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PartsTable / COMPONENT / 12Z1
12Z1 ✓ 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: 0.280 INCHES NOMINAL IN, thread_length: 1.50 INCHES NOMINAL IN, fastener_length: 1.50 INCHES NOMINAL IN, special_features: MATERIAL: 18-8 SS, 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 5305-01-652-1277, 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
12Z1
NSN: 5305-01-652-1277
FSC: 5305
CAGE: 0KMA3 — ADAMS NUT AND BOLT CO INC (USA)
SPECIFICATIONS
head_styleHEXAGON
head_height0.280 INCHES NOMINAL IN
thread_length1.50 INCHES NOMINAL IN
fastener_length1.50 INCHES NOMINAL IN
special_featuresMATERIAL: 18-8 SS
thread_directionRIGHT-HAND
width_between_flats0.500 INCHES NOMINAL IN
end_item_identification6115-01-591-1161;GENERATOR,HEATING AND AIR CONDITIONER
nominal_thread_diameter0.3125 INCHES IN
thread_quantity_per_inch18
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
part_name_assigned_by_controlling_agencySCREW,STD HEX
NSN5305-01-652-1277
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 12Z1 · 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 DIRECTION: RIGHT-HAND
•
THREAD LENGTH: 1.50 INCHES NOMINAL IN
•
WIDTH BETWEEN FLATS: 0.500 INCHES NOMINAL IN
•
HEAD STYLE: HEXAGON
•
HEAD HEIGHT: 0.280 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH1.50 INCHES NOMINAL IN
WIDTH BETWEEN FLATS0.500 INCHES NOMINAL IN
SPECIAL FEATURESMATERIAL: 18-8 SS
HEAD STYLEHEXAGON
END ITEM IDENTIFICATION6115-01-591-1161;GENERATOR,HEATING AND AIR CONDITIONER
PART NAME ASSIGNED BY CONTROLLING AGENCYSCREW,STD HEX
HEAD HEIGHT0.280 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.3125 INCHES IN
FASTENER LENGTH1.50 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
21-676-2Interchangeable
interchangeable cross-reference
interchangeable
6-105-2Interchangeable
interchangeable cross-reference
interchangeable
6105-1Interchangeable
interchangeable cross-reference
interchangeable
037-78-00-00Interchangeable
interchangeable cross-reference
interchangeable
MIL-R-83285 GR80Interchangeable
interchangeable cross-reference
interchangeable
143-78-00-00Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12Z1?
12Z1 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 12Z1?
There are 11 known substitutes for 12Z1: 21-676-2, 6-105-2, 6105-1 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12Z1?
12Z1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-652-1277. 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