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121-103 — CONDUIT,METAL,FLEXIBLE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

121-103: CONDUIT,METAL,FLEXIBLE.

The CONDUIT,METAL,FLEXIBLE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, end_style: SPRING END,SQUARED AND GROUND BOTH ENDS, head_style: HEXAGON, design_type: REUSABLE, head_height: 0.188 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN, load_rating: 25.847 POUNDS NOMINAL LBS. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-017-7398, 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
121-103
NSN: 5305-00-017-7398
NIINs: 000177398, 005551497, 009409010, 010454160, 011067749, 014710030, 015011809, 016882554
FSC: 5305 — Screws
CAGE: 08683 — BROCKWAY MOTOR TRUCKS DIV OF MACK TRUCKS INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_styleSPRING END,SQUARED AND GROUND BOTH ENDS
head_styleHEXAGON
design_typeREUSABLE
head_height0.188 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
load_rating25.847 POUNDS NOMINAL LBS
thread_class2A A
overall_width8.500 INCHES NOMINAL IN
thread_length0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
body_thickness0.500 INCHES NOMINAL IN
screw_materialSTEEL
stock_diameter0.112 INCHES NOMINAL IN
NSN5305-00-017-7398
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 121-103 · 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 HEIGHT: 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT: CADMIUM OR ZINC
•
FASTENER LENGTH: 0.875 INCHES NOMINAL IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: SAE GR 1 OR 2 ASSN STD SINGLE MATERIAL RESPONSE
•
THREAD LENGTH: 0.781 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
•
HARDNESS RATING: 95.5 ROCKWELL B MINIMUM AND 100.0 ROCKWELL B MAXIMUM
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
HEAD STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTCADMIUM OR ZINC
FASTENER LENGTH0.875 INCHES NOMINAL IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONSAE GR 1 OR 2 ASSN STD SINGLE MATERIAL RESPONSE
THREAD LENGTH0.781 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
HARDNESS RATING95.5 ROCKWELL B MINIMUM AND 100.0 ROCKWELL B MAXIMUM
NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 3
177398Reference document
Same NSN cross-reference
Reference document — Secondary reference
T8S31-14Reference document
Same NSN cross-reference
Reference document — Secondary reference
FFS92TYPE1STYLE10SReference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 121-103?
121-103 is a CONDUIT,METAL,FLEXIBLE.
What parts can replace 121-103?
There are 3 known substitutes for 121-103: 177398, T8S31-14, FFS92TYPE1STYLE10S. Substitute compatibility should be verified for your specific system.
What is the NSN for 121-103?
121-103 is cataloged in the U.S. Government catalog under NSN 5305-00-017-7398. This indicates validated use in U.S. government and defense supply chains.
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