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20-5028 — RELAY,ELECTROMAGNETIC

✓ Government record, cited
Hama · BOLT SCREW
PRODUCT OVERVIEW

20-5028: RELAY,ELECTROMAGNETIC.

The RELAY,ELECTROMAGNETIC is a Hama industrial component. Key specifications include length: 28.0 MILLIMETERS NOMINAL MM, material: STEEL OVERALL, duty_type: CONTINUOUS, hole_type: DRILLED, head_style: HEXAGON, head_height: 0.312 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-276-8209, 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
20-5028
NSN: 5306-00-276-8209
NIINs: 002768209, 009944602, 016582897, 016854686
FSC: 5306 — Bolts
CAGE: 92392 — ALLIS-CHALMERS CORP (USA)
SPECIFICATIONS
length28.0 MILLIMETERS NOMINAL MM
materialSTEEL OVERALL
duty_typeCONTINUOUS
hole_typeDRILLED
head_styleHEXAGON
head_height0.312 INCHES NOMINAL IN
thread_class2B SINGLE MOUNTING FACILITY
coil_quantity1
hole_diameter0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
hole_quantity1
overall_width1.000 INCHES NOMINAL IN
thread_length1.250 INCHES MAXIMUM IN
NSN5306-00-276-8209
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 20-5028 · Hama ⚠ 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
•
HEAD HEIGHT: 0.312 INCHES NOMINAL IN
•
FASTENER LENGTH: 3.250 INCHES NOMINAL IN
•
THREAD LENGTH: 1.250 INCHES MAXIMUM IN
•
HOLE CONFIGURATION STYLE: HEXAGON FLATS
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
FEATURES PROVIDED: UNFINISHED HEAD
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.312 INCHES NOMINAL IN
FASTENER LENGTH3.250 INCHES NOMINAL IN
THREAD LENGTH1.250 INCHES MAXIMUM IN
HOLE CONFIGURATION STYLEHEXAGON FLATS
NOMINAL THREAD DIAMETER0.375 INCHES IN
FEATURES PROVIDEDUNFINISHED HEAD
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.625 INCHES NOMINAL IN
THREAD CLASS2A A
SUBSTITUTES & CROSS-REFERENCES 3
FFB575Reference document
Same NSN cross-reference
Reference document — Replaced / superseded reference
0205028Reference document
Same NSN cross-reference
Reference document — Secondary reference
0205028-4Reference document
Same NSN cross-reference
Reference document — Secondary 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 20-5028?
20-5028 is a RELAY,ELECTROMAGNETIC manufactured by Hama.
What parts can replace 20-5028?
There are 3 known substitutes for 20-5028: FFB575, 0205028, 0205028-4. Substitute compatibility should be verified for your specific system.
What is the NSN for 20-5028?
20-5028 is cataloged in the U.S. Government catalog under NSN 5306-00-276-8209. 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.