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Technical Data Sheet
PartsTable / COMPONENT / 12759-00538
12759-00538 ✓ 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,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON EXTENDED WASHER, head_height: 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 1.25 INCHES NOMINAL IN, fastener_length: 1.25 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-556-6211, 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
12759-00538
NSN: 5305-01-556-6211
FSC: 5305
CAGE: 0Y3H3 — FASTENAL COMPANY DBA FASTENAL CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON EXTENDED WASHER
head_height0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
thread_class2A A
thread_length1.25 INCHES NOMINAL IN
fastener_length1.25 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
width_between_flats0.305 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
end_item_identificationMRAP - COMMON NSN - USED ON MAXXPRO CAT I AND 1 OTHER WEAPON SYSTEM; MRAP - MAXXPRO DASH ISS W/OGPK AND W/CROWS
nominal_thread_diameter0.190 INCHES IN
extended_washer_diameter0.384 INCHES MINIMUM AND 0.414 INCHES MAXIMUM IN
NSN5305-01-556-6211
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 12759-00538 · 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
•
MATERIAL: STEEL OVERALL
•
EXTENDED WASHER THICKNESS: 0.019 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
HEAD STYLE: HEXAGON EXTENDED WASHER
•
EXTENDED WASHER DIAMETER: 0.384 INCHES MINIMUM AND 0.414 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYSCREW,HH MACH 10-32 X 1 1/4
EXTENDED WASHER THICKNESS0.019 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
HEAD STYLEHEXAGON EXTENDED WASHER
END ITEM IDENTIFICATIONMRAP - COMMON NSN - USED ON MAXXPRO CAT I AND 1 OTHER WEAPON SYSTEM; MRAP - MAXXPRO DASH ISS W/OGPK AND W/CROWS
EXTENDED WASHER DIAMETER0.384 INCHES MINIMUM AND 0.414 INCHES MAXIMUM IN
HEAD HEIGHT0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
THREAD CLASS2A A
FASTENER LENGTH1.25 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
28950Interchangeable
interchangeable cross-reference
interchangeable
27604Interchangeable
interchangeable cross-reference
interchangeable
674-1018-00Interchangeable
interchangeable cross-reference
interchangeable
B-5708-1Interchangeable
interchangeable cross-reference
interchangeable
SSM50PInterchangeable
interchangeable cross-reference
interchangeable
CL-22-SSPS-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12759-00538?
12759-00538 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 12759-00538?
There are 7 known substitutes for 12759-00538: 28950, 27604, 674-1018-00 and 4 more. Substitute compatibility should be verified for your specific system.
Is 12759-00538 still available?
12759-00538 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026