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189906 — SCREW,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

189906: SCREW,MACHINE.

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FILLISTER, head_height: 0.106 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN, thread_length: 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN, screw_material: STEEL. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-156-2678, 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
189906
NSN: 5305-00-156-2678
FSC: 5305 — Screws
CAGE: 66503 — WOODWARD, INC. DIV FUEL SYSTEMS AND CONTROLS (USA)
SPECIFICATIONS
head_styleFILLISTER
head_height0.106 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
thread_length0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
screw_materialSTEEL
fastener_length0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
internal_drive_styleSLOT
nominal_thread_diameter0.164 INCHES IN
screw_surface_treatmentPASSIVATE
minimum_tensile_strength35000 POUNDS PER SQUARE INCH LBS
NSN5305-00-156-2678
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 189906 · 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: 0.106 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT: PASSIVATE
•
FASTENER LENGTH: 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763A,SERIES 400 FED SPEC SINGLE MATERIAL RESPONSE OR MIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE A
•
THREAD LENGTH: 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.164 INCHES IN
•
HEAD STYLE: FILLISTER
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.106 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTPASSIVATE
FASTENER LENGTH0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763A,SERIES 400 FED SPEC SINGLE MATERIAL RESPONSE OR MIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE A
THREAD LENGTH0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.164 INCHES IN
HEAD STYLEFILLISTER
THREAD DIRECTIONRIGHT-HAND
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 4S STYLE
SCREW MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 5
0457-274Reference document
Same NSN cross-reference
Reference document — Secondary reference
117455Reference document
Same NSN cross-reference
Reference document — Secondary reference
AN500AC8-6Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
FFS92ANDTYPE1ANDSTYLE4SReference document
Same NSN cross-reference
Reference document — Identification reference
AS80677Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 189906?
189906 is a SCREW,MACHINE.
What parts can replace 189906?
There are 5 known substitutes for 189906: 0457-274, 117455, AN500AC8-6 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 189906?
189906 is cataloged in the U.S. Government catalog under NSN 5305-00-156-2678. 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.