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179857 — RETAINER,ELECTRICAL SWITCH

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

179857: RETAINER,ELECTRICAL SWITCH.

The RETAINER,ELECTRICAL SWITCH is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 0.272 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.875 INCHES MAXIMUM IN, fastener_length: 0.875 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-069-5572, 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→ 179857
NSN: 5305-00-069-5572
NIINs: 000695572, 005103675
FSC: 5305 — Screws
CAGE: 72582 — ROLLS-ROYCE SOLUTIONS AMERICA INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.272 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
thread_class2A A
thread_length0.875 INCHES MAXIMUM IN
fastener_length0.875 INCHES NOMINAL IN
hardness_rating23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
special_featuresSTEEL,MIL-S-5059 COMP 302,1/4 HARD,2.880 IN. O/A LG,1.760 IN. O/A W,1.750 IN. O/A H IN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_between_flats0.612 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
end_item_identificationAIRCRAFT MODEL T33
NSN5305-00-069-5572
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 179857 · 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
•
HEAD HEIGHT: 0.272 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.875 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.875 INCHES MAXIMUM IN
•
HARDNESS RATING: 23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.438 INCHES IN
•
HEAD STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.272 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
FASTENER LENGTH0.875 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.875 INCHES MAXIMUM IN
HARDNESS RATING23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.438 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.612 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 6
0000179857Reference document
Same NSN cross-reference
Reference document — Secondary reference
FF-S-85Reference document
Same NSN cross-reference
Reference document — Identification reference
5305PL0944948Reference document
Same NSN cross-reference
Reference document — Informative reference only
MS35297-84Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS90725-84Reference document
Same NSN cross-reference
Reference document — Secondary reference
2-150-020-255Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 179857?
179857 is a RETAINER,ELECTRICAL SWITCH. It is classified as a MRO (MRO_GENERAL).
What parts can replace 179857?
There are 6 known substitutes for 179857: 0000179857, FF-S-85, 5305PL0944948 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 179857?
179857 is cataloged in the U.S. Government catalog under NSN 5305-00-069-5572. 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.