PartsTable
Technical Data Sheet
9121-1 ✓ Verified by PartsTable
· NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: STEEL COMP B1112 OVERALL, thickness: 0.344 INCHES NOMINAL IN, shank_length: 0.520 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN, thread_class: 3A NUT THREAD A A, usage_design: FRESH WATER, hole_diameter: 1.031 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-172-7547, 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
9121-1
NSN: 5315-00-172-7547
FSC: 5315
CAGE: 15434 — CUMMINS INC. (USA)
SPECIFICATIONS
materialSTEEL COMP B1112 OVERALL
thickness0.344 INCHES NOMINAL IN
shank_length0.520 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN
thread_class3A NUT THREAD A A
usage_designFRESH WATER
hole_diameter1.031 INCHES NOMINAL IN
overall_width3.000 INCHES MAXIMUM IN
physical_formLIQUID
thread_length3.625 INCHES NOMINAL NUT THREAD A IN
inclosure_typeFULLY INCLOSED
overall_height4.400 INCHES MAXIMUM IN
overall_length0.680 INCHES MINIMUM AND 0.700 INCHES MAXIMUM IN
NSN5315-00-172-7547
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 9121-1 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
PIN OVERALL LENGTH: 1.437 INCHES NOMINAL IN
FIRST END COUNTERSINK ANGLE: 45.0 DEGREES NOMINAL
DISTANCE FROM CENTERLINE OF HOLE TO END OF PIN: 0.156 INCHES NOMINAL IN
MATERIAL: COPPER ALLOY OVERALL
HOLE ARRANGEMENT STYLE: ONE END DRILLED
FIRST END COUNTERSINK DIAMETER: 0.218 INCHES NOMINAL IN
FIRST END STYLE: COUNTERSUNK
FIRST HOLE DIAMETER: 0.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
PIN OVERALL LENGTH1.437 INCHES NOMINAL IN
FIRST END COUNTERSINK ANGLE45.0 DEGREES NOMINAL
DISTANCE FROM CENTERLINE OF HOLE TO END OF PIN0.156 INCHES NOMINAL IN
MATERIALCOPPER ALLOY OVERALL
HOLE ARRANGEMENT STYLEONE END DRILLED
FIRST END COUNTERSINK DIAMETER0.218 INCHES NOMINAL IN
FIRST END STYLECOUNTERSUNK
FIRST HOLE DIAMETER0.125 INCHES NOMINAL IN
PIN OVERALL DIAMETER0.5000 INCHES NOMINAL IN
SPECIAL FEATURES1 HOLE 0.125 IN. DIA DRILLED THRU CENTERLINE OF PIN 0.250 IN. DEEP,90 DEG CW OF COUNTERSUNK END,1 HOLE 0.093 IN. DIA DRILLED THRU OTHER END OF PIN 0.156 IN. TO HOLE CENTER,0.250 IN. DEEP,135 DEG CW @FROM HOLES ON COUNTERSUNK END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
91211Interchangeable
interchangeable cross-reference
interchangeable
1229C705Interchangeable
interchangeable cross-reference
interchangeable
BB27158Interchangeable
interchangeable cross-reference
interchangeable
4-1809Interchangeable
interchangeable cross-reference
interchangeable
1664361Interchangeable
interchangeable cross-reference
interchangeable
9044-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9121-1?
9121-1 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace 9121-1?
There are 8 known substitutes for 9121-1: 91211, 1229C705, BB27158 and 5 more. Substitute compatibility should be verified for your specific system.
Is 9121-1 still available?
9121-1 is currently cancelled.
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