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Technical Data Sheet
PartsTable / COMPONENT / 91257A722
91257A722 ✓ 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 head_style: HEXAGON, head_height: 0.310 INCHES NOMINAL IN, thread_class: COARSE, thread_length: 1.250 INCHES NOMINAL IN, fastener_length: 2.500 INCHES NOMINAL IN, special_features: GRADE 8, HIGH STRENGTH, 0.500 IN FASTENER DIAMETER, MINIMUM TENSILE STRENGTH 150000PSI, ROCKWELL HARDNESS C33-39 IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-071-2073, 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
91257A722
NSN: 5305-00-071-2073
FSC: 5305
CAGE: 2V507 — MCMASTER-CARR SUPPLY COMPANY (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.310 INCHES NOMINAL IN
thread_classCOARSE
thread_length1.250 INCHES NOMINAL IN
fastener_length2.500 INCHES NOMINAL IN
special_featuresGRADE 8, HIGH STRENGTH, 0.500 IN FASTENER DIAMETER, MINIMUM TENSILE STRENGTH 150000PSI, ROCKWELL HARDNESS C33-39 IN
thread_directionRIGHT-HAND
surface_treatmentZINC AND CHROMATE OVERALL
width_between_flats0.750 INCHES NOMINAL IN
nominal_thread_diameter0.500 INCHES IN
thread_quantity_per_inch13
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-00-071-2073
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91257A722 · 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
•
SURFACE FINISH: 63.0 MICROINCHES THREADS
•
THREAD QUANTITY PER INCH: 13
•
MINIMUM TENSILE STRENGTH: 150000 POUNDS PER SQUARE INCH LBS
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAEJ429 GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR SSTMA354 GRADE BD ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE FINISH63.0 MICROINCHES THREADS
THREAD QUANTITY PER INCH13
END ITEM IDENTIFICATIONMULTIPLE LAUNCH ROCKET SYSTEM (MLRS); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE; LOGISTICS SUPPORT VESSEL
MINIMUM TENSILE STRENGTH150000 POUNDS PER SQUARE INCH LBS
NOMINAL THREAD DIAMETER0.500 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAEJ429 GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR SSTMA354 GRADE BD ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD CLASS2A A
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
13840Interchangeable
interchangeable cross-reference
interchangeable
70264Interchangeable
interchangeable cross-reference
interchangeable
100570Interchangeable
interchangeable cross-reference
interchangeable
PLD 01-08/PT-5Interchangeable
interchangeable cross-reference
interchangeable
MS90725-117Interchangeable
interchangeable cross-reference
interchangeable
91257A722Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 91257A722?
91257A722 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 91257A722?
There are 15 known substitutes for 91257A722: 13840, 70264, 100570 and 12 more. Substitute compatibility should be verified for your specific system.
Is 91257A722 still available?
91257A722 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: July 2026