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Technical Data Sheet
PartsTable / COMPONENT / 1177B4-12
1177B4-12 ✓ 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: ROUND, head_height: 0.086 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.193 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN, thread_length: 0.700 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN, screw_material: COPPER ALLOY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-151-0983, 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
1177B4-12
NSN: 5305-00-151-0983
FSC: 5305
CAGE: 80020 — NAVAL AIR WARFARE CENTER AIRCRAFT DIVISION JOINT BASE JBMDL (USA)
SPECIFICATIONS
head_styleROUND
head_height0.086 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.193 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
thread_length0.700 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
screw_materialCOPPER ALLOY
fastener_length0.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.112 INCHES IN
minimum_tensile_strength55000 POUNDS PER SQUARE INCH LBS
thread_quantity_per_inch40
NSN5305-00-151-0983
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1177B4-12 · 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
•
HEAD DIAMETER: 0.193 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
•
THREAD CLASS: 2A A
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD DIAMETER: 0.112 INCHES IN
•
THREAD QUANTITY PER INCH: 40
•
SCREW MATERIAL: COPPER ALLOY
•
HEAD HEIGHT: 0.086 INCHES MAXIMUM IN
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
TECHNICAL CHARACTERISTICS (FLIS)
HEAD DIAMETER0.193 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
THREAD CLASS2A A
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD DIAMETER0.112 INCHES IN
THREAD QUANTITY PER INCH40
SCREW MATERIALCOPPER ALLOY
HEAD HEIGHT0.086 INCHES MAXIMUM IN
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
MINIMUM TENSILE STRENGTH55000 POUNDS PER SQUARE INCH LBS
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
FFS92ANDTYPE3STYLE1CInterchangeable
interchangeable cross-reference
interchangeable
AN515-8R12Interchangeable
interchangeable cross-reference
interchangeable
808P107CInterchangeable
interchangeable cross-reference
interchangeable
784-8-20Interchangeable
interchangeable cross-reference
interchangeable
AN515-8R20Interchangeable
interchangeable cross-reference
interchangeable
1177-8-20Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1177B4-12?
1177B4-12 is a SCREW,MACHINE.
What parts can replace 1177B4-12?
There are 18 known substitutes for 1177B4-12: FFS92ANDTYPE3STYLE1C, AN515-8R12, 808P107C and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1177B4-12?
1177B4-12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-151-0983. 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