record, cited
— · STORAGE_HDD · 3.5_SATA_HDD
PRODUCT OVERVIEW

G851: RELAY HEAD,COMPUTER.

The RELAY HEAD,COMPUTER is a the manufacturer industrial component. Key specifications include material: STEEL, bore_diameter: 0.3130 INCHES NOMINAL IN, overall_length: 2.250 INCHES NOMINAL IN, bore_counterbore: NOT INCLUDED, bore_countersink: NOT INCLUDED, outside_diameter: 0.5625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 2815-00-482-5893, 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
STORAGE_HDD→ 3.5_SATA_HDD→ G851
NSN: 2815-00-482-5893
NIINs: 004825893, 004896752
FSC: 2815 — Diesel Engines and Components
CAGE: 31033 — TRW INC TRW INTL TRADE GOVERNMENT SALES DEPT (USA)
SPECIFICATIONS
materialSTEEL
bore_diameter0.3130 INCHES NOMINAL IN
overall_length2.250 INCHES NOMINAL IN
bore_counterboreNOT INCLUDED
bore_countersinkNOT INCLUDED
outside_diameter0.5625 INCHES NOMINAL IN
style_designatorPLAIN, SHOULDERED
bb_end_shank_diameter0.500 INCHES NOMINAL IN
major_diameter_length1.500 INCHES NOMINAL IN
end_item_identificationCOMPUTER
shoulder_first_fillet_radius0.266 INCHES NOMINAL IN
NSN2815-00-482-5893
COMPONENT DIAGRAM
RELEASE LATCH — NL-SAS 7.2K G851 OEM NL-SAS INTERFACE INTERPOSER SAS drive in SATA tray? Check board compatibility 3.5" (101.6 x 146mm) LFF 3.5" DRIVE | — | NL-SAS 7.2K NL-SAS uses SAS protocol at 7.2K RPM | SAS backplane supports SATA, not reverse Tray generation matters | Gen8 LFF tray differs from Gen10 TITLE LFF 3.5" DRIVE PN G851 MFR OEM
KEY FEATURES
•
MAJOR DIAMETER LENGTH: 1.500 INCHES NOMINAL IN
•
BB END SHANK DIAMETER: 0.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN, SHOULDERED
•
BORE COUNTERBORE: NOT INCLUDED
•
OUTSIDE DIAMETER: 0.5625 INCHES NOMINAL IN
•
BORE DIAMETER: 0.3130 INCHES NOMINAL IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
MAJOR DIAMETER LENGTH1.500 INCHES NOMINAL IN
BB END SHANK DIAMETER0.500 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN, SHOULDERED
OVERALL LENGTH2.250 INCHES NOMINAL IN
BORE COUNTERBORENOT INCLUDED
OUTSIDE DIAMETER0.5625 INCHES NOMINAL IN
BORE DIAMETER0.3130 INCHES NOMINAL IN
MATERIALSTEEL
SHOULDER FIRST FILLET RADIUS0.266 INCHES NOMINAL IN
BORE COUNTERSINKNOT INCLUDED
SUBSTITUTES & CROSS-REFERENCES 2
74504475Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
G586Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is G851?
G851 is a RELAY HEAD,COMPUTER. It is classified as a STORAGE_HDD (3.5_SATA_HDD).
What parts can replace G851?
There are 2 known substitutes for G851: 74504475, G586. Substitute compatibility should be verified for your specific system.
What is the NSN for G851?
G851 is cataloged in the U.S. Government catalog under NSN 2815-00-482-5893. 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.