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Technical Data Sheet
PartsTable / COMPONENT / 11321-9
11321-9 ✓ 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: 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 1.000 INCHES MINIMUM IN, fastener_length: 1.960 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN, hardness_rating: 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-298-6572, 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
11321-9
NSN: 5325-00-298-6572
FSC: 5325
CAGE: 08441 — SPX CORPORATION DBA DIELECTRIC COMMUNICATIONS DIV SPX COMMUNICATION TECHNOLOGIES (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN
thread_class2A A
thread_length1.000 INCHES MINIMUM IN
fastener_length1.960 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
hardness_rating25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
width_between_flats0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
minimum_yield_strength92000 POUNDS PER SQUARE INCH LBS
nominal_thread_diameter0.375 INCHES IN
minimum_tensile_strength120000 POUNDS PER SQUARE INCH LBS
NSN5325-00-298-6572
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 11321-9 · 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
•
OUTSIDE DIAMETER: 0.971 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MAJOR THICKNESS: 0.042 INCHES NOMINAL IN
•
RING STYLE: INTERNAL
•
MATERIAL: STEEL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED SDT 66 FS 1066 TO 1090 FED STD SINGLE MATERIAL RESPONSE
•
MATERIAL HARDNESS RATING: 66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.971 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MAJOR THICKNESS0.042 INCHES NOMINAL IN
RING STYLEINTERNAL
MATERIALSTEEL
MATERIAL DOCUMENT AND CLASSIFICATIONFED SDT 66 FS 1066 TO 1090 FED STD SINGLE MATERIAL RESPONSE
MATERIAL HARDNESS RATING66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
USAGE DESIGNINTERNAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
ZZ-I-550Interchangeable
interchangeable cross-reference
interchangeable
3.40/3.00-5Interchangeable
interchangeable cross-reference
interchangeable
3.00-5Interchangeable
interchangeable cross-reference
interchangeable
86034Interchangeable
interchangeable cross-reference
interchangeable
003405Interchangeable
interchangeable cross-reference
interchangeable
3405Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 11321-9?
11321-9 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 11321-9?
There are 27 known substitutes for 11321-9: ZZ-I-550, 3.40/3.00-5, 3.00-5 and 24 more. Substitute compatibility should be verified for your specific system.
Is 11321-9 still available?
11321-9 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: July 2026