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166183 — 166183

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

166183: 166183.

The 166183 is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, hole_type: DRILLED, head_style: KNURLED NO. 1, head_height: 0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.531 INCHES MINIMUM AND 0.593 INCHES MAXIMUM IN.

This part is cataloged in the U.S. Government catalog under NSN 5305-01-019-5631, 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→ 166183
NSN: 5305-01-019-5631
NIINs: 010195631, 010935348
FSC: 5305 — Screws
CAGE: 21877 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
hole_typeDRILLED
head_styleKNURLED NO. 1
head_height0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.531 INCHES MINIMUM AND 0.593 INCHES MAXIMUM IN
hole_diameter0.063 INCHES NOMINAL IN
hole_quantity1
overall_width0.518 INCHES NOMINAL IN
thread_length0.334 INCHES MINIMUM AND 0.416 INCHES MAXIMUM IN
overall_height0.543 INCHES NOMINAL IN
fastener_length1.344 INCHES MINIMUM AND 1.406 INCHES MAXIMUM IN
NSN5305-01-019-5631
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 166183 · 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: 0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.344 INCHES MINIMUM AND 1.406 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.334 INCHES MINIMUM AND 0.416 INCHES MAXIMUM IN
•
HOLE CONFIGURATION STYLE: ROUND
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
FIRST DIAMETER FROM HEAD: 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN
FASTENER LENGTH1.344 INCHES MINIMUM AND 1.406 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.334 INCHES MINIMUM AND 0.416 INCHES MAXIMUM IN
HOLE CONFIGURATION STYLEROUND
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
FIRST DIAMETER FROM HEAD0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEKNURLED NO. 1
THREAD DIRECTIONRIGHT-HAND
SUBSTITUTES & CROSS-REFERENCES 2
6155-SS-2528-7Reference document
Same NSN cross-reference
Reference document — Secondary reference
1202867-24Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 166183?
166183 is a 166183. It is classified as a MRO (MRO_GENERAL).
What parts can replace 166183?
There are 2 known substitutes for 166183: 6155-SS-2528-7, 1202867-24. Substitute compatibility should be verified for your specific system.
What is the NSN for 166183?
166183 is cataloged in the U.S. Government catalog under NSN 5305-01-019-5631. 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.