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Technical Data Sheet
PartsTable / COMPONENT / 28311S7
28311S7 ✓ 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: OVAL COUNTERSUNK, thread_class: 2A A, head_diameter: 0.257 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN, thread_length: 0.312 INCHES MAXIMUM IN, fastener_length: 0.312 INCHES NOMINAL IN, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-013-4159, 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
28311S7
NSN: 5305-00-013-4159
FSC: 5305
CAGE: 23040 — FORD MOTOR CO FORD PARTS AND SERVICE DIV GOVERNMENT PART SALES (USA)
SPECIFICATIONS
head_styleOVAL COUNTERSUNK
thread_class2A A
head_diameter0.257 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN
thread_length0.312 INCHES MAXIMUM IN
fastener_length0.312 INCHES NOMINAL IN
thread_directionRIGHT-HAND
countersink_angle80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
internal_drive_styleSLOT
nominal_thread_diameter0.138 INCHES IN
screw_surface_treatmentCADMIUM OR ZINC
thread_quantity_per_inch32
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-00-013-4159
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 28311S7 · 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
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD DIAMETER: 0.138 INCHES IN
•
THREAD CLASS: 2A A
•
FASTENER LENGTH: 0.312 INCHES NOMINAL IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-630 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-630 FED SPEC 2ND MATERIAL RESPONSE OR QQ-S-630 FED SPEC 3RD MATERIAL RESPONSE OR QQ-S-630 FED SPEC 4TH MATERIAL RESPONSE OR QQ-S-630 FED SPEC 5TH MATERIAL RESPONSE OR QQ-S-631 FED SPEC ALL MATERIAL RESPONSES OR QQ-S-631 FED SPEC 6TH MATERIAL RESPONSE OR QQ-S-631 FED SPEC 7TH MATERIAL RESPONSE OR QQ-S-631 FED SPEC 8TH MATERIAL RESPONSE OR QQ-S-631 FED SPEC 9TH MATERIAL RESPONSE OR QQ-S-631 FED SPEC 10TH MATERIAL RESPONSE OR QQ-S-631 FED SPEC 11TH MATERIAL RESPONSE OR QQ-S-634 FED SPEC 12TH MATERIAL RESPONSE OR QQ-S-634 FED SPEC 13TH MATERIAL RESPONSE OR QQ-S-634 FED SPEC 14TH MATERIAL RESPONSE OR QQ-S-634 FED SPEC 15TH MATERIAL RESPONSE OR QQ-S-634 FED SPEC 16TH MATERIAL RESPONSE OR QQ-S-634 FED SPEC 17TH MATERIAL RESPONSE
•
INTERNAL DRIVE STYLE: SLOT
•
THREAD QUANTITY PER INCH: 32
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD DIAMETER0.138 INCHES IN
THREAD CLASS2A A
FASTENER LENGTH0.312 INCHES NOMINAL IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-630 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-630 FED SPEC 2ND MATERIAL RESPONSE OR QQ-S-630 FED SPEC 3RD MATERIAL RESPONSE OR QQ-S-630 FED SPEC 4TH MATERIAL RESPONSE OR QQ-S-630 FED SPEC 5TH MATERIAL RESPONSE OR QQ-S-631 FED SPEC ALL MATERIAL RESPONSES OR QQ-S-631 FED SPEC 6TH MATERIAL RESPONSE OR QQ-S-631 FED SPEC 7TH MATERIAL RESPONSE OR QQ-S-631 FED SPEC 8TH MATERIAL RESPONSE OR QQ-S-631 FED SPEC 9TH MATERIAL RESPONSE OR QQ-S-631 FED SPEC 10TH MATERIAL RESPONSE OR QQ-S-631 FED SPEC 11TH MATERIAL RESPONSE OR QQ-S-634 FED SPEC 12TH MATERIAL RESPONSE OR QQ-S-634 FED SPEC 13TH MATERIAL RESPONSE OR QQ-S-634 FED SPEC 14TH MATERIAL RESPONSE OR QQ-S-634 FED SPEC 15TH MATERIAL RESPONSE OR QQ-S-634 FED SPEC 16TH MATERIAL RESPONSE OR QQ-S-634 FED SPEC 17TH MATERIAL RESPONSE
INTERNAL DRIVE STYLESLOT
THREAD QUANTITY PER INCH32
THREAD DIRECTIONRIGHT-HAND
HEAD DIAMETER0.257 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN
COUNTERSINK ANGLE80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
101063Interchangeable
interchangeable cross-reference
interchangeable
FFS92TYPE1STYLE6SInterchangeable
interchangeable cross-reference
interchangeable
110624Interchangeable
interchangeable cross-reference
interchangeable
51727Interchangeable
interchangeable cross-reference
interchangeable
134131Interchangeable
interchangeable cross-reference
interchangeable
134225Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 28311S7?
28311S7 is a SCREW,MACHINE.
What parts can replace 28311S7?
There are 13 known substitutes for 28311S7: 101063, FFS92TYPE1STYLE6S, 110624 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 28311S7?
28311S7 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-013-4159. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026