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186399 — SCREW,MACHINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

186399: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: UNDERCUT PAN NO. 2, head_height: 0.041 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.171 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN, thread_length: 0.120 INCHES MINIMUM AND 0.151 INCHES MAXIMUM IN, screw_material: STEEL COMP 1010.

This part is cataloged in the U.S. Government catalog under NSN 5310-00-183-4406, 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
186399
NSN: 5310-00-183-4406
NIINs: 001834406, 009569529
FSC: 5310 — Nuts and Washers
CAGE: 66503 — WOODWARD, INC. DIV FUEL SYSTEMS AND CONTROLS (USA)
SPECIFICATIONS
head_styleUNDERCUT PAN NO. 2
head_height0.041 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.171 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN
thread_length0.120 INCHES MINIMUM AND 0.151 INCHES MAXIMUM IN
screw_materialSTEEL COMP 1010
fastener_length0.156 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
internal_drive_styleSLOT
nominal_thread_diameter0.086 INCHES IN
screw_surface_treatmentZINC
thread_quantity_per_inch56
NSN5310-00-183-4406
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 186399 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-5541 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-A-8625 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
•
OVERALL DIAMETER: 0.433 INCHES MINIMUM AND 0.458 INCHES MAXIMUM IN
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/5 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
NONDEFINITIVE SPEC/STD DATA: A TYPE AND 2 GRADE AND D CLASS
•
SURFACE TREATMENT: CHROMATE OR ANODIZE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-A-8625 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
OVERALL DIAMETER0.433 INCHES MINIMUM AND 0.458 INCHES MAXIMUM IN
CRITICALITY CODE JUSTIFICATIONFEAT
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/5 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
NONDEFINITIVE SPEC/STD DATAA TYPE AND 2 GRADE AND D CLASS
SPECIAL FEATURESTOLERANCES,FIT RESTRICTIONS,MATERIAL PROPERTIES AND MANUFACTURING PROCESS
SURFACE TREATMENTCHROMATE OR ANODIZE OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALALUMINUM ALLOY 2024 OVERALL
SUBSTITUTES & CROSS-REFERENCES 9
5310PL0150736Reference document
Same NSN cross-reference
Reference document — Informative reference only
10116636Reference document
Same NSN cross-reference
Reference document — Informative reference only
004-003081-034Reference document
Same NSN cross-reference
Reference document — Secondary reference
NAS1149D0363JSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
SMB208868-10Reference document
Same NSN cross-reference
Reference document — Secondary reference
5310PL1696501Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 186399?
186399 is a SCREW,MACHINE.
What parts can replace 186399?
There are 9 known substitutes for 186399: 5310PL0150736, 10116636, 004-003081-034 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 186399?
186399 is cataloged in the U.S. Government catalog under NSN 5310-00-183-4406. 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.