PartsTable
Technical Data Sheet
31109S ✓ Verified by PartsTable
· BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FILLISTER, head_height: 0.102 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: 0.875 INCHES MINIMUM IN, screw_material: STEEL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-290-3320, 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
31109S
NSN: 5305-00-290-3320
FSC: 5305
CAGE: 23040 — FORD MOTOR CO FORD PARTS AND SERVICE DIV GOVERNMENT PART SALES (USA)
SPECIFICATIONS
head_styleFILLISTER
head_height0.102 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
thread_length0.875 INCHES MINIMUM IN
screw_materialSTEEL
fastener_length0.875 INCHES NOMINAL IN
thread_directionRIGHT-HAND
internal_drive_styleSLOT
nominal_thread_diameter0.164 INCHES IN
minimum_tensile_strength60000 POUNDS PER SQUARE INCH LBS
thread_quantity_per_inch32
NSN5305-00-290-3320
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 31109S · 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
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OR 66 FED STD SINGLE MATERIAL RESPONSE
HEAD STYLE: FILLISTER
THREAD DIRECTION: RIGHT-HAND
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
INTERNAL DRIVE STYLE: SLOT
THREAD CLASS: 2A A
FASTENER LENGTH: 0.875 INCHES NOMINAL IN
MINIMUM TENSILE STRENGTH: 60000 POUNDS PER SQUARE INCH LBS
TECHNICAL CHARACTERISTICS (FLIS)
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OR 66 FED STD SINGLE MATERIAL RESPONSE
HEAD STYLEFILLISTER
THREAD DIRECTIONRIGHT-HAND
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
INTERNAL DRIVE STYLESLOT
THREAD CLASS2A A
FASTENER LENGTH0.875 INCHES NOMINAL IN
MINIMUM TENSILE STRENGTH60000 POUNDS PER SQUARE INCH LBS
HEAD HEIGHT0.102 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.164 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
321GXInterchangeable
interchangeable cross-reference
interchangeable
18843FXInterchangeable
interchangeable cross-reference
interchangeable
118757Interchangeable
interchangeable cross-reference
interchangeable
100715Interchangeable
interchangeable cross-reference
interchangeable
0A3563MPA16Interchangeable
interchangeable cross-reference
interchangeable
5L5811-004-95Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 31109S?
31109S is a SCREW,MACHINE.
What parts can replace 31109S?
There are 11 known substitutes for 31109S: 321GX, 18843FX, 118757 and 8 more. Substitute compatibility should be verified for your specific system.
Is 31109S still available?
31109S is currently cancelled.
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