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28230-001 — GUARD,SWITCH

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

28230-001: GUARD,SWITCH.

The GUARD,SWITCH is a the manufacturer industrial component. Key specifications include material: STEEL, head_style: FLAT COUNTERSUNK, head_diameter: 0.257 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN, overall_width: 0.94 INCHES NOMINAL IN, overall_length: 1.68 INCHES NOMINAL IN, fastener_length: 0.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-043-0530, 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
MRO→ MRO_GENERAL→ 28230-001
NSN: 5305-01-043-0530
NIINs: 010430530, 016812824
FSC: 5305 — Screws
CAGE: 74025 — MARATHONNORCO AEROSPACE, INC. DBA MARATHON POWER TECHNOLOGIES COMPANY (USA)
SPECIFICATIONS
materialSTEEL
head_styleFLAT COUNTERSUNK
head_diameter0.257 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN
overall_width0.94 INCHES NOMINAL IN
overall_length1.68 INCHES NOMINAL IN
fastener_length0.500 INCHES NOMINAL IN
mounting_methodUNTHREADED HOLE(S)
countersink_angle81.0 DEGREES NOMINAL
surface_treatmentPAINT
internal_drive_styleSLOT
end_item_identificationAN/SSQ-134
unthreaded_mounting_hole_diameter0.93 INCHES NOMINAL IN
NSN5305-01-043-0530
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 28230-001 · OEM ⚠ 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
•
FASTENER LENGTH: 0.500 INCHES NOMINAL IN
•
HEAD STYLE: FLAT COUNTERSUNK
•
SURFACE TREATMENT: NICKEL OVERALL
•
INTERNAL DRIVE STYLE: SLOT
•
COUNTERSINK ANGLE: 81.0 DEGREES NOMINAL
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
HEAD DIAMETER: 0.257 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
FASTENER LENGTH0.500 INCHES NOMINAL IN
HEAD STYLEFLAT COUNTERSUNK
SURFACE TREATMENTNICKEL OVERALL
INTERNAL DRIVE STYLESLOT
COUNTERSINK ANGLE81.0 DEGREES NOMINAL
MATERIALSTEEL CORROSION RESISTING OVERALL
HEAD DIAMETER0.257 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
28230-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 28230-001?
28230-001 is a GUARD,SWITCH. It is classified as a MRO (MRO_GENERAL).
What parts can replace 28230-001?
There is 1 known substitute for 28230-001: 28230-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 28230-001?
28230-001 is cataloged in the U.S. Government catalog under NSN 5305-01-043-0530. 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.